| Author | Title | Year | Journal/Proceedings | Reftype | DOI/URL |
|---|---|---|---|---|---|
| Abdullah, U.H., Pizzi, A., Rode, K., Delmotte, L., Zhou, X. and Mansouri, H.R. | Mimosa tannin resins for impregnated paper overlays | 2013 | European Journal of Wood and Wood Products Vol. 71(2), pp. 153-162 |
article | DOI |
| Abstract: The surface quality of plywood coated with resin impregnated papers based on tannin/furfuryl alcohol resins was studied. Several hardeners such as hexamine, paraformaldehyde, formurea and a mixture of formurea and paraformaldehyde were added in small quantities to a mimosa tannin/furfuryl alcohol resin. Papers impregnated with resin based on tannin + furfuryl alcohol + paraformaldehyde, or + formurea were found to yield excellent results in standard water vapour resistance and cross-cut tests. Matrix assisted laser desorption ionization time of flight (MALDI-TOF) mass spectrometry and cross-polarisation-magic angle spinning NMR (CP-MAS C-13 NMR) were used to show coreaction of tannin with furfuryl alcohol and even furfuryl alcohol self condensation under alkaline conditions, as well as coreaction of formaldehyde-yielding compounds such as hexamine with both tannin aromatic rings and the aromatic ring of furfuryl alcohol. Some of the more important oligomers formed were identified by MALDI-TOF. | |||||
BibTeX:
@article{Abdullah2013,
author = {Abdullah, U. H. and Pizzi, A. and Rode, K. and Delmotte, L. and Zhou, X. and Mansouri, H. R.},
title = {Mimosa tannin resins for impregnated paper overlays},
journal = {European Journal of Wood and Wood Products},
year = {2013},
volume = {71},
number = {2},
pages = {153--162},
doi = {http://doi.org/10.1007/s00107-012-0652-5}
}
|
|||||
| Achelle, S., Malval, J.P., Aloise, S., Barsella, A., Spangenberg, A., Mager, L., Akdas-Kilig, H., Fillaut, J.L., Caro, B. and Robin-le Guen, F. | Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine-Based Dyes Bearing Methylenepyran Donor Groups | 2013 | Chemphyschem Vol. 14(12), pp. 2725-2736 |
article | DOI |
| Abstract: The nonlinear properties and the photophysical behavior of two -conjugated chromophores that incorporate an electron-deficient pyrimidine core (A) and -methylenepyrans as terminal donor (D) groups have been thoroughly investigated. Both dipolar and quadrupolar branching strategies are explored and rationalized on the basis of the Frenkel exciton model. Even though a cooperative effect is clearly observed if the dimensionality is increased, the nonlinear optical (NLO) response of this series is moderate if one considers the nature of the D/A couple and the size of the chromophores (as measured by the number of electrons). This effect was attributed to a disruption in the electronic conjugation within the dyes' scaffold for which the geometry deviates from planarity owing to a noticeable twisting of the pyranylidene end-groups. This latter structural parameter also has a strong influence on the excited-state dynamics, which leads to a very efficient fluorescence quenching. | |||||
BibTeX:
@article{Achelle2013,
author = {Achelle, S. and Malval, J. P. and Aloise, S. and Barsella, A. and Spangenberg, A. and Mager, L. and Akdas-Kilig, H. and Fillaut, J. L. and Caro, B. and Robin-le Guen, F.},
title = {Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine-Based Dyes Bearing Methylenepyran Donor Groups},
journal = {Chemphyschem},
year = {2013},
volume = {14},
number = {12},
pages = {2725--2736},
doi = {http://doi.org/10.1002/cphc.201300419}
}
|
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| Adohi, B.J.P., Bychanok, D., Haidar, B. and Brosseau, C. | Microwave and mechanical properties of quartz/graphene-based polymer nanocomposites | 2013 | Applied Physics Letters Vol. 102(7), pp. 072903 |
article | DOI |
| Abstract: We report microwave spectroscopy studies of graphene-based polymer-matrix composite materials subject to uniaxial elongation. The samples were prepared via shear mixing under the same thermal processing conditions of amorphous styrene butadiene rubber (SBR) with quartz grains on the order of micrometers in size and/or graphene sheets with thickness 10-20 nm and average lateral size 200 mu m. An important result is the observation of a significant increase (up to 25%) in the effective microwave permittivity of hybridized nanocomposites comprising both quartz and graphene compared to the nanocomposites with quartz only. We suggest that the coating of quartz grains by graphene sheets is the most likely origin of this synergetic effect. In all cases, we also observe that the permittivity spectrum is unaffected by strain up to 8%. By examining the mechanical response, it is shown that the elasticity network of SBR polymer chains is significantly affected in the rubbery state by filling SBR with graphene and quartz particles. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793411] | |||||
BibTeX:
@article{Adohi2013,
author = {Adohi, B. J. P. and Bychanok, D. and Haidar, B. and Brosseau, C.},
title = {Microwave and mechanical properties of quartz/graphene-based polymer nanocomposites},
journal = {Applied Physics Letters},
year = {2013},
volume = {102},
number = {7},
pages = {072903},
doi = {http://doi.org/10.1063/1.4793411}
}
|
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| Ait Akbour, R., Jada, A. and Douch, J | Effects of Solution Chemistry on the Fluorescence and Electrophoretic Behaviours of Humic Acid | 2013 | colloid science and biotechnology Vol. 2(1), pp. 1-8 |
article | DOI |
| Abstract: In the soil, the metal-organic interactions, including complexation reactions, that occur between Humic Acid (HA) and various cations (Ba2+, Ca2+, Cu2+, and Zn2+) play a key role in the speciation of divalent ions, and therefore in controlling their biological availability, accumulation and mobility. In order to elucidate the mechanism of such reactions, the effect of various divalent salts (BaCl2, CaCl2, CuCl2, and ZnCl2) on the fluorescence and surface charge properties of a commercial HA, were investigated in the present work. The data indicate that in the presence of increasing added salt amount of BaCl2, CaCl2, and ZnCl2, the HA fluorescence intensities decrease linearly and zetapotential magnitude diminished and reached plateau value. However, non-linear marked decrease of the HA fluorescence intensities, and enhanced zeta-potential decrease, were observed in the presence of increasing CuCl2 added salt amount. Further, by decreasing the aqueous phase pH, in the range pH = 10-4, similar decreases of the HA fluorescence intensities and zeta-potential magnitudes, were also observed. It is shown that Cu2+ divalent cations, as compared to Zn2+, Ba2+, and Ca2+ ions, exhibit greater fluorescence quenching ability and complexing capacity of HA macromolecules. The observed fluorescence and surface charge decrease of HA macromolecules, in the presence of divalent cations, result from cation exchange process, and lead to conformational changes of the macromolecule. The fluorescence and zeta potential data indicate that HA macromolecule has different capacities to interact with various metal ions, and the order of divalent cation complexing capacity with HA is found as follows: Cu > Ba > Ca Zn. | |||||
BibTeX:
@article{AitAkbour2013,
author = {Ait Akbour, R. and Jada, A. and Douch J},
title = {Effects of Solution Chemistry on the Fluorescence and Electrophoretic Behaviours of Humic Acid},
journal = {colloid science and biotechnology},
year = {2013},
volume = {2},
number = {1},
pages = {1-8},
doi = {http://doi.org/10.1166/jcsb.2013.1030}
}
|
|||||
| Akbour, R.A., Amal, H., Ait-Addi, A., Douch, J., Jada, A. and Hamdani, M. | Transport and retention of humic acid through natural quartz sand: Influence of the ionic strength and the nature of divalent cation | 2013 | Colloids and Surfaces A: Physicochemical and Engineering Aspects Vol. 436(0), pp. 589-598 |
article | URL |
| Abstract: Abstract In order to elucidate the environmental problems arising from the mobility enhancement of metallic contaminants due to the presence of humic acid (HA) in water, transport and retention experiments of HA, in the presence and in the absence of divalent ions Me2+ (Ca2+, Cu2+ and Pb2+), through natural quartz sand (NQS) porous medium, were carried out. The breakthrough curve and the HA adsorbed amount were measured in each experiment, indicating colloid retention was highly dependent on the suspension ionic strength, and the nature of divalent cation present in the aqueous phase. The data show that in the absence of divalent cations, the adsorbed HA amount at solid-water interface was found to increase with increasing the ionic strength, whereas the flow rate does not affect the retained HA amount on quartz sand. Further, in the presence of divalent cations, the adsorbed HA amount was found to be function, not only of the ionic strength, but also to depend on the divalent cation affinity toward the HA macromolecule. Thus, cations having lower affinity for HA, lead to highest adsorbed HA, whereas cations having higher affinity for HA, give the lowest adsorbed HA on the NQS surface. It is shown that the adsorption of HA, or its complex form with divalent cations (HA-Me2+), on the mineral-water interface, is an irreversible process which is limited by the blocking effect. | |||||
BibTeX:
@article{Akbour2013,
author = {Akbour, R. Ait and Amal, H. and Ait-Addi, A. and Douch, J. and Jada, A. and Hamdani, M.},
title = {Transport and retention of humic acid through natural quartz sand: Influence of the ionic strength and the nature of divalent cation},
journal = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
year = {2013},
volume = {436},
number = {0},
pages = {589--598},
url = {http://www.sciencedirect.com/science/article/pii/S0927775713005852}
}
|
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| Alonso, B. and Marichal, C. | Solid-state NMR studies of micelle-templated mesoporous solids | 2013 | Chemical Society Reviews Vol. 42, pp. 3808-3820 |
article | URL |
| Abstract: In this tutorial review we intend to give an overview of the potential of NMR spectroscopy, and in particular solid-state NMR, in characterising micelle-templated mesoporous materials. Different topics are covered including the study of formation mechanisms, the characterisation of structures, textures, surfaces and interfaces, functionalisation, dynamic properties and structure-reactivity correlations. Some selected examples illustrate the variety of information provided by this spectroscopy. Particular attention is paid to recent technological and/or methodological developments. | |||||
BibTeX:
@article{Alonso2013,
author = {Alonso, Bruno and Marichal, Claire},
title = {Solid-state NMR studies of micelle-templated mesoporous solids},
journal = {Chemical Society Reviews},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {42},
pages = {3808--3820},
url = {http://dx.doi.org/10.1039/C2CS35368G}
}
|
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| Assaker, K., Lebeau, B., Marichal, C., Carteret, C., Vidal, L., Stebe, M.-J. and Blin, J.-L. | Facile and green release of template from mesostructured titania | 2013 | RSC Adv. Vol. 3, pp. 14970-14974 |
article | DOI URL |
| Abstract: Molecules of pluronic P123 template can be efficiently removed from the pores of mesostructured titania by water extraction at various temperatures from ambient to 100 [degree]C. Such soft and green treatment leads to the formation of anatase nanocrystallites in the walls of the mesoporous titania solid even at room temperature. | |||||
BibTeX:
@article{Assaker2013,
author = {Assaker, Karine and Lebeau, Benedicte and Marichal, Claire and Carteret, Cedric and Vidal, Loic and Stebe, Marie-Jose and Blin, Jean-Luc},
title = {Facile and green release of template from mesostructured titania},
journal = {RSC Adv.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {3},
pages = {14970-14974},
url = {http://dx.doi.org/10.1039/C3RA42981D},
doi = {http://doi.org/10.1039/C3RA42981D}
}
|
|||||
| Azoug, A., Constantinescu, A., Pradeilles-Duval, R.M., Vallat, M.F., Neviere, R. and Haidar, B. | Effect of the sol fraction and hydrostatic deformation on the viscoelastic behavior of prestrained highly filled elastomers | 2013 | Journal of Applied Polymer Science Vol. 127(3), pp. 1772-1780 |
article | DOI |
| Abstract: This study focuses on the relations between the microstructure and the viscoelastic behavior of an industrial solid propellant belonging to the class of highly filled elastomers. Precisely, the study aims at determining the impact on the viscoelastic behavior of the presence of the sol fraction inside the polymer network. The sol fraction is the part of the binder that a good solvent can extract. The solid propellant is swollen to various extents by solutions of plasticizer and polymer molecules. This swelling leads to a hydrostatic deformation of the polymer network, corresponding to an extension or contraction loading for each specimen. Prestrained dynamic mechanical analysis tests, superimposing a small oscillating strain on a prestrain, characterize the viscoelastic behavior. The degree of swelling of the network and the effective filler fraction drive the viscoelastic response. In addition, the mechanical behavior does not depend on the chemical nature of the introduced sol fraction. Moreover, a nonlinear behavior, i.e., an increase in both storage and loss moduli with increasing prestrain, is initiated at low prestrain. This nonlinearity depends on the contraction or extension of the network and could result from particles aligning with prestrain, which is expected in such highly filled materials. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 127: 1772-1780, 2013 | |||||
BibTeX:
@article{Azoug2013,
author = {Azoug, A. and Constantinescu, A. and Pradeilles-Duval, R. M. and Vallat, M. F. and Neviere, R. and Haidar, B.},
title = {Effect of the sol fraction and hydrostatic deformation on the viscoelastic behavior of prestrained highly filled elastomers},
journal = {Journal of Applied Polymer Science},
year = {2013},
volume = {127},
number = {3},
pages = {1772--1780},
doi = {http://doi.org/10.1002/app.37800}
}
|
|||||
| Bacharouche, J., Badique, F., Fahs, A., Spanedda, M.V., Geissler, A., Malval, J.-P., Vallat, M.-F., Anselme, K., Francius, G., Frisch, B., Hemmerlé, J., Schaaf, P. and Roucoules, V. | Biomimetic Cryptic Site Surfaces for Reversible Chemo- and Cyto-Mechanoresponsive Substrates | 2013 | ACS Nano Vol. 7(4)ACS Nano, pp. 3457-3465 |
article | DOI URL |
| Abstract: Chemo-mechanotransduction, the way by which mechanical forces are transformed into chemical signals, plays a fundamental role in many biological processes. The first step of mechanotransduction often relies on exposure, under stretching, of cryptic sites buried in adhesion proteins. Likewise, here we report the first example of synthetic surfaces allowing for specific and fully reversible adhesion of proteins or cells promoted by mechanical action. Silicone sheets are first plasma treated and then functionalized by grafting sequentially under stretching poly(ethylene glycol) (PEG) chains and biotin or arginine-glycine-aspartic acid (RGD) peptides. At unstretched position, these ligands are not accessible for their receptors. Under a mechanical deformation, the surface becomes specifically interactive to streptavidin, biotin antibodies, or adherent for cells, the interactions both for proteins and cells being fully reversible by stretching/unstretching, revealing a reversible exposure process of the ligands. By varying the degree of stretching, the amount of interacting proteins can be varied continuously. Chemo-mechanotransduction, the way by which mechanical forces are transformed into chemical signals, plays a fundamental role in many biological processes. The first step of mechanotransduction often relies on exposure, under stretching, of cryptic sites buried in adhesion proteins. Likewise, here we report the first example of synthetic surfaces allowing for specific and fully reversible adhesion of proteins or cells promoted by mechanical action. Silicone sheets are first plasma treated and then functionalized by grafting sequentially under stretching poly(ethylene glycol) (PEG) chains and biotin or arginine-glycine-aspartic acid (RGD) peptides. At unstretched position, these ligands are not accessible for their receptors. Under a mechanical deformation, the surface becomes specifically interactive to streptavidin, biotin antibodies, or adherent for cells, the interactions both for proteins and cells being fully reversible by stretching/unstretching, revealing a reversible exposure process of the ligands. By varying the degree of stretching, the amount of interacting proteins can be varied continuously. | |||||
BibTeX:
@article{Bacharouche2013a,
author = {Bacharouche, Jalal and Badique, Florent and Fahs, Ahmad and Spanedda, Maria V. and Geissler, Alexandre and Malval, Jean-Pierre and Vallat, Marie-France and Anselme, Karine and Francius, Grégory and Frisch, Benoit and Hemmerlé, Joseph and Schaaf, Pierre and Roucoules, Vincent},
title = {Biomimetic Cryptic Site Surfaces for Reversible Chemo- and Cyto-Mechanoresponsive Substrates},
booktitle = {ACS Nano},
journal = {ACS Nano},
publisher = {American Chemical Society},
year = {2013},
volume = {7},
number = {4},
pages = {3457--3465},
url = {http://dx.doi.org/10.1021/nn400356p},
doi = {http://doi.org/10.1021/nn400356p}
}
|
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| Bacharouche, J., Haidara, H., Kunemann, P., Vallat, M.F. and Roucoules, V. | Singularities in hydrophobic recovery of plasma treated polydimethylsiloxane surfaces under non-contaminant atmosphere | 2013 | Sensors and Actuators A-physical Vol. 197, pp. 25-29 |
article | DOI |
| Abstract: Herein, the hydrophobic recovery of argon plasma treated polydimethylsiloxane surfaces is explored. In contrast to previous works, environmental contamination is here taken into account. We find that diffusion and reorientation strongly dominate the hydrophobic recovery under high thermal activation (60 degrees C), no matter the surrounding environment during storage. However, at lower temperature (24 degrees C and below), we find that contamination plays a major role in lab atmosphere environment. By working at low temperature and under inert nitrogen atmosphere to slow down the diffusion and reorientation dynamics and to avoid contamination, we identify two different temperature-dependent regimes in the kinetics of the hydrophobic recovery. One is fast and involves exclusively relaxation processes occurring in the surface region. The second, much slower, concerns diffusion phenomena in the sub-surface region. Thereby, the specific impact of bulk diffusion and surface reorientation processes can be distinguished during aging by slowing down the surface dynamics and by eliminating all possible sources of contamination. (c) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Bacharouche2013b,
author = {Bacharouche, J. and Haidara, H. and Kunemann, P. and Vallat, M. F. and Roucoules, V.},
title = {Singularities in hydrophobic recovery of plasma treated polydimethylsiloxane surfaces under non-contaminant atmosphere},
journal = {Sensors and Actuators A-physical},
year = {2013},
volume = {197},
pages = {25--29},
doi = {http://doi.org/10.1016/j.sna.2013.04.003}
}
|
|||||
| Bacharouche, J., Kunemann, P., Fioux, P., Vallat, M.-F., Lalevee, J., Hemmerlé, J. and Roucoules, V. | A simple method for fabrication of filler-free stretchable polydimethylsiloxane surfaces | 2013 | Applied Surface Science Vol. 270Applied Surface Science, pp. 64-76 |
article | URL |
| Abstract: We propose a simple method to elaborate a filler-free stretchable PDMS surface strong enough to resist to successive elongation/retraction cycles even at high degree of stretching. It consists in creating free radicals on a filler-containing PDMS surface by argon plasma exposure and reacting them with a filler-free PDMS resin during the crosslinking step. Changes of physical and chemical properties upon plasma modification are monitored by FTIR and XPS spectroscopies, contact angle measurements and atomic force microscopy. Electron spin resonance (ESR) is used to identify the nature of radicals involved in interfacial bonding. Although a brittle silica-like layer is created on the filler-containing PDMS surface after plasma treatment, an increase in the PDMS/PDMS interfacial strength is observed and a high interfacial resistance has been found under elongation/retraction (stretching/relaxation) cycles. | |||||
BibTeX:
@article{Bacharouche2013c,
author = {Bacharouche, J. and Kunemann, P. and Fioux, P. and Vallat, M.-F. and Lalevee, J. and Hemmerlé, J. and Roucoules, V.},
title = {A simple method for fabrication of filler-free stretchable polydimethylsiloxane surfaces},
booktitle = {Applied Surface Science},
journal = {Applied Surface Science},
year = {2013},
volume = {270},
pages = {64--76},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875216874&doi=10.1016%2fj.apsusc.2012.12.083&partnerID=40&md5=5e4f136b9aca8df2fe0cfde513a01969}
}
|
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| Badique, F., Stamov, D.R., Davidson, P.M., Veuillet, M., Reiter, G., Freund, J.-N., Franz, C.M. and Anselme, K. | Directing nuclear deformation on micropillared surfaces by substrate geometry and cytoskeleton organization | 2013 | Biomaterials Vol. 34(12), pp. 2991-3001 |
article | URL |
| Abstract: We have recently demonstrated strong nuclear deformation of SaOs-2 osteosarcoma cells on poly-l-lactic acid (PLLA) micropillar substrates. In the present study, we first demonstrated that chemical and mechanical properties of the micropillar substrates have no dominant effect on deformation. However, SaOs-2 nucleus deformation could be strongly modulated by varying the pillar size and spacing, highlighting the importance of geometric constraints for shaping the nucleus. Furthermore, comparing the capacity for nuclear deformation in three different osteosarcoma cell lines (SaOs-2, MG-63 and OHS-4) revealed strong cell-type specific differences. Surprisingly, the highly-deformable SaOs-2 cell line displayed the highest cell stiffness as assessed by AFM-based colloidal force spectroscopy and featured a more prominent array of actin fibres above the nucleus, suggesting a link between actin-mediated cell stiffness and cell nucleus deformation. In contrast, in MG-63 and OHS-4 cells dense microtubule and vimentin networks seem to facilitate some nuclear deformation even in the absence of a prominent actin cytoskeleton. Together these results suggest that an interaction of all three cytoskeletal elements is needed for efficient nuclear deformation. In conclusion, the dominant parameters influencing nuclear deformation on micropillar substrates are not their material properties but the substrate geometry together with cell phenotype and cytoskeleton organization. | |||||
BibTeX:
@article{Badique2013,
author = {Badique, Florent and Stamov, Dimitar R. and Davidson, Patricia M. and Veuillet, Matthieu and Reiter, Günter and Freund, Jean-Noël and Franz, Clemens M. and Anselme, Karine},
title = {Directing nuclear deformation on micropillared surfaces by substrate geometry and cytoskeleton organization},
journal = {Biomaterials},
year = {2013},
volume = {34},
number = {12},
pages = {2991--3001},
url = {http://www.sciencedirect.com/science/article/pii/S0142961213000343}
}
|
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| Bakhti, S., Destouches, N., Balan, L., Gamet, E. and Reynaud, S. | Self-organized micro-holes on titania based sol-gel films under continuous direct writing with a continuous wave ultraviolet laser | 2013 | Applied Physics Letters Vol. 102(21), pp. 211903 |
article | DOI |
| Abstract: The microstructuring of titania based sol-gel films is investigated by direct writing with a continuous wave ultraviolet laser beam emitting at 244 nm. Depending on the exposure conditions, the films exhibit a volume expansion, a volume shrinkage, a self-shaped delamination, or are damaged. This paper is mainly focused on the regime where spontaneous local delamination occurs, which corresponds to a narrow range of laser irradiances and writing speeds. In this regime, self-organized round-shape micro-holes opened on the substrate are generated. (C) 2013 AIP Publishing LLC. | |||||
BibTeX:
@article{Bakhti2013,
author = {Bakhti, S. and Destouches, N. and Balan, L. and Gamet, E. and Reynaud, S.},
title = {Self-organized micro-holes on titania based sol-gel films under continuous direct writing with a continuous wave ultraviolet laser},
journal = {Applied Physics Letters},
year = {2013},
volume = {102},
number = {21},
pages = {211903},
doi = {http://doi.org/10.1063/1.4807784}
}
|
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| Balan, L., Ghimbeu Camelia Matei, C., Vidal, L. and Vix-Guterl, C. | Photoassisted synthesis of manganese oxide nanostructures using visible light at room temperature | 2013 | Green Chem. Vol. 15(8), pp. 2191-2199 |
article | URL |
| Abstract: A green chemistry approach was successfully used in this work to synthesize manganese oxide nanoparticles with different shapes and crystalline phases. This approach is based on the visible light irradiation (445 nm) at room temperature of an aqueous solution of a manganese(ii) salt in the presence of an alkaline hydroxide (NaOH, KOH or LiOH). Several experimental parameters, i.e., the nature of the precursor salt, hydroxide concentration, hydroxide type, irradiation time and the atmosphere, were tuned and their influence on the morphology and the structure of the nanoparticles was studied by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. A diversity of manganese oxide phases ([small lambda]-MnO2, [gamma]-Mn3O4 and MnO(OH)) were obtained. It must be emphasized that these compounds were easily and fairly quickly synthesized at room temperature, without surfactants and, moreover, by using an environmentally friendly method. In addition, the successful control of the size and the shape of the nanoparticles allowed to obtain a variety of nanoparticles morphologies ranging from one-dimensional (1-D) to three-dimensional (3-D) nanostructures (i.e., spherical, nanorods, nanoflowers, nanocubes). This synthetic approach could be readily extended to other transition metal oxides. | |||||
BibTeX:
@article{Balan2013,
author = {Balan, Lavinia and Ghimbeu, Camelia Matei, Camelia and Vidal, Loic and Vix-Guterl, Cathie},
title = {Photoassisted synthesis of manganese oxide nanostructures using visible light at room temperature},
journal = {Green Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {15},
number = {8},
pages = {2191--2199},
url = {http://dx.doi.org/10.1039/C3GC40487K}
}
|
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| Barat, D., Bardinal, V., Dika, I., Soppera, O., Rumyantseva, A., Reig, B., Renault, M., Bruyant, A., Doucet, J., Camps, T., Malval, J. and Daran, E. | Microlens self-writing on vertical laser diodes by Near Infra-Red photo-polymerization | 2013 | Microelectronic Engineering Vol. 111(0), pp. 204-209 |
article | URL |
| Abstract: Abstract We report on the improvement of a fabrication method for micro-optics integration on vertical semiconductor laser diodes (VCSELs). Our approach is based on microlens self-writing by the laser beam itself thanks to self-guided Near-Infra-Red photopolymerization. Fabrication conditions have been optimized to control and take benefit of process sensitivity to oxygen quenching and to make possible the study of photo-chemical parameters influence on final tip geometry. The interest of this simple method for fabricating focused-beam VCSELs is finally discussed. | |||||
BibTeX:
@article{Barat2013,
author = {Barat, D. and Bardinal, V. and Dika, I. and Soppera, O. and Rumyantseva, A. and Reig, B. and Renault, M. and Bruyant, A. and Doucet, J.B. and Camps, T. and Malval, J.P. and Daran, E.},
title = {Microlens self-writing on vertical laser diodes by Near Infra-Red photo-polymerization},
journal = {Microelectronic Engineering},
year = {2013},
volume = {111},
number = {0},
pages = {204-209},
url = {http://www.sciencedirect.com/science/article/pii/S0167931713003870}
}
|
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| Belibi, P.C., Daou, J., Ndjaka, J.-M.B., Michelin, L., Brendlé, J., Nsom, B. and Durand, B. | Tensile and water barrier properties of cassava starch composite films reinforced by synthetic zeolite and beidellite | 2013 | Journal of Food Engineering Vol. 115(3), pp. 339-346 |
article | URL |
| Abstract: Composites films were prepared by the casting method using native cassava starch plasticized with glycerol and 3D or 2D synthetic fillers i.e. Beta zeolite and Na-beidellite type 2:1 phyllosilicate. Special attention was paid to the effect of the filler contents and type on the mechanical and barrier properties. It was shown that films reinforced with lyophilized Beta zeolite presented both high water solubility (WS) and water vapor permeability (WVP) values than the pristine starch whereas an improvement on the WVP was found for composites prepared from Na-beidellite or from non lyophilized Beta zeolite. For the two types of fillers, a drastic increase of the mechanical properties (especially in the Young’s modulus) was observed. | |||||
BibTeX:
@article{Belibi2013,
author = {Belibi, Pierre C. and Daou, Jean and Ndjaka, Jean-Marie B. and Michelin, Laure and Brendlé, Jocelyne and Nsom, Blaise and Durand, Bernard},
title = {Tensile and water barrier properties of cassava starch composite films reinforced by synthetic zeolite and beidellite},
journal = {Journal of Food Engineering},
year = {2013},
volume = {115},
number = {3},
pages = {339--346},
url = {http://www.sciencedirect.com/science/article/pii/S0260877412004918}
}
|
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| Bellec, A., chaput , L., Dujardin, G., Riedel, D., Stauffer, L. and Sonnet, P. | Reversible charge storage in a single silicon atom | 2013 | Physical Review B Vol. 88, pp. 241406 |
article | DOI |
| Abstract: The ultimate miniaturization of electronic devices at the atomic scale with single electrons requires controlling the reversible charge storage in a single atom. However, reversible charge storage is difficult to control as usually only one charge state can be stabilized. Here, combining scanning tunneling microscopy (STM) and density functional theory (DFT), we demonstrate that a single silicon dangling bond of a hydrogenated p-type doped Si(100) surface has two stable charge states (neutral and negatively charged) at low temperature (5 K). Reversible charge storage is achieved using a gate electric field between the STM tip and the surface. | |||||
BibTeX:
@article{Bellec2013,
author = {Bellec, A. and chaput, L. and Dujardin, G. and Riedel, D and Stauffer, L. and Sonnet, P},
title = {Reversible charge storage in a single silicon atom},
journal = {Physical Review B},
year = {2013},
volume = {88},
pages = {241406},
doi = {http://doi.org/10.1103/PhysRevB.88.241406}
}
|
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| Belmeguenai, M., Tuzcuoglu, H., Gabor, M.S., Petrisor, T., Tiusan, C., Berling, D., Zighem, F., Chauveau, T., Cherif, S.M. and Moch, P. | Co2FeAl thin films grown on MgO substrates: Correlation between static, dynamic, and structural properties | 2013 | Physical Review B Vol. 87(18), pp. 184431 |
article | DOI |
| Abstract: Co2FeAl (CFA) thin films with thickness varying from 10 to 115 nm have been deposited on MgO(001) substrates by magnetron sputtering and then capped by a Ta or Cr layer. X-ray diffraction (XRD) revealed that the cubic [001] CFA axis is normal to the substrate and that all the CFA films exhibit full epitaxial growth. The chemical order varies from the B2 phase to the A2 phase when decreasing the thickness. Magneto-optical Kerr effect (MOKE) and vibrating sample magnetometer (VSM) measurements show that, depending on the field orientation, one- or two-step switchings occur. Moreover, the films present a quadratic MOKE signal increasing with the CFA thickness, due to the increasing chemical order. Ferromagnetic resonance (FMR), MOKE transverse bias initial inverse susceptibility and torque (TBIIST) measurements reveal that the in-plane anisotropy results from the superposition of a uniaxial and of a fourfold symmetry term. The fourfold anisotropy is in accord with the crystal structure of the samples and is correlated to the biaxial strain and to the chemical order present in the films. In addition, a large negative perpendicular uniaxial anisotropy is observed. Frequency and angular dependencies of the ferromagnetic resonance linewidth show two magnon scattering and mosaicity contributions, which depend on the CFA thickness. A Gilbert damping coefficient as low as 0.0011 is found. | |||||
BibTeX:
@article{Belmeguenai2013,
author = {Belmeguenai, M. and Tuzcuoglu, H. and Gabor, M. S. and Petrisor, T. and Tiusan, C. and Berling, D. and Zighem, F. and Chauveau, T. and Cherif, S. M. and Moch, P.},
title = {Co2FeAl thin films grown on MgO substrates: Correlation between static, dynamic, and structural properties},
journal = {Physical Review B},
year = {2013},
volume = {87},
number = {18},
pages = {184431},
doi = {http://doi.org/10.1103/PhysRevB.87.184431}
}
|
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| Belmeguenai, M., Tuzcuoglu, H., Berling, D., Chérif, S., Roussigné, Y., Devolder, T. and Westerholt, K. | Ferromagnetic resonance, transverse bias initial inverse susceptibility and torque studies of magnetic properties of Co2MnSi thin films [BibTeX] |
2013 | EPJ Web of Conferences Vol. 40, pp. - |
article | URL |
BibTeX:
@article{Belmeguenai2013a,
author = {Belmeguenai, M. and Tuzcuoglu, H. and Berling, D. and Chérif, S.M. and Roussigné, Y. and Devolder, T. and Westerholt, K.},
title = {Ferromagnetic resonance, transverse bias initial inverse susceptibility and torque studies of magnetic properties of Co2MnSi thin films},
journal = {EPJ Web of Conferences},
year = {2013},
volume = {40},
pages = {--},
url = {http://dx.doi.org/10.1051/epjconf/20134018001}
}
|
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| Ben Jazia, D., Vonna, L., Knopf, S., Schrodj, G., Nouali, H., Lebeau, B., Holl, Y. and Haidara, H. | Absorption of water/ethanol microdroplets into model porous networks | 2013 | Colloids and Surfaces A-physicochemical and Engineering Aspects Vol. 436, pp. 363-370 |
article | DOI |
| Abstract: In this paper, the imbibition kinetics of model nanoporous substrates is analyzed. The model nanoporous networks were formed by polystyrene microbeads assemblies. Spontaneous imbibition of these structures with sessile droplets was achieved using water/ethanol mixtures of higher wettability than pure water. The lowest concentration of ethanol leading to the spontaneous imbibition was 30%, and the diameter of the microbeads that ranges from similar to 420 nm to similar to 2230 nm. For ethanol concentrations slightly above this threshold value of 30%, the time dependence of the penetration depth was found to follow the expected t(0.5) time dependence. In this low ethanol concentration range, the imbibition rate was shown to decrease as the diameter of the microbeads increases. This result was attributed to the resistive filling of the throats formed around the contact between two beads that increases with the diameter of the microbeads. At constant bead diameter, an acceleration of the fluid progression was observed when increasing the ethanol concentration, i.e. the capillary force. At high ethanol concentrations the penetration no longer followed the t(0.5) dependence, but linear time dependence over the whole life of the droplet. This acceleration of the imbibition rate was attributed to a prewetting of the internal porous structure by the most volatile ethanol component of the mixture that condenses in the throat formed around the contact between two beads. (C) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{BenJazia2013,
author = {Ben Jazia, D. and Vonna, L. and Knopf, S. and Schrodj, G. and Nouali, H. and Lebeau, B. and Holl, Y. and Haidara, H.},
title = {Absorption of water/ethanol microdroplets into model porous networks},
journal = {Colloids and Surfaces A-physicochemical and Engineering Aspects},
year = {2013},
volume = {436},
pages = {363--370},
doi = {http://doi.org/10.1016/j.colsurfa.2013.06.036}
}
|
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| Bigerelle, M., Najjar, D., Mathia, T., Iost, A., Coorevits, T. and Anselme, K. | An expert system to characterise the surfaces morphological properties according to their tribological functionalities: The relevance of a pair of roughness parameters | 2013 | Tribology International Vol. 59(0)ENERGY AND HEALTH, pp. 190-202 |
article | URL |
| Abstract: Knowing that a surface or profile can be characterized by numerous roughness parameters, the objective of this investigation was to present a methodology which aims to determine quantitatively and without preconceived opinion the most relevant pair of roughness parameters that describe an abraded surface. The methodology was firstly validated on simulated fractal profiles having different amplitudes and Hölder exponents and it was secondly applied to characterise different worn regions of a retrieved metallic femoral head articulated against an ultra-high molecular weight polyethylene (UHMWPE) acetabular cup containing an embedded metallic fibber into its surface. The methodology consists in combining the recent Bootstrap method with the usual discriminant analysis. It was validated on simulated fractal profiles showing that, among more than 3000 pairs tested, the total amplitude Rt and the fractal dimension Δ is the most relevant pair of roughness parameters; parameters corresponding to the variables modulated in the analytical expression of the fractal function. The application of this methodology on a retrieved metallic femoral head shows that the most relevant pair of parameters for discriminating the different investigated worn regions is the arithmetic roughness parameter Ra paired with the mean peak height Rpm. This methodology finally helps in a better understanding of the scratch mechanism of this orthopedic bearing component. | |||||
BibTeX:
@article{Bigerelle2013,
author = {Bigerelle, M. and Najjar, D. and Mathia, T. and Iost, A. and Coorevits, T. and Anselme, K.},
title = {An expert system to characterise the surfaces morphological properties according to their tribological functionalities: The relevance of a pair of roughness parameters},
booktitle = {ENERGY AND HEALTH},
journal = {Tribology International},
year = {2013},
volume = {59},
number = {0},
pages = {190--202},
url = {http://www.sciencedirect.com/science/article/pii/S0301679X1200151X}
}
|
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| Bohmler, J., Ponche, A., Anselme, K. and Ploux, L. | Self-Assembled Molecular Platforms for Bacteria/Material Biointerface Studies: Importance to Control Functional Group Accessibility | 2013 | Acs Applied Materials & Interfaces Vol. 5(21), pp. 10478-10488 |
article | DOI |
| Abstract: Highly controlled mixed molecular layers are crucial to study the role of material surface chemistry in biointerfaces, such as bacteria and subsequent biofilms interacting with biomaterials. Si lanes with non-nucleophilic functional groups are promising to form self-assembled monolayers (SAMs) due to their low sensitivity to sidereactions. Nevertheless, the real control of surface chemistry, layer structure, and organization has not been determined. Here, we report a comprehensive synthesis and analysis of undecyltrichlorosilane- and 11-bromoundecyltrichlorosilane-based mixed SAMs on silicon substrates. The impact of the experimental conditions on the control of surface chemistry, layer structure, and organization was investigated by combining survey and high-resolution X-ray photoelectron spectroscopy analysis, wettability measurements, and ellipsometry. The most appropriate conditions were first determined for elaborating highly reproducible, but easily made, pure 11-bromoundecyltrichlorosilane SAMs. We have demonstrated that the control is maintained on more complex surfaces, i.e., surfaces revealing various chemical densities, which were obtained with different ratios of undecyltrichlorosilane and 11-bromoundecyltrichlorosilane. The control is also maintained after bromine to amine group conversion via S(N)2 bromine-to-azide reactions. The appropriateness of such highly controlled amino- and methyl-group revealing platforms (NH2-X%/CH3) for biointerface studies was shown by the higher reproducibility of bacterial adhesion on NH2-100%/CH3 SAMs compared to bacterial adhesion on molecular layers of overall similar surface chemistry but less control at the molecular scale. | |||||
BibTeX:
@article{Bohmler2013,
author = {Bohmler, J. and Ponche, A. and Anselme, K. and Ploux, L.},
title = {Self-Assembled Molecular Platforms for Bacteria/Material Biointerface Studies: Importance to Control Functional Group Accessibility},
journal = {Acs Applied Materials & Interfaces},
year = {2013},
volume = {5},
number = {21},
pages = {10478--10488},
doi = {http://doi.org/10.1021/am401976g}
}
|
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| Bonde, S., Berthing, T., Madsen, M.H., Andersen, T.K., Buch-Manson, N., Guo, L., Li, X.M., Badique, F., Anselme, K., Nygard, J. and Martinez, K.L. | Tuning InAs Nanowire Density for HEK293 Cell Viability, Adhesion, and Morphology: Perspectives for Nanowire-Based Biosensors | 2013 | Acs Applied Materials & Interfaces Vol. 5(21), pp. 10510-10519 |
article | DOI |
| Abstract: Arrays of nanowires (NWs) are currently being established as vehicles for molecule delivery and electrical- and fluorescence-based platforms in the development of biosensors. It is conceivable that NW-based biosensors can be optimized through increased understanding of how the nanotopography influences the interfaced biological material. Using state-of-the-art homogenous NW arrays allow for a systematic investigation of how the broad range of NW densities used by the community influences cells. Here it is demonstrated that indium arsenide NW arrays provide a cell-promoting surface, which affects both cell division and focal adhesion up-regulation. Furthermore, a systematic variation in NW spacing affects both the detailed cell morphology and adhesion properties, where the latter can be predicted based on changes in free-energy states using the proposed theoretical model. As the NW density influences cellular parameters, such as cell size and adhesion tightness, it will be important to take NW density into consideration in the continued development of NW-based platforms for cellular applications, such as molecule delivery and electrical measurements. | |||||
BibTeX:
@article{Bonde2013,
author = {Bonde, S. and Berthing, T. and Madsen, M. H. and Andersen, T. K. and Buch-Manson, N. and Guo, L. and Li, X. M. and Badique, F. and Anselme, K. and Nygard, J. and Martinez, K. L.},
title = {Tuning InAs Nanowire Density for HEK293 Cell Viability, Adhesion, and Morphology: Perspectives for Nanowire-Based Biosensors},
journal = {Acs Applied Materials & Interfaces},
year = {2013},
volume = {5},
number = {21},
pages = {10510--10519},
doi = {http://doi.org/10.1021/am402070k}
}
|
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| Boukari, K., Duverger, E. and Sonnet, P. | Full DFT-D description of a nanoporous supramolecular network on a silicon surface | 2013 | Journal of Chemical Physics Vol. 138(8), pp. 084704 |
article | DOI |
| Abstract: We present a full density-functional-theory study taking into account the van der Waals interactions of a 2D supramolecular network adsorbed on the Si(111)root 3x root 3R30 degrees-boron surface denoted SiB. We show that, contrarily to the previous calculations [B. Baris, V. Luzet, E. Duverger, Ph. Sonnet, F. Palmino, and F. Cherioux, Angew. Chem., Int. Ed. 50, 4094 (2011)] molecule-molecule interactions are attractive, thanks to van der Waals corrections which are essential to describe such systems. We confirm the importance of the substrate effect to achieve the molecular network on the boron doped silicon surface without covalent bond. Our simulated STM images, calculated in the framework of the bSKAN code, give better agreement with the experimental STM images than those obtained by the integrated LDOS calculations within the Tersoff-Hamann approximation. The tungsten tip presence is essential to retrieve three paired lobes as observed experimentally. The observed protrusions arise from the phenyl arms located above silicon adatoms. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4792442] | |||||
BibTeX:
@article{Boukari2013,
author = {Boukari, K. and Duverger, E. and Sonnet, P.},
title = {Full DFT-D description of a nanoporous supramolecular network on a silicon surface},
journal = {Journal of Chemical Physics},
year = {2013},
volume = {138},
number = {8},
pages = {084704},
doi = {http://doi.org/10.1063/1.4792442}
}
|
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| Boutin, A., Bousquet, D., Ortiz, A.U., Coudert, F.-X., Fuchs, A.H., Ballandras, A., Weber, G., Bezverkhyy, I., Bellat, J.-P., Ortiz, G., Chaplais, G., Paillaud, J.-L., Marichal, C., Nouali, H. and Patarin, J. | Temperature-Induced Structural Transitions in the Gallium-Based MIL-53 Metal-Organic Framework | 2013 | J. Phys. Chem. C Vol. 117(16)The Journal of Physical Chemistry C, pp. 8180-8188 |
article | DOI URL |
| Abstract: We report a structural and thermodynamic investigation of the phase behavior of Ga(OH,F)-MIL-53, a gallium-based metal?organic framework (MOF) having the MIL-53 topology containing 0.7 wt % fluorine bonded to the metal. Despite some small structural differences, especially for the hydrated form, the overall physical chemistry behavior of Ga(OH,F)-MIL-53 is very similar to standard fluorine free Ga-MIL-53 material. A combination of in situ X-ray diffraction, in situ Fourier transform infrared spectroscopy, differential scanning calorimetry, and heat capacity measurements allowed us to establish that Ga(OH,F)-MIL-53 under vacuum (i.e., the empty material) exhibits two stable phases: a nonporous narrow-pore (np) phase favored at low temperature and a large-pore (lp) phase favored at high temperature, accompanied by a huge hysteresis effect. Structure determination of the hydrated material Ga(OH,F)-MIL-53_np_H2O obtained after synthesis, activation, and rehydration was also performed. Density functional theory calculations show that it is not a stable structure of Ga(OH,F)-MIL-53 in the absence of adsorbed water molecules. Instead, this hydrated structure is a swollen variant of the np phase, where the flexible framework has expanded to accommodate water molecules. We report a structural and thermodynamic investigation of the phase behavior of Ga(OH,F)-MIL-53, a gallium-based metal?organic framework (MOF) having the MIL-53 topology containing 0.7 wt % fluorine bonded to the metal. Despite some small structural differences, especially for the hydrated form, the overall physical chemistry behavior of Ga(OH,F)-MIL-53 is very similar to standard fluorine free Ga-MIL-53 material. A combination of in situ X-ray diffraction, in situ Fourier transform infrared spectroscopy, differential scanning calorimetry, and heat capacity measurements allowed us to establish that Ga(OH,F)-MIL-53 under vacuum (i.e., the empty material) exhibits two stable phases: a nonporous narrow-pore (np) phase favored at low temperature and a large-pore (lp) phase favored at high temperature, accompanied by a huge hysteresis effect. Structure determination of the hydrated material Ga(OH,F)-MIL-53_np_H2O obtained after synthesis, activation, and rehydration was also performed. Density functional theory calculations show that it is not a stable structure of Ga(OH,F)-MIL-53 in the absence of adsorbed water molecules. Instead, this hydrated structure is a swollen variant of the np phase, where the flexible framework has expanded to accommodate water molecules. | |||||
BibTeX:
@article{Boutin2013,
author = {Boutin, Anne and Bousquet, David and Ortiz, Aurélie U. and Coudert, François-Xavier and Fuchs, Alain H. and Ballandras, Anthony and Weber, Guy and Bezverkhyy, Igor and Bellat, Jean-Pierre and Ortiz, Guillaume and Chaplais, Gérald and Paillaud, Jean-Louis and Marichal, Claire and Nouali, Habiba and Patarin, Joël},
title = {Temperature-Induced Structural Transitions in the Gallium-Based MIL-53 Metal-Organic Framework},
booktitle = {The Journal of Physical Chemistry C},
journal = {J. Phys. Chem. C},
publisher = {American Chemical Society},
year = {2013},
volume = {117},
number = {16},
pages = {8180--8188},
url = {http://dx.doi.org/10.1021/jp312179e},
doi = {http://doi.org/10.1021/jp312179e}
}
|
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| Braghiroli, F., Fierro, V., Pizzi, A., Rode, K., Radke, W., Delmotte, L., Parmentier, J. and Celzard, A. | Reaction of condensed tannins with ammonia | 2013 | Industrial Crops and Products Vol. 44(0), pp. 330-335 |
article | URL |
| Abstract: Reaction of condensed (flavonoid) mimosa tannin extracts with concentrated aqueous ammonia has been investigated. For that purpose, catechin was also used as a flavonoid model compound and treated in similar conditions. Solid state CP-MAS 13C NMR and MALDI-ToF spectroscopy studies revealed that, unlike what was recently theorised, amination is not always regioselective and leading to the conversion of one single OH group in C4′ into NH2. In the present study, new reactions have been evidenced, clearly leading to multiamination of several phenolic hydroxyl groups, heterocycle opening, and oligomerisation and cross-linking through the formation of N bridges between flavonoid units. | |||||
BibTeX:
@article{Braghiroli2013,
author = {Braghiroli, F. and Fierro, V. and Pizzi, A. and Rode, K. and Radke, W. and Delmotte, L. and Parmentier, J. and Celzard, A.},
title = {Reaction of condensed tannins with ammonia},
journal = {Industrial Crops and Products},
year = {2013},
volume = {44},
number = {0},
pages = {330--335},
url = {http://www.sciencedirect.com/science/article/pii/S0926669012006139}
}
|
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| Brioude, M.D., Airoudj, A., Haidara, H., Roucoules, V. and Laborie, M.P. | Novel processes towards the self-assembly of cellulose nanowhiskers and polymers into microstructured nanocomposite thin films [BibTeX] |
2013 | Abstracts of Papers of the American Chemical Society Vol. 245(-), pp. - |
article | |
BibTeX:
@article{Brioude2013a,
author = {Brioude, M. D. and Airoudj, A. and Haidara, H. and Roucoules, V. and Laborie, M. P.},
title = {Novel processes towards the self-assembly of cellulose nanowhiskers and polymers into microstructured nanocomposite thin films},
journal = {Abstracts of Papers of the American Chemical Society},
year = {2013},
volume = {245},
number = {-},
pages = {-}
}
|
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| Buchwalter, P., Rosé, J., Lebeau, B., Ersen, O., Girleanu, M., Rabu, P., Braustien, P. and Paillaud, J...L. | Characterization of cobalt phosphide nanoparticles derived form molecular clusters in mesoporous silica | 2013 | J. Nanopart. Res Vol. -, pp. 21 pages |
article | DOI |
| Abstract: The synthesis of well dispersed cobalt phosphide nanoparticles (NPs) in SBA-15 mesoporous silica by wet impregnation of the molecular cluster [Co4(CO)10(l-dppa)] (1) (dppa = HN(PPh2)2) is described. The thermal activation of the silica impregnated precursor under a H2/N2 (5/95 %) stream at different temperatures to form NPs was studied and it was found that the size of the latter is limited in the 5.5–6.5 nm range by the size of the pores. The obtained materials were characterized by various analytical methods. The porosity and the structure of the mesoporous silica supports were analyzed by N2 adsorption/desorption and small-angle X-ray diffraction. The nanoparticles were characterized by wideangle X-ray diffraction, transmission electron microscopy in conventional and scanning modes, electron tomography, energy-dispersive X-ray spectroscopy, and magnetic measurements. Cobalt phosphide NPs of few nanometers were observed in the pores of SBA-15. | |||||
BibTeX:
@article{Buchwalter2013a,
author = {Buchwalter, P. and Rosé, J. and Lebeau, B. and Ersen, O. and Girleanu, M. and Rabu, P. and Braustien, P. and Paillaud, J. . L.},
title = {Characterization of cobalt phosphide nanoparticles derived form molecular clusters in mesoporous silica},
journal = {J. Nanopart. Res},
year = {2013},
volume = {-},
pages = {21 pages},
doi = {http://doi.org/10.1007/s11051-013-2132-1}
}
|
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| Buruiana, E.C., Chibac, A.L., Buruiana, T., Melinte, V. and Balan, L. | A benzophenone-bearing acid oligodimethacrylate and its application to the preparation of silver/gold nanoparticles/polymer nanocomposites | 2013 | Journal of Nanoparticle Research Vol. 15(1), pp. 1335 |
article | DOI |
| Abstract: The synthesis of photosensitive urethane dimethacrylate that contains poly(ethylene oxide) sequence (PEG, M-w: 400), carboxylic and benzophenone moieties, and its characterization by specific methods (H-1 and C-13 NMR, FTIR, UV and electro-spray ionization-mass spectroscopy) are reported. UV curing parameters of this macromer (BP-UDMA) alone and in monomer combinations was evaluated through FTIR spectroscopy and photo-differential scanning calorimetry using 1 wt% 4-(dimethylamino)phenylacetic acid as co-initiator or Irgacure 819 (Irg819). The results show that the photopolymerization rates of the BP-UDMA are higher in the case of Irg819 (R-max(P) : 0.108 s(-1)) due to its synergic action, whereas the degree of conversion of C=C double bond (DC, after 120 s of UV irradiation) is over 77 %. When other co-monomers (non-acid urethane dimethacrylate and silyl urea methacrylate) are incorporated into the formulation, the photopolymerization rate (0.095-0.132 s(-1)) and DC (84.59-79.69 %) varied in reasonable limits. Depending of the photoinitiator type, as well as the monomer composition, the addition of 0.5, 1 and 3 wt% noble metal precursors (AgNO3 and AuBr3) led to the formation of hybrid composites with in situ-synthesized nanoparticles (NPs), where the variations in the intensity of the surface plasmon absorption bands appeared in the range 400-456 nm (Silver) or 500-553 nm (Gold), better results being obtained in the first initiating system. Homogeneous dispersion of nanoparticles into the polymer matrix was evidenced by EDX and TEM analysis, the last proving the existence of nanoparticles with sizes around 10 nm and variable morphologies. X-ray diffraction analysis complemented these results. | |||||
BibTeX:
@article{Buruiana2013,
author = {Buruiana, E. C. and Chibac, A. L. and Buruiana, T. and Melinte, V. and Balan, L.},
title = {A benzophenone-bearing acid oligodimethacrylate and its application to the preparation of silver/gold nanoparticles/polymer nanocomposites},
journal = {Journal of Nanoparticle Research},
year = {2013},
volume = {15},
number = {1},
pages = {1335},
doi = {http://doi.org/10.1007/s11051-012-1335-1}
}
|
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| Campos, D.M., Soares, G.A. and Anselme, K. | Role of culture conditions on in vitro transformation and cellular colonization of biomimetic HA-Col scaffolds | 2013 | biomatter Vol. 3(2159-2527), pp. e24922- |
article | URL |
| Abstract: We have recently developed new 3D hydroxyapatite/collagen (50/50 wt%) scaffolds using a biomimetic synthesis approach. The first in vitro tests performed in static culture showed a limited cell colonization and survival inside the scaffolds. The current study evaluated in dynamic culture the scaffold changes and colonization by human immortalized osteoprogenitor STRO-1A cells. The stability of our scaffolds in the different culture conditions (static, low flow, high flow) was validated by the maintenance of the pore diameter and interconnectivity over 21 d. The colonization and the viability of STRO-1A cells inside the scaffolds were further evaluated on histological sections. It was demonstrated that only the high flow-rate allowed cell survival after 7 d and a complete scaffold colonization. Moreover, the colonization and viability were different in function of the scaffold position inside the perfusion container. The differentiation markers (alkaline phosphatase activity, type I procollagen and osteocalcin synthesis) of STRO-1A cells were analyzed in the culture medium after 7, 14 and 21 d. The low flow-rate increased significantly the three markers compared with static conditions. In contrast, markers were reduced in high flow-rate compared with low flow-rate. To explain this surprising result, we hypothesized that the different molecules were actually adsorbed on the scaffold because of the closed circuit used in the high flow-rate conditions. In summary, this study provides original results on the influence of flow rate but mostly of the circuit used (open/closed) on the structural modifications and cell colonization of collagen-HA scaffolds. | |||||
BibTeX:
@article{Campos2013,
author = {Campos, Doris M. and Soares, Gloria A. and Anselme, Karine},
title = {Role of culture conditions on in vitro transformation and cellular colonization of biomimetic HA-Col scaffolds},
journal = {biomatter},
publisher = {Landes Bioscience Inc.},
year = {2013},
volume = {3},
number = {2159-2527},
pages = {e24922--},
url = {http://www.landesbioscience.com/journals/biomatter/article/24922/}
}
|
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| Chemmi, A., Brendle, J., Marichal, C. and Lebeau, B. | A Novel Fluoride Route for the Synthesis of Aluminosilicate Nanotubes | 2013 | Nanomaterials Vol. 3(1), pp. 117-125 |
article | |
| Abstract: In this work we present a novel method for synthesis of aluminosilicate nanotubes: the fluoride route. F-containing imogolite (F-IMO) exhibits an improved crystallization rate and improved yield. The structure of F-IMO was investigated and compared with F-free imogolite (IMO) by means of X-ray diffraction (XRD) and Fourier transformed infrared spectroscopy (FTIR) confirming imogolite structure. Solid state nuclear magnetic resonance (NMR) analyses show an increased crystallization rate for F-IMO and confirm the incorporation of fluorine ion in the structure. | |||||
BibTeX:
@article{Chemmi2013,
author = {Chemmi, A. and Brendle, J. and Marichal, C. and Lebeau, B.},
title = {A Novel Fluoride Route for the Synthesis of Aluminosilicate Nanotubes},
journal = {Nanomaterials},
year = {2013},
volume = {3},
number = {1},
pages = {117-125}
}
|
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| Cosseron, A.-F., Daou, J., Tzanis, L., Nouali, H., Deroche, I., Coasne, B. and Tchamber, V. | Adsorption of Volatile Organic Compounds in pure silica CHA, ∗BEA, MFI and STT-type zeolites | 2013 | Microporous and Mesoporous Materials Vol. 173(0), pp. 147-154 |
article | URL |
| Abstract: Four pure silica zeolites, chabazite (CHA-structure type) and SSZ-23 (STT-structure type) with cage-like structure and silicalite-1 (MFI-structure type) and beta (∗BEA-structure type) with channel structure, were synthesized and fully characterized. Their sorption properties were examined using gravimetric method combined with Grand Canonical Monte Carlo simulations (GCMC). Of particular interest is the large difference in the adsorption rates of n-hexane, p-xylene and acetone observed for these zeosils at 25 °C, 75 °C and 150 °C. As expected, in most cases, a decrease in the adsorption capacity is observed with increasing the molar volume of the used probe molecule and the temperature. An exception is observed for the pure silica CHA-type zeolite due to its small pore size which prevents molecules from entering its porosity. However, at higher temperature, the window size widens slightly and allows n-hexane and acetone, which have kinetic diameter close to the pore opening, to enter easily in chabazite. As a result, for this zeosil, an increase in the adsorption capacity compared to that obtained at 25 °C is observed. All these zeosils are promising for technological uses in car exhaust gas decontamination. | |||||
BibTeX:
@article{Cosseron2013,
author = {Cosseron, A-F. and Daou, J. and Tzanis, L. and Nouali, H. and Deroche, I. and Coasne, B. and Tchamber, V.},
title = {Adsorption of Volatile Organic Compounds in pure silica CHA, ∗BEA, MFI and STT-type zeolites},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {173},
number = {0},
pages = {147-154},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113000759}
}
|
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| Daou, J., Boltz, M., Tzanis, L., Michelin, L. and Louis, B. | Gas-phase chlorination of aromatics over FAU- and EMT-type zeolites | 2013 | Catalysis Communications Vol. 39(0), pp. 10-13 |
article | URL |
| Abstract: Abstract Three FAU-structure type zeolites (EMC-1, USY and USY without EFAl) with different Si/Al molar ratio and their pure hexagonal analogue, the EMC-2 zeolite (EMT-structure type) were prepared and thoroughly characterized. Their catalytic properties were examined in the non-conventional gas-solid reaction requiring a strong acidity. A deeper focus was paid to the difference in activity/selectivity of these zeolites toward the continuous chlorination of aromatics (nitrobenzene and toluene) using trichloroisocyanuric acid (TCCA, C3N3O3Cl3) as chlorination agent. | |||||
BibTeX:
@article{Daou2013,
author = {Daou, Jean and Boltz, Marilyne and Tzanis, Lydie and Michelin, Laure and Louis, Benoit},
title = {Gas-phase chlorination of aromatics over FAU- and EMT-type zeolites},
journal = {Catalysis Communications},
year = {2013},
volume = {39},
number = {0},
pages = {10--13},
url = {http://www.sciencedirect.com/science/article/pii/S1566736713001647}
}
|
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| Daou, J., Lauridant, N., Arnold, G., Josien, L., Faye, D. and Patarin, J. | Synthesis of MFI/EMT zeolite bi-layer films for molecular decontamination | 2013 | Chemical Engineering Journal Vol. 234(0), pp. 66-73 |
article | URL |
| Abstract: Abstract A bi-layer film composed of a thick layer of ZSM-5 zeolite (MFI-structure type) and a thin layer of EMC-2 zeolite (EMT-structure type) was synthesized on aluminum alloys that are used widely in aerospace industry. The bottom MFI layer was obtained by direct hydrothermal synthesis while secondary growth method was used for the top EMC-2 layer. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results revealed that both layers are highly crystallized and uniform with a total film thickness around 22 μm. Nitrogen sorption measurements indicated that ZSM-5 and EMC-1 layers present an accessible porosity. The high micropore volumes lead to considerably good adsorption properties towards pollutants. Such a result was confirmed by the n-hexane sorption capacity of the bi-layer film which is identical to what is expected for a corresponding powder mixture. Adhesion of zeolite films on aluminum substrate was investigated by scratch tests which highlighted a good adhesion between the bottom layer and the support as well as between the two zeolite layers. This bi-layer film is promising for technological uses in molecular decontamination. | |||||
BibTeX:
@article{Daou2013a,
author = {Daou, Jean and Lauridant, Natacha and Arnold, Gilles and Josien, Ludovic and Faye, Delphine and Patarin, Joël},
title = {Synthesis of MFI/EMT zeolite bi-layer films for molecular decontamination},
journal = {Chemical Engineering Journal},
year = {2013},
volume = {234},
number = {0},
pages = {66--73},
url = {http://www.sciencedirect.com/science/article/pii/S138589471301156X}
}
|
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| Déon, S., Dutournié, P., Fievet, P., Limousy, L. and Bourseau, P. | Concentration polarization phenomenon during the nanofiltration of multi-ionic solutions: Influence of the filtrated solution and operating conditions | 2013 | Water Research Vol. 47(7), pp. 2260-2272 |
article | URL |
| Abstract: One of the major difficulties for the prediction of separation performances in the case of multi-ionic mixtures nanofiltration lies in the description of the concentration polarization phenomenon. Usual models available in literature do not take account of the polarization phenomenon or only describe it cursorily. Very few studies dedicated to the understanding and the specific description of the concentration polarization phenomenon are available in literature and a 2-D multi-ionic model describing the layer heterogeneity along the membrane length has never been proposed yet. The model used in the present work, called Pore and Polarization Transport Model (PPTM), allows an accurate description of the concentration polarization layer occurring during the filtration of multi-ionic solutions by taking account of the radial electromigrative transport in the layer, the turbulence, as well as the axial heterogeneity. | |||||
BibTeX:
@article{Deon2013,
author = {Déon, Sébastien and Dutournié, Patrick and Fievet, Patrick and Limousy, Lionel and Bourseau, Patrick},
title = {Concentration polarization phenomenon during the nanofiltration of multi-ionic solutions: Influence of the filtrated solution and operating conditions},
journal = {Water Research},
year = {2013},
volume = {47},
number = {7},
pages = {2260--2272},
url = {http://www.sciencedirect.com/science/article/pii/S0043135413000742}
}
|
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| De Paz-Simon, H., Chemtob, A., Croutxe-Barghorn, C., Rigolet, S., Michelin, L., Vidal, L. and Lebeau, B. | Block Copolymer Self-Assembly in Mesostructured Silica Films Revealed by Real-Time FTIR and Solid-State NMR | 2013 | Langmuir Vol. 29(6), pp. 1963-1969 |
article | DOI |
| Abstract: Over the past ten years, understanding the self-assembly process within mesostructured silica films has been a major concern. Our characterization approach relies on two powerful and complementary techniques: in situ time-resolved FTIR spectroscopy and ex situ solid-state NMR. As model systems, three silica/surfactant films displaying various degrees of mesostructuration were synthesized using an amphiphilic block copolymer (PEO-b-PPO-b-PEO) via a UV light induced self-assembly process. The key idea is that the hydration state of the hydrophobic PPO chain is expected to be different depending upon whether the sample is amorphous (blend) or mesostructured (segregated). With real-time FTIR experiments, we show that the methyl deformation mode can act as a signature for the PPO microenvironment so as to trace the progressive copolymer self-association throughout the irradiation time. In H-1 solid-state NMR, the dependence of the H-1 chemical shift on the PPO hydration state has been exploited to evidence the extent of mesostructuration. | |||||
BibTeX:
@article{DePaz-Simon2013,
author = {De Paz-Simon, H. and Chemtob, A. and Croutxe-Barghorn, C. and Rigolet, S. and Michelin, L. and Vidal, L. and Lebeau, B.},
title = {Block Copolymer Self-Assembly in Mesostructured Silica Films Revealed by Real-Time FTIR and Solid-State NMR},
journal = {Langmuir},
year = {2013},
volume = {29},
number = {6},
pages = {1963--1969},
doi = {http://doi.org/10.1021/la3030759}
}
|
|||||
| Derible, A., Becht, J.M. and Le Drian, C. | Mizoroki-Heck reactions of methyl acrylate in presence of a palladated rasta resin | 2013 | Tetrahedron Letters Vol. 54(32), pp. 4207-4209 |
article | DOI |
| Abstract: Mizoroki-Heck cross-couplings of aryl halides in the presence of a palladium catalyst supported on a rasta resin bearing diphenylphosphanyl ligands are reported. In particular, we show that tiny amounts of soluble palladium species leached from the polymeric support catalyze the reaction. A one-pot two steps preparation of alkenes from aryl bromides using a Finkelstein halogen exchange reaction is also described. (C) 2013 Elsevier Ltd. All rights reserved. | |||||
BibTeX:
@article{Derible2013,
author = {Derible, A. and Becht, J. M. and Le Drian, C.},
title = {Mizoroki-Heck reactions of methyl acrylate in presence of a palladated rasta resin},
journal = {Tetrahedron Letters},
year = {2013},
volume = {54},
number = {32},
pages = {4207--4209},
doi = {http://doi.org/10.1016/j.tetlet.2013.05.128}
}
|
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| Dhainaut, J., Daou, J., Bats, N., Harbuzaru, B., Lapisardi, G., Rouleau, L. and Patarin, J. | The influence of l-lysine and PDADMA on the crystal size and porosity of zeolite Y material | 2013 | Microporous and Mesoporous Materials Vol. 170(0), pp. 346-351 |
article | URL |
| Abstract: The influence of l-lysine, one of the most basic amino acids, and poly(diallyldimethylammonium) (PDADMA) poly(cations) with different molecular weights on the zeolite Y crystal size and porosity was evaluated by using a high-throughput experiment (HTE) approach, allowing the exploration of a wide range of organic compound concentrations under the same experimental conditions. Depending on their nature and molecular weight, the increased concentration of these organic compounds into the synthesis gel gradually delays the crystallization of the zeolite Y. An intermediate molar content of the amino acid (1 l-lysine:9 SiO2) led to slight decrease of the crystallization rate and a significant reduction of the crystal size down to 300 nm. Thus, the l-lysine is assumed to act as a growth inhibitor. The addition of poly(cations) to the synthesis gel results in the creation of silica-rich mesoporous particles forming aggregates. The PDADMA is mainly located in the silica-rich particles and favor their formation along with their mesoporosity. The larger crystal size is attributed to the inhibition of the nucleation process by the poly(cations). | |||||
BibTeX:
@article{Dhainaut2013,
author = {Dhainaut, Jérémy and Daou, Jean and Bats, Nicolas and Harbuzaru, Bogdan and Lapisardi, Grégory and Rouleau, Loic and Patarin, Joël},
title = {The influence of l-lysine and PDADMA on the crystal size and porosity of zeolite Y material},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {170},
number = {0},
pages = {346--351},
url = {http://www.sciencedirect.com/science/article/pii/S1387181112007329}
}
|
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| Dhainaut, J., Daou, J., Bidal, Y., Bats, N., Harbuzaru, B., Lapisardi, G., Chaumeil, H., Defoin, A., Rouleau, L. and Patarin, J. | One-pot structural conversion of magadiite into MFI zeolite nanosheets using mononitrogen surfactants as structure and shape-directing agents | 2013 | CrystEngComm Vol. 15(15), pp. 3009-3015 |
article | URL |
| Abstract: MFI-type materials with a lamellar morphology were successfully synthesized by using mononitrogen surfactants specifically designed by molecular modelling. The mononitrogen surfactants directed the recrystallization of a crystalline layered polysilicate formed in situ, the magadiite, into a zeolite ZSM-5. Moreover, the surfactants allow the preservation of the lamellar shape of the magadiite and inhibit a further growth into one dimension, leading to the formation of zeolite ZSM-5 nanosheets with a thickness comprised between 2 and 3 nm and a Si/Al ratio of 24. This simple approach paves a new way for obtaining zeolite materials of controlled size and shape for specific catalytic applications. | |||||
BibTeX:
@article{Dhainaut2013a,
author = {Dhainaut, Jeremy and Daou, Jean and Bidal, Yannick and Bats, Nicolas and Harbuzaru, Bogdan and Lapisardi, Gregory and Chaumeil, Helene and Defoin, Albert and Rouleau, Loic and Patarin, Joel},
title = {One-pot structural conversion of magadiite into MFI zeolite nanosheets using mononitrogen surfactants as structure and shape-directing agents},
journal = {CrystEngComm},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {15},
number = {15},
pages = {3009--3015},
url = {http://dx.doi.org/10.1039/C3CE40118A}
}
|
|||||
| Dhainaut, J., Daou, J., Chappaz, A., Bats, N., Harbuzaru, B., Lapisardi, G., Chaumeil, H., Defoin, A., Rouleau, L. and Patarin, J. | Synthesis of FAU and EMT-type zeolites using structure-directing agents specifically designed by molecular modelling | 2013 | Microporous and Mesoporous Materials Vol. 174(0), pp. 117-125 |
article | DOI URL |
| Abstract: Abstract Molecular modelling is a growing science which allows to calculate short range forces between zeolite frameworks and organic compounds. By using a steric approach, it is possible to design templates matching closely with an inorganic framework. Herein, the design, synthesis and successful application of several di(azacrown ether) templates to direct the formation of FAU- and EMT-type zeolites are reported. Following a high throughput experiment design, the synthesis gel composition was optimized to obtain well-crystallized materials. Taking into account their respective crystallization rates, their textural and morphological properties were comparable to their counterparts, typically structured by 15-crown-5 and 18-crown-6 ethers. This work is the first step toward a further design of structure- and shape-directing templates, in order to control the properties of FAU- and EMT-type zeolites aiming specific catalytic and separation applications. | |||||
BibTeX:
@article{Dhainaut2013b,
author = {Dhainaut, J. and Daou, J. and Chappaz, A. and Bats, N. and Harbuzaru, B. and Lapisardi, G. and Chaumeil, H. and Defoin, A. and Rouleau, L. and Patarin, J.},
title = {Synthesis of FAU and EMT-type zeolites using structure-directing agents specifically designed by molecular modelling},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {174},
number = {0},
pages = {117-125},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113001261},
doi = {http://doi.org/10.1016/j.micromeso.2013.03.006}
}
|
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| Dibandjo, P., Zlotea, C., Gadiou, R., Ghimbeu Camelia Matei, C., Cuevas, F., Latroche, M., Leroy, E. and Vix-Guterl, C. | Hydrogen storage in hybrid nanostructured carbon/palladium materials: Influence of particle size and surface chemistry | 2013 | International Journal of Hydrogen Energy Vol. 38(2), pp. 952-965 |
article | URL |
| Abstract: Hydrogen adsorption on porous materials is one of the possible methods proposed for hydrogen storage for transport applications. One way for increasing adsorption at room temperature is the inclusion of metal nanoparticles to increase hydrogen-surface interactions. In this study, ordered mesoporous carbon materials were synthesized by replication of nanostructured mesoporous SBA-15 silica. The combination of different carbon precursors allowed to tailor the textural, structural and chemical properties of the materials. These carbons were used for the synthesis of hybrid nanostructured carbon/palladium materials with different sizes of metal nanoparticles. The hydrogen sorption isotherms were measured at 77 K and 298 K between 0.1 and 8 MPa. Hydrogen storage capacities strongly correlate with the textural properties of the carbon at 77 K. At room temperature, Pd nanoparticles enhance hydrogen storage capacity by reversible formation of hydride PdHx and through the spillover mechanism. The hydrogen uptake depends on the combined influences of metal particle size and of carbon chemical properties. Carbons obtained from sucrose precursors lead to the hybrid materials with the highest storage capacities since they exhibits a large microporous volume and a high density of oxygenated surface groups. | |||||
BibTeX:
@article{Dibandjo2013,
author = {Dibandjo, Philippe and Zlotea, Claudia and Gadiou, Roger and Ghimbeu, Camelia Matei, Camelia and Cuevas, Fermin and Latroche, Michel and Leroy, Eric and Vix-Guterl, Cathie},
title = {Hydrogen storage in hybrid nanostructured carbon/palladium materials: Influence of particle size and surface chemistry},
journal = {International Journal of Hydrogen Energy},
year = {2013},
volume = {38},
number = {2},
pages = {952--965},
url = {http://www.sciencedirect.com/science/article/pii/S0360319912023385}
}
|
|||||
| Diebold, C., Derible, A., Becht, J.-M. and Le Drian, C. | A simple and efficient reusable polystyrene-supported palladium catalyst for Hiyama cross-coupling | 2013 | Tetrahedron Vol. 69(1), pp. 264-267 |
article | URL |
| Abstract: An efficient synthesis of biaryls using a Hiyama reaction between aryl iodides and aryltrialkoxysilanes in the presence of a diphenylphosphinomethylpolystyrene-supported palladium catalyst is described. The cross-coupling proceeds in the presence of only 0.1 mol % of supported palladium. The catalyst can be used at least four times and the palladium leaching is extremely low (ca. 1% of the initial amount). | |||||
BibTeX:
@article{Diebold2013,
author = {Diebold, Carine and Derible, Antoine and Becht, Jean-Michel and Le Drian, Claude},
title = {A simple and efficient reusable polystyrene-supported palladium catalyst for Hiyama cross-coupling},
journal = {Tetrahedron},
year = {2013},
volume = {69},
number = {1},
pages = {264--267},
url = {http://www.sciencedirect.com/science/article/pii/S0040402012015839}
}
|
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| Ducruet, N., Delmotte, L., Schrodj, G., Stankiewicz, F., Desgardin, N., Vallat, M.F. and Haidar, B. | Evaluation of Hydroxyl Terminated Polybutadiene-Isophorone Diisocyanate Gel Formation During Crosslinking Process | 2013 | Journal of Applied Polymer Science Vol. 128(1), pp. 436-443 |
article | DOI |
| Abstract: Crosslinking reaction of hydroxyl-terminated polybutadiene (HTPB)/isophorone di-isocyanate (IPDI) was monitored by infrared spectroscopy, dynamic mechanical analysis (DMA), swelling measurements, and by relaxation time (T-2) measurements obtained by low-field NMR technique. Chemical reaction monitored by FTIR shows that urethane bonds were predominantly formed throughout the whole reaction period while DMA and swelling became only effective once the three-dimensional network was formed. NMR results allow differentiating between relaxation-processes associated with different fractions of the reactants in the mixture prior to the network formation. The most important finding in this study is that two of the relaxation processes were found to decline whereas a new fraction with a short relaxation time which emerged specifically at an early stage of reaction and progressed along with advancement of the reaction. All results pointed out to a change in the mixture behavior around 30 h of crosslinking reaction at 60 degrees C, reflecting an important restriction in molecules diffusion and mobilities which were attributed to the gel point formation. (C) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 128: 436-443, 2013 | |||||
BibTeX:
@article{Ducruet2013,
author = {Ducruet, N. and Delmotte, L. and Schrodj, G. and Stankiewicz, F. and Desgardin, N. and Vallat, M. F. and Haidar, B.},
title = {Evaluation of Hydroxyl Terminated Polybutadiene-Isophorone Diisocyanate Gel Formation During Crosslinking Process},
journal = {Journal of Applied Polymer Science},
year = {2013},
volume = {128},
number = {1},
pages = {436--443},
doi = {http://doi.org/10.1002/app.38194}
}
|
|||||
| Dumas, A., Martin, F., Le Roux, C., Micoud, P., Petit, S., Ferrage, E., Brendle, J., Grauby, O. and Greenhill-Hooper, M. | Phyllosilicates synthesis: a way of accessing edges contributions in NMR and FTIR spectroscopies. Example of synthetic talc | 2013 | Physics and Chemistry of Minerals Vol. 40(4), pp. 361-373 |
article | DOI |
| Abstract: A series of new-generation synthetic talcs were prepared by varying the hydrothermal synthesis duration from a few hours up to 2 months. Crystallinity and particle size analysis of the synthetic products were evaluated by photon correlation spectroscopy, transmission electron microscopy, differential thermal analysis and unoriented X-ray diffraction, and then analyzed by various spectroscopic methods such as Fourier transformed infrared spectroscopy and solid-state H-1 and Si-29 magic angle spinning nuclear magnetic resonance. The new process for preparing synthetic talcs allows to obtain single-phased particles which after few hours grow heterogeneously and simultaneously in both the c* direction and the (ab) plan. Fine particles, observed for whatever the synthesis duration, lead to the presence of numerous sheet edges surfaces due to particle size which represents the main difference with natural talc. Spectroscopy data show the influence of the fine particles on signals and highlight that synthetic talc characterization is a potential tool for better understanding crystal chemistry of natural talc. | |||||
BibTeX:
@article{Dumas2013,
author = {Dumas, A. and Martin, F. and Le Roux, C. and Micoud, P. and Petit, S. and Ferrage, E. and Brendle, J. and Grauby, O. and Greenhill-Hooper, M.},
title = {Phyllosilicates synthesis: a way of accessing edges contributions in NMR and FTIR spectroscopies. Example of synthetic talc},
journal = {Physics and Chemistry of Minerals},
year = {2013},
volume = {40},
number = {4},
pages = {361--373},
doi = {http://doi.org/10.1007/s00269-013-0577-5}
}
|
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| Dumur, F., Lepeltier, M., Graff, B., Contal, E., Wantz, G., Lalevee, J., Mayer, C.R., Bertin, D. and Gigmes, D. | Blue and blue-green PhOLEDs prepared with neutral heteroleptic iridium(III) complexes comprising substituted pyridine-1,2,4-triazoles as the ancillary ligands | 2013 | Synthetic Metals Vol. 182, pp. 13-21 |
article | DOI |
| Abstract: Two neutral heteroleptic iridium(III) complexes bearing substituted pyridine 1,2,4-triazoles as the ancillary ligands have been designed and investigated as emitters for PhOLEDs. Interestingly, blue and blue-green devices were obtained with the two complexes. Best devices were obtained with C-1 and reached a maximum brightness of 10,200 cd/m(2), a current efficiency of 4.3 cd/A at an operation voltage of 7.9 V while exhibiting the unusual low turn-on voltage of only 2.8 V. UV-visible absorption and photoluminescence spectroscopy as well as the cyclic voltammetry of the two iridium(III) complexes were also investigated. (C) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Dumur2013,
author = {Dumur, F. and Lepeltier, M. and Graff, B. and Contal, E. and Wantz, G. and Lalevee, J. and Mayer, C. R. and Bertin, D. and Gigmes, D.},
title = {Blue and blue-green PhOLEDs prepared with neutral heteroleptic iridium(III) complexes comprising substituted pyridine-1,2,4-triazoles as the ancillary ligands},
journal = {Synthetic Metals},
year = {2013},
volume = {182},
pages = {13--21},
doi = {http://doi.org/10.1016/j.synthmet.2013.07.009}
}
|
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| Durimel, A., Altenor, S., Miranda-Quintana, R., Couespel Du Mesnil, P., Jauregui-Haza, U., Gadiou, R. and Gaspard, S. | pH dependence of chlordecone adsorption on activated carbons and role of adsorbent physico-chemical properties | 2013 | Chemical Engineering Journal Vol. 229(0), pp. 239-249 |
article | URL |
| Abstract: Abstract From the 1960s to the 1990s, the large-scale production of banana in the French West Indies required an intensive use of chlorinated pesticides, such as chlordecone (Kepone), resulting in the diffuse contamination of soil and surface waters in the banana-producing areas. For this reason, drinking water plants were equipped with filters containing commercial activated carbons, being one of the challenges to find local adsorbents for the sustainable management of water treatment plants. In this paper, the adsorption of chlordecone (CLD) on activated carbons (ACs) prepared from sugar cane bagasse is studied, aiming to understand the mechanism of CLD adsorption on the AC surface. First, textural, acido-basic and chemical characteristics of the ACs were determined by thermal desorption, X-ray photoelectron and Boëhm studies. Adsorption isotherms of CLD show that the adsorption capacity increases with the amount of carbon and acidic groups at the AC surface whereas basic groups, hydroxyl and ether groups are detrimental to adsorption. The adsorption capacity is maximized at a solution pH level equal to the pHpzc of the considered AC. From Temperature programmed desorption studies, it is proposed that chlordecone adsorption mechanism onto ACs is mainly governed by interaction with carboxylic groups. These results were correlated to molecular modeling studies of CLD interactions with surface functional groups of AC. The models of preferential positions, corresponding to minimal value of association energy, of interactions between CLD and AC functional groups were obtained. | |||||
BibTeX:
@article{Durimel2013,
author = {Durimel, A. and Altenor, S. and Miranda-Quintana, R. and Couespel Du Mesnil, P. and Jauregui-Haza, U. and Gadiou, R. and Gaspard, S.},
title = {pH dependence of chlordecone adsorption on activated carbons and role of adsorbent physico-chemical properties},
journal = {Chemical Engineering Journal},
year = {2013},
volume = {229},
number = {0},
pages = {239-249},
url = {http://www.sciencedirect.com/science/article/pii/S1385894713003604}
}
|
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| El may, Y., Jeguirim, M., Dorge, S., Trouvé, G. and Said, R. | Experimental investigation on gaseous emissions from the combustion of date palm residues in laboratory scale furnace | 2013 | Bioresource Technology Vol. 131(0), pp. 94-100 |
article | URL |
| Abstract: Emissions characteristics from the combustion of five date palm residues, DPR, (Date Palm Leaflets, Date Palm Rachis, Date Palm Trunk, Date Stones and fruitstalk prunings) in a laboratory scale furnace were investigated. Release of gaseous products such as CO2, CO, VOC, NOx and SO2 were measured at 600-800 °C. The main goal was to analyze thermal behaviors and gaseous emissions in order to select the most convenient biofuel for an application in domestic boiler installations. Regards to biofuel characteristics, date stone have the highest energy density (11.4 GJ/m3) and the lowest ash content (close to 1.2%). Combustion tests show that among the tested date palm residues, date stone may be the promising biofuel for the design of combustion processing system. However, a special attention to the design of the secondary air supply should be given to prevent high emissions of CO and volatile matters. | |||||
BibTeX:
@article{Elmay2013,
author = {El may, Yassine and Jeguirim, Mejdi and Dorge, Sophie and Trouvé, Gwenaelle and Said, Rachid},
title = {Experimental investigation on gaseous emissions from the combustion of date palm residues in laboratory scale furnace},
journal = {Bioresource Technology},
year = {2013},
volume = {131},
number = {0},
pages = {94--100},
url = {http://www.sciencedirect.com/science/article/pii/S0960852412019785}
}
|
|||||
| Elmay, Y., Trouvé, G., Jeguirim, M. and Said, R. | Energy recovery of date palm residues in a domestic pellet boiler | 2013 | Fuel Processing Technology Vol. 112(0), pp. 12-18 |
article | URL |
| Abstract: Abstract This work presents a preliminary study on the energy recovery of two date palm residues (date stone and date rachis) provided from Tunisia. Rachis residues were transformed into pellets while date stones were used as received. Physicochemical characteristics such as ultimate and proximate analyses and calorific values were determined. Date palm residues were combusted in a domestic pellet boiler according to European EN 303-5 standard. High calorific values of both residues as well as combustion efficiencies close to 80% obtained during combustion tests indicate that these residues are a promising alternative to produce renewable energy in Tunisia. Further adjustments (airflow and fuel feed rates) are necessary to improve boiler efficiencies. High air excess were observed and consequently cooled down the fume temperature. | |||||
BibTeX:
@article{Elmay2013a,
author = {Elmay, Yassine and Trouvé, Gwenäelle and Jeguirim, Mejdi and Said, Rachid},
title = {Energy recovery of date palm residues in a domestic pellet boiler},
journal = {Fuel Processing Technology},
year = {2013},
volume = {112},
number = {0},
pages = {12--18},
url = {http://www.sciencedirect.com/science/article/pii/S0378382013000854}
}
|
|||||
| Evstigneev, M., Mougin, K. and Reimann, P. | Modeling of nanoparticle manipulation by AFM: Rolling vs. sliding regimes | 2013 | Epl Vol. 101(6), pp. 66002 |
article | DOI |
| Abstract: We theoretically model the manipulation of a nanorod by an atomic force microscope (AFM), aiming at the determination of its sliding or rolling regimes of motion. It is found that, for contact-mode manipulation, rolling requires simultaneous fulfilment of several conditions. Namely, the corrugation of the substrate potential must be sufficiently high to overcome the effects of the particle adhesion to the substrate and to the tip. On the other hand, the corrugation of the tip potential should be relatively low to allow the particle corners to slide against the tip surface as the particle rotates. Furthermore, only sliding is possible if the tip opening angle or its radius of curvature exceed some critical values determined by the geometry of the particle cross-section. Copyright (C) EPLA, 2013 | |||||
BibTeX:
@article{Evstigneev2013,
author = {Evstigneev, M. and Mougin, K. and Reimann, P.},
title = {Modeling of nanoparticle manipulation by AFM: Rolling vs. sliding regimes},
journal = {Epl},
year = {2013},
volume = {101},
number = {6},
pages = {66002},
doi = {http://doi.org/10.1209/0295-5075/101/66002}
}
|
|||||
| Fuchs, Y., Soppera, O., Mayes, A.G. and Haupt, K. | Holographic Molecularly Imprinted Polymers for Label-Free Chemical Sensing | 2013 | Advanced Materials Vol. 25(4), pp. 566-570 |
article | DOI |
| Abstract: Holographic molecularly imprinted polymer films for the use in chemical sensors are obtained in one step through photopolymerization with interfering laser beams. This results in hierarchical structuring at four length scales: micrometer-scale patterning of millimeter- to centimeter- size polymer objects with holographic optical properties, exhibiting nanometer-scale porosity and specific molecular recognition properties at the molecular scale through self-assembly. Specific binding of the target analyte testosterone is measured by diffraction analysis. [GRAPHICS] . | |||||
BibTeX:
@article{Fuchs2013,
author = {Fuchs, Y. and Soppera, O. and Mayes, A. G. and Haupt, K.},
title = {Holographic Molecularly Imprinted Polymers for Label-Free Chemical Sensing},
journal = {Advanced Materials},
year = {2013},
volume = {25},
number = {4},
pages = {566--570},
doi = {http://doi.org/10.1002/adma.201203204}
}
|
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| Gasse, B., Karayigit, E., Mathieu, E., Jung, S., Garret, A., Huckert, M., Morkmued, S., Schneider, C., Vidal, L., Hemmerle, J., Sire, J.Y. and Bloch-Zupan, A. | Homozygous and Compound Heterozygous MMP20 Mutations in Amelogenesis Imperfecta | 2013 | Journal of Dental Research Vol. 92(7), pp. 598-603 |
article | DOI |
| Abstract: In this article, we focus on hypomaturation autosomal-recessive-type amelogenesis imperfecta (type IIA2) and describe 2 new causal Matrix metalloproteinase 20 (MMP20) mutations validated in two unrelated families: a missense mutation p.T130I at the expected homozygous state, and a compound heterozygous mutation having the same mutation combined with a nucleotide deletion, leading to a premature stop codon (p.N120fz*2). We characterized the enamel structure of the latter case using scanning electron microscopy analysis and microanalysis (Energy-dispersive X-ray Spectroscopy, EDX) and confirmed the hypomaturation-type amelogenesis imperfecta as identified in the clinical diagnosis. The mineralized content was slightly decreased, with magnesium substituting for calcium in the crystal structure. The anomalies affected enamel with minimal inter-rod enamel present and apatite crystals perpendicular to the enamel prisms, suggesting a possible new role for MMP20 in enamel formation. | |||||
BibTeX:
@article{Gasse2013,
author = {Gasse, B. and Karayigit, E. and Mathieu, E. and Jung, S. and Garret, A. and Huckert, M. and Morkmued, S. and Schneider, C. and Vidal, L. and Hemmerle, J. and Sire, J. Y. and Bloch-Zupan, A.},
title = {Homozygous and Compound Heterozygous MMP20 Mutations in Amelogenesis Imperfecta},
journal = {Journal of Dental Research},
year = {2013},
volume = {92},
number = {7},
pages = {598--603},
doi = {http://doi.org/10.1177/0022034513488393}
}
|
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| Gerardin, C., Reboul, J., Bonne, M. and Lebeau, B. | Ecodesign of ordered mesoporous silica materials | 2013 | Chem. Soc. Rev. Vol. 42, pp. 4217-4255 |
article | URL |
| Abstract: Characterized by a regular porosity in terms of pore size and pore network arrangement, ordered mesoporous solids have attracted increasing interest in the last two decades. These materials have been identified as potential candidates for several applications. However, more environmentally friendly and economical synthesis routes of mesoporous silica materials were found to be necessary in order to develop these applications on an industrial scale. Consequently, ecodesign of ordered mesoporous silica has been considerably developed with the objective of optimizing the chemistry and the processing aspects of the material synthesis. In this review, the main strategies developed with this aim are presented and discussed. | |||||
BibTeX:
@article{Gerardin2013,
author = {Gerardin, Corine and Reboul, Julien and Bonne, Magali and Lebeau, Benedicte},
title = {Ecodesign of ordered mesoporous silica materials},
journal = {Chem. Soc. Rev.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {42},
pages = {4217-4255},
url = {http://dx.doi.org/10.1039/C3CS35451B}
}
|
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| Gernigon, V., Leveque, P., Richard, F., Leclerc, N., Brochon, C., Braun, C.H., Ludwigs, S., Anokhin, D.V., Ivanov, D.A., Hadziioannou, G. and Heiser, T. | Microstructure and Optoelectronic Properties of P3HT-b-P4VP/PCBM Blends: Impact of PCBM on the Copolymer Self-Assembly | 2013 | Macromolecules Vol. 46(22), pp. 8824-8831 |
article | DOI |
| Abstract: Block copolymers have been widely investigated over the past decades for their ability to microphase separate into well-defined nanostructured thin films with tailored physical properties. The aim of the present study is to investigate the thin film properties of rod coil block copolymer/phenyl-C-61-butyric acid methyl ester (PCBM) blends as a function of the blend weight ratio, using a copolymer which is based on a poly(3-hexylthiophene) (P3HT) rod block and poly(4-vinylpyridine) (P4VP) coil block. Atomic force microscopy, transmission electron microscopy and grazing incidence X-ray diffraction analysis are used to study the influence of PCBM on the copolymer self-assembling. UV-visible absorption and photoluminescence spectroscopies as well as field-effect mobility measurements are performed in order to get further insight into the blend optoelectronic properties. It is found that the block copolymer phase-separated morphology and charge carrier mobilities strongly depend on the PCBM loading and thermal annealing. In particular, the results point out that PCBM enhances the block copolymer microphase separation within a narrow range of the polymer:PCBM weight ratio. In addition, clear evidence for PCBM accumulation within the P4VP domains is found by monitoring the P3HT fluorescence and charge carrier mobilities. | |||||
BibTeX:
@article{Gernigon2013,
author = {Gernigon, V. and Leveque, P. and Richard, F. and Leclerc, N. and Brochon, C. and Braun, C. H. and Ludwigs, S. and Anokhin, D. V. and Ivanov, D. A. and Hadziioannou, G. and Heiser, T.},
title = {Microstructure and Optoelectronic Properties of P3HT-b-P4VP/PCBM Blends: Impact of PCBM on the Copolymer Self-Assembly},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {22},
pages = {8824--8831},
doi = {http://doi.org/10.1021/ma4010692}
}
|
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| Geszke-Moritz, M., Piotrowska, H., Murias, M., Balan, L., Moritz, M., Lulek, J. and Schneider, R. | Thioglycerol-capped Mn-doped ZnS quantum dot bioconjugates as efficient two-photon fluorescent nano-probes for bioimaging | 2013 | Journal of Materials Chemistry B Vol. 1(5), pp. 698-706 |
article | DOI |
| Abstract: Water-dispersible 1-thioglycerol (TG)-capped Mn-doped ZnS quantum dots were prepared in aqueous solution using the nucleation-doping strategy. Using 4% Mn relative to Zn and a Zn(OAc)(2)/Na2S ratio of 0.9, Mn:ZnS nanocrystals with an average diameter of 3.9 +/- 0.5 nm, with pure Mn2+-related photoluminescence (PL) at 585 nm, and with a PL quantum yield of 13.2% were obtained. Transmission electron microscopy, X-ray powder diffraction, electron spin resonance, X-ray photoelectron spectroscopy, UV-visible spectroscopy and spectrofluorometry have been used to characterize the crystal structure, the doping status, and the optical properties of the doped-dots. Folic acid (FA) was linked to TG-capped Mn: ZnS nanocrystals to produce Mn:ZnS@TG-FA nanobioconjugates that were used for targeted in vitro delivery to a human cancer cell line. Folate receptor mediated cellular uptake of FA-functionalized dots is proven via confocal and two-photon imaging. | |||||
BibTeX:
@article{Geszke-Moritz2013,
author = {Geszke-Moritz, M. and Piotrowska, H. and Murias, M. and Balan, L. and Moritz, M. and Lulek, J. and Schneider, R.},
title = {Thioglycerol-capped Mn-doped ZnS quantum dot bioconjugates as efficient two-photon fluorescent nano-probes for bioimaging},
journal = {Journal of Materials Chemistry B},
year = {2013},
volume = {1},
number = {5},
pages = {698--706},
doi = {http://doi.org/10.1039/c2tb00247g}
}
|
|||||
| Ghimbeu Camelia Matei, C.M., Decaux, C., Brender, P., Dahbi, M., Lemordant, D., Raymundo-Piñero, E., Anouti, M., Béguin, F. and Vix-Guterl, C. | Influence of Graphite Characteristics on the Electrochemical Performance in Alkylcarbonate LiTFSI Electrolyte for Li-Ion Capacitors and Li-Ion Batteries | 2013 | Journal of The Electrochemical Society Vol. 160(10), pp. A1907-A1915 |
article | URL |
| Abstract: This work presents the influence of some graphite physico-chemical characteristics such as morphology, structure, textural properties, surface functionality and active surface area (ASA) on the electrochemical performance. The reversible and irreversible capacities, SEI formation at different charging rates, cycling ability have been determined using alkylcarbonate based electrolytes containing LiTFSI as main salt. Three families of graphites have been investigated by SEM, XRD, N2 adsorption, Temperature Programmed Desorption (TPD-MS), and their physico-chemical properties have been correlated to some extent to their electrochemical performances. The irreversible capacity at first cycle increases with the active surface area (ASA) and the specific surface area. The applied current density plays an important role in the SEI formation as shown by the reversible and irreversible capacities and the SEM observations. The passivation layer is mainly formed by polymeric species along with inorganic salts such as Li2CO3 or Li alkylcarbonates (ROLi) as revealed by XPS measurements. Nevertheless, very small quantities of LiTFSI degradation compounds have been detected (LiF, SOx) along with a reversible capacity fade. | |||||
BibTeX:
@article{Ghimbeu2013,
author = {Ghimbeu, Camelia Matei, Camelia Matei and Decaux, Céline and Brender, Patrice and Dahbi, Mouad and Lemordant, Daniel and Raymundo-Piñero, Encarnacion and Anouti, Mérièm and Béguin, François and Vix-Guterl, Cathie},
title = {Influence of Graphite Characteristics on the Electrochemical Performance in Alkylcarbonate LiTFSI Electrolyte for Li-Ion Capacitors and Li-Ion Batteries},
journal = {Journal of The Electrochemical Society},
year = {2013},
volume = {160},
number = {10},
pages = {A1907--A1915},
url = {http://jes.ecsdl.org/content/160/10/A1907.abstract}
}
|
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| Gokulakrishnan, N., Karbowiak, T., Bellat, J.P., Vonna, L., Saada, M.-A., Paillaud, J.L., Soulard, M., Patarin, J. and Parmentier, J. | Improved hydrophobicity of inorganic-organic hybrid mesoporous silica with cage-like pores | 2013 | Colloids and Surfaces A: Physicochemical and Engineering Aspects Vol. 421(0), pp. 34-43 |
article | URL |
| Abstract: Hydrophobic ordered mesoporous silica particles with cage-like pores (SBA-1 type) were prepared through co-condensation of phenyltriethoxysilane (PhTES) and tetraethylorthosilicate (TEOS) at different TEOS/PhTES molar ratios. It is shown that the hydrophobic character of the particles is enhanced by increasing the phenyl loading (decreasing the TEOS/PhTES molar ratio) and that it could be further enhanced by subsequent trimethylsilyl (TMS) grafting on remaining silanol groups (TMS-PhSBA-1 sample). This increase of hydrophobicity has been evidenced on the internal surface (mesoporosity) of the particles using water adsorption and, on the external surface of the particles (in the form of a pellet) using contact angle measurements. Interestingly, a high hysteresis was measured on the most hydrophobic sample (TMS-PhSBA-1), both on its internal surface during high pressure intrusion/extrusion of liquid water and on its external surface using advancing/receding contact angle measurements. This hydrophobic/hydrophilic behavior is explained by surface silanol sites, first shielded by hydrophobic organic moieties and, which subsequently trap water molecules within the porosity or on the external surface after a forced contact with liquid water. The absence of water extrusion (bumper behavior) of this material is then related both to the presence of silanol sites and to the restricted aperture of the cage-like pore morphology. | |||||
BibTeX:
@article{Gokulakrishnan,
author = {Gokulakrishnan, Narasimhan and Karbowiak, Thomas and Bellat, Jean Pierre and Vonna, Laurent and Saada, Mohamed-Ali and Paillaud, Jean Louis and Soulard, Michel and Patarin, Joël and Parmentier, Julien},
title = {Improved hydrophobicity of inorganic-organic hybrid mesoporous silica with cage-like pores},
journal = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
year = {2013},
volume = {421},
number = {0},
pages = {34-43},
url = {http://www.sciencedirect.com/science/article/pii/S0927775712008382}
}
|
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| Gokulakrishnan, N., Parmentier, J., Trzpit, M., Vonna, L., Paillaud, J.L. and Soulard, M. | Intrusion/Extrusion of Water Into Organic Grafted SBA-15 Silica Materials for Energy Storage | 2013 | Journal of Nanoscience and Nanotechnology Vol. 13(4), pp. 2847-2852 |
article | DOI |
| Abstract: Mesoporous SBA-15 silica materials were grafted with trialkylsilyl compounds having short (C-1) and long (C-8) carbon chain and characterized by XRD, N-2 physisorption analysis, Si-29 MAS-NMR and contact angle (CA) measurements. A drastic enhancement of the hydrophobic property after grafting was observed by forced intrusion water; it occurred in two steps and with quite high intrusion pressures (mean values similar to 10 and similar to 15 MPa). The hydrophobic nature of both internal and external surface area was confirmed by Si-29 MAS-NMR and CA measurements, respectively. After contact with water, materials displayed a partial hydrophobic behaviour with uncompleted spontaneous extrusion. The energies absorbed during water intrusion correspond to 4.3 and 6.1 J . g(-1) for C-1 and C-8 grafted species, respectively. | |||||
BibTeX:
@article{Gokulakrishnan2013,
author = {Gokulakrishnan, N. and Parmentier, J. and Trzpit, M. and Vonna, L. and Paillaud, J. L. and Soulard, M.},
title = {Intrusion/Extrusion of Water Into Organic Grafted SBA-15 Silica Materials for Energy Storage},
journal = {Journal of Nanoscience and Nanotechnology},
year = {2013},
volume = {13},
number = {4},
pages = {2847--2852},
doi = {http://doi.org/10.1166/jnn.2013.7405}
}
|
|||||
| Gomez, L.P.C., Bollgruen, P., Egunov, A.I., Mager, D., Malloggi, F., Korvink, J.G. and Luchnikov, V.A. | Vapour processed self-rolled poly(dimethylsiloxane) microcapillaries form microfluidic devices with engineered inner surface | 2013 | Lab On A Chip Vol. 13(19), pp. 3827-3831 |
article | DOI |
| Abstract: We propose a microfluidics device whose main functional part consists of a microcapillary produced by the self-rolling of a thin poly(dimethylsiloxane) film. Rolling is caused by inhomogeneous swelling of the film, pre-treated by oxygen plasma, in the vapour of chloroform. The capillaries are integrated with external electrical circuits by co-rolling electrodes and micro-resistors. The local control of temperature in the tubes by Joule heating is illustrated via the rate of an intra-tubular chemiluminescent reaction. The novel tubes with engineered inner structure can find numerous advanced applications such as functional elements of integrated microfluidics circuits. | |||||
BibTeX:
@article{Gomez2013,
author = {Gomez, L. P. C. and Bollgruen, P. and Egunov, A. I. and Mager, D. and Malloggi, F. and Korvink, J. G. and Luchnikov, V. A.},
title = {Vapour processed self-rolled poly(dimethylsiloxane) microcapillaries form microfluidic devices with engineered inner surface},
journal = {Lab On A Chip},
year = {2013},
volume = {13},
number = {19},
pages = {3827--3831},
doi = {http://doi.org/10.1039/c3lc50542a}
}
|
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| Goourey, G.G., de Sainte Claire, P., Balan, L. and Israeli, Y. | Acrylate photopolymer doped with ZnO nanoparticles: an interesting candidate for photo-patterning applications | 2013 | J. Mater. Chem. C Vol. 1(21), pp. 3430-3438 |
article | URL |
| Abstract: The study is devoted to the photo-patterning of photopolymers doped with dispersed ZnO quantum dots (QDs). It is checked first that ZnO QDs retain their fluorescence properties upon polymerization of the acrylate monomer mixtures. The photosensitizer (camphorquinone in our work, CQ) plays an important role in the polymerization process. Experimental and theoretical investigations are undertaken to understand the observed differences induced by the addition of a tertiary amine co-initiator species. Indeed, it is shown experimentally that in the presence of a co-initiator, when the maximum of monomer conversion is reached, the concentration of camphorquinone starts to decrease, whereas a new compound that absorbs at 390 nm is produced. It is proposed here on the basis of theoretical calculations that this species is the charge transfer complex [CQ[radical dot]-amine[radical dot]+], which is stabilized in high viscous media. Then, it was shown that the addition of ZnO QDs does not modify the kinetics of polymerization but rather contributes to the enhancement of the refractive index modulation (an increase of 33% is observed) because of their spatial distribution. | |||||
BibTeX:
@article{Goourey2013a,
author = {Goourey, Georgia G. and de Sainte Claire, Pascal and Balan, Lavinia and Israeli, Yael},
title = {Acrylate photopolymer doped with ZnO nanoparticles: an interesting candidate for photo-patterning applications},
journal = {J. Mater. Chem. C},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {1},
number = {21},
pages = {3430--3438},
url = {http://dx.doi.org/10.1039/C3TC30263F}
}
|
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| Grigorescu, S., Hindié, M., Axente, E., Carreiras, F., Anselme, K., Werckmann, J., Mihailescu, I. and Gallet, O. | Fabrication of functional fibronectin patterns by nanosecond excimer laser direct write for tissue engineering applications | 2013 | J. Mater Sci : Mater Med Vol. 24(7)Journal of Materials Science: Materials in Medicine, pp. 1809-1821- |
article | URL |
| Abstract: Laser direct write techniques represent a prospective alternative for engineering a new generation of hybrid biomaterials via the creation of patterns consisting of biological proteins onto practically any type of substrate. In this paper we report on the characterization of fibronectin features obtained onto titanium substrates by UV nanosecond laser transfer. Fourier-transform infrared spectroscopy measurements evidenced no modification in the secondary structure of the post-transferred protein. The molecular weight of the transferred protein was identical to the initial fibronectin, no fragment bands being found in the transferred protein's Western blot migration profile. The presence of the cell-binding domain sequence and the mannose groups within the transferred molecules was revealed by anti-fibronectin monoclonal antibody immunolabelling and FITC-Concanavalin-A staining, respectively. The in vitro tests performed with MC3T3-E1 osteoblast-like cells and Swiss-3T3 fibroblasts showed that the cells' morphology and spreading were strongly influenced by the presence of the fibronectin spots. | |||||
BibTeX:
@article{Grigorescu2013,
author = {Grigorescu, S. and Hindié, M. and Axente, E. and Carreiras, F. and Anselme, K. and Werckmann, J. and Mihailescu, I.N. and Gallet, O.},
title = {Fabrication of functional fibronectin patterns by nanosecond excimer laser direct write for tissue engineering applications},
booktitle = {Journal of Materials Science: Materials in Medicine},
journal = {J. Mater Sci : Mater Med},
publisher = {Springer US},
year = {2013},
volume = {24},
number = {7},
pages = {1809-1821--},
url = {http://dx.doi.org/10.1007/s10856-013-4927-0}
}
|
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| Haneda, M., Bonne, M., Duprez, D. and Ozawa, M. | Effect of Y-stabilized ZrO2 as support on catalytic performance of Pt for n-butane oxidation | 2013 | Catalysis Today Vol. 201, pp. 25-31 |
article | DOI |
| Abstract: The effect of Y-stabilized ZrO2 as support on the Pt dispersion and catalytic activity for the total oxidation of n-butane was investigated. From XRD, TEM and CO chemisorption measurements, Pt particles were found to be well dispersed with a size of ca. 10 nm over the surface of ZrO2 and Y-stabilized ZrO2, when Pt supported catalysts were calcined at 600 degrees C. Although Pt particles supported on ZrO2 were significantly sintered by high temperature calcination above 800 degrees C, no aggregation of Pt particles was observed for Pt/Y-ZrO2. When the catalyst was calcined at higher temperatures, Pt catalysts supported on Y-stabilized ZrO2 showed higher activity than Pt/ZrO2 for the total oxidation of n-butane. The intrinsic activity, expressed in terms of turnover frequency (TOF), increased with the decrease in Pt dispersion, indicating that n-butane oxidation over Pt catalysts supported on Y-stabilized ZrO2 is a structure sensitive reaction. Y2O3 additive plays a role in improving the thermal stability of Pt particles through the metal-support interaction, while it does not alter the catalytic performance of Pt as catalytic active sites. (C) 2012 Elsevier B. V. All rights reserved. | |||||
BibTeX:
@article{Haneda2013,
author = {Haneda, M. and Bonne, M. and Duprez, D. and Ozawa, M.},
title = {Effect of Y-stabilized ZrO2 as support on catalytic performance of Pt for n-butane oxidation},
journal = {Catalysis Today},
year = {2013},
volume = {201},
pages = {25--31},
doi = {http://doi.org/10.1016/j.cattod.2012.03.025}
}
|
|||||
| Hisler, V., Palmieri, M., Le Houerou, V., Gauthier, C., Nardin, M., Vallat, M.F. and Vonna, L. | Scale invariance of the contact mechanics of micropatterned elastic substrates | 2013 | International Journal of Adhesion and Adhesives Vol. 45, pp. 144-149 |
article | DOI |
| Abstract: This paper describes the conditions for contact formation between soft elastic hemispheres and soft elastic substrates micropatterned with pillars. These microstructured substrates were often proposed in the two past decades for the control of adhesion. In this study the hexagonal micropillars are arranged in hexagonal arrays and the width L of the pillars as well as the distance D between the pillars (with L=D for a sample) are both varied from one sample to another in order to keep the overall planar surface fraction of the pillars constant. Additionally, two pillars of heights h=4 mu m and h=16 mu m are considered here. As expected from previous studies different contact morphologies are found as a function of the aspect ratio and the contact pressure. The contact may be formed (i) only at the top of the pillar, (ii) both at the top and between the pillars, or (iii) simultaneously at the top of the pillars and in between the pillars at the centre of the contact for which the pressure is the highest. Unexpectedly it is shown in this last case that the same contact morphology is obtained with the same pressure if the surface pattern aspect ratio L/h is varied homothetically, suggesting a scale invariant behaviour of the contact formation between the hemisphere and the soft elastic micropatterned substrate. (C) 2013 Elsevier Ltd. All rights reserved. | |||||
BibTeX:
@article{Hisler2013,
author = {Hisler, V. and Palmieri, M. and Le Houerou, V. and Gauthier, C. and Nardin, M. and Vallat, M. F. and Vonna, L.},
title = {Scale invariance of the contact mechanics of micropatterned elastic substrates},
journal = {International Journal of Adhesion and Adhesives},
year = {2013},
volume = {45},
pages = {144--149},
doi = {http://doi.org/10.1016/j.ijadhadh.2013.04.006}
}
|
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| Jin, M., Xu, H.R., Hong, H., Malval, J.P., Zhang, Y., Ren, A.M., Wan, D.C. and Pu, H.T. | Design of D-pi-A type photoacid generators for high efficiency excitation at 405 nm and 800 nm | 2013 | Chemical Communications Vol. 49(76), pp. 8480-8482 |
article | DOI |
| Abstract: New sulfonium salts with diphenylamino asymmetrically substituted stilbene as a D-pi-A conjugated system have been synthesized. The resulting photoacid generators exhibit a highly efficient acid photogeneration process by either one-photon 405 nm or two- photon 800 nm excitation. | |||||
BibTeX:
@article{Jin2013,
author = {Jin, M. and Xu, H. R. and Hong, H. and Malval, J. P. and Zhang, Y. and Ren, A. M. and Wan, D. C. and Pu, H. T.},
title = {Design of D-pi-A type photoacid generators for high efficiency excitation at 405 nm and 800 nm},
journal = {Chemical Communications},
year = {2013},
volume = {49},
number = {76},
pages = {8480--8482},
doi = {http://doi.org/10.1039/c3cc43018a}
}
|
|||||
| Karaki, M., Karout, A., Toufaily, J., Rataboul, F., Essayem, N. and Lebe | Synthesis and characterization of acidic ordered mesoporous organosilica SBA-15: Application to the hydrolysis of cellobiose and insight into the stability of the acidic functions | 2013 | journal of catalysis Vol. 305, pp. 204-216 |
article | DOI |
| Abstract: The present work aimed to investigate the potential of acidic ordered mesoporous organosilica SBA-15 with a controlled local environment of the acid sites for applications in acid-catalyzed reactions in hot water, such as cellobiose hydrolysis. The hybrid silica was prepared by condensation of 1,4-bis(triethoxysilyl) benzene. The material was sulfonated using chlorosulfonic acid or 3-mercaptopropyltrimethoxysilane and further oxidized with H2O2 to give Brønsted solid acids, which were fully characterized. Their acidic properties were studied by calorimetry of NH3 adsorption and in the model reaction of gas-phase isopropanol dehydration and compared with the reference acidic sulfonated resin, Amberlyst 15. The introduction of mercaptopropyl organic arms, oxidized by H2O2, did not change the structure of the material, while sulfonation with chlorosulfonic acid led to a less organized solid. In both cases, calorimetry of NH3 adsorption has evidenced the heterogeneity of the acid strength distribution, suggesting the presence of distinct sites of sulfonation, contrary to our expectation. This was supported by XPS analysis. For gas-phase isopropanol dehydration, the solids sulfonated with chlorosulfonic acid exhibited activity equivalent to that of the sulfonated resin, Amberlyst 15, but were less stable due to sulfur species release, assumed to be sulfonated silanols. The acidic organosilicas SBA-15 obtained via H2O2 oxidation of the mercaptopropyl group are less acidic catalysts, showing low activity for gas-phase isopropanol dehydration. However, no sulfur release was observed. The hybrid solid acids were evaluated in a reaction of great interest in the context of the biomass valorization: cellobiose hydrolysis in hot water. The solids were active at 150 C; however, sulfur leaching analysis showed that the reaction proceeds mainly homogeneously, especially for the material acidified with chlorosulfonic acid. A hot washing pretreatment applied to the catalysts containing the sulfonated propyl groups led to a decrease in their hydrolysis activity, but along with an increase in stability, allowing recycling. | |||||
BibTeX:
@article{Karaki2013,
author = {Karaki, M. and Karout, A. and Toufaily, J. and Rataboul, F. and Essayem, N. and Lebe},
title = {Synthesis and characterization of acidic ordered mesoporous organosilica SBA-15: Application to the hydrolysis of cellobiose and insight into the stability of the acidic functions},
journal = {journal of catalysis},
year = {2013},
volume = {305},
pages = {204-216},
doi = {http://doi.org/10.1016/j.jcat.2013.04.024}
}
|
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| Khay, I., Tzanis, L., Daou, J., Nouali, H., Ryzhikov, A. and Patarin, J. | Energetic behavior of the pure silica ITQ-12 (ITW) zeolite under high pressure water intrusion | 2013 | Phys. Chem. Chem. Phys. Vol. 15(46), pp. 20320-20325 |
article | URL |
| Abstract: Experimental water intrusion-extrusion isotherms were obtained at room temperature on pure silica ITW-type zeolites (ITQ-12 zeosil). The water intrusion is obtained by applying a high hydraulic pressure corresponding to the intrusion step. When the pressure is released, the water extrusion occurs at a similar pressure to that of the intrusion one. Therefore, the "ITW zeosil-water" system behaves like a spring and the phenomenon is reproducible over several cycles. Several characterization techniques have been performed before and after water intrusion-extrusion experiments in order to reveal the presence or the lack of defects after such experiments. Structural modifications at the long range order cannot be observed by XRD analysis after three water intrusion-extrusion cycles. However, solid state NMR spectroscopy provides evidence of the presence of Q3 groups revealing the breaking of some siloxane bridges after the intrusion step. The "ITW zeosil-water" system can restore 100% of the stored energy corresponding to about 8 J g-1. | |||||
BibTeX:
@article{Khay2013,
author = {Khay, Ismail and Tzanis, Lydie and Daou, Jean and Nouali, Habiba and Ryzhikov, Andrey and Patarin, Joel},
title = {Energetic behavior of the pure silica ITQ-12 (ITW) zeolite under high pressure water intrusion},
journal = {Phys. Chem. Chem. Phys.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {15},
number = {46},
pages = {20320--20325},
url = {http://dx.doi.org/10.1039/C3CP53570C}
}
|
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| Kiehl, J., Ben-Azzouz, C., Dentel, D., Derivaz, M., Bischoff, J.L., Delaite, C. and Bistac, S. | Grafting process of ethyltrimethoxysilane and polyphosphoric acid on calcium carbonate surface | 2013 | Applied Surface Science Vol. 264, pp. 864-871 |
article | DOI |
| Abstract: In order to facilitate its incorporation into a polymer matrix (mostly hydrophobic), calcium carbonate (CaCO3), which is strongly hydrophilic, has to be chemically treated to avoid the formation of aggregates and to improve the compatibility with the polymer. The objective of this study is to analyze, by using contact angle measurements and X-ray photoelectron spectroscopy (XPS), the CaCO3 surface after a chemical surface treatment with ethyltrimethoxysilane (ETMO) and polyphosphoric acid (PPA) in an organic solvent, in order to verify if these molecules are able to interact with the CaCO3 surface, and to propose some hypothesis about the surface grafting mechanism. After several solvent washings were performed to remove all species in excess, contact angle results have pointed out the presence of an organic layer after the chemical treatment of CaCO3 with ETMO and PPA. Based on XPS results, we propose a grafting mechanism of silane and phosphoric acid molecules. Ethyltrimethoxysilane induce an hydrolysis process of the CaCO3 surface which leads to a condensation phenomenon. This Si OH network is adsorbed through hydrogen interactions with some hydroxyl groups. In the case of phosphoric acid, the molecules are adsorbed on carbon atoms through P-O-C bonds formation. This original grafting points out the major role of the solvent nature with CaCO3 surface reactivity. (C) 2012 Elsevier B. V. All rights reserved. | |||||
BibTeX:
@article{Kiehl2013,
author = {Kiehl, J. and Ben-Azzouz, C. and Dentel, D. and Derivaz, M. and Bischoff, J. L. and Delaite, C. and Bistac, S.},
title = {Grafting process of ethyltrimethoxysilane and polyphosphoric acid on calcium carbonate surface},
journal = {Applied Surface Science},
year = {2013},
volume = {264},
pages = {864--871},
doi = {http://doi.org/10.1016/j.apsusc.2012.10.166}
}
|
|||||
| Knoerr, R., Brendlé, J., Lebeau, B. and Demais, H. | Preparation of ferric oxide modified diatomite and its application in the remediation of As(III) species from solution | 2013 | Microporous and Mesoporous Materials Vol. 169(0), pp. 185-191 |
article | URL |
| Abstract: A new iron oxide-diatomite system was synthesized in one pot by mixing natural diatomite with a ferrous sulfate solution at room temperature. The characterization of the materials (Diatom-Fe) by XRD and chemical analysis revealed that iron (29% w/w) was crystallized under goethite phase (α-FeOOH). Analysis conducted by SEM further highlighted the preferential presence of goethite on the surface of diatomite, which involves hydrogen bonding between diatomite surface silanol groups and ion species. The mechanism of formation of goethite is suggested to occur through the precipitation of ferrous ions by hydroxyls ions followed by the oxidation of the iron species to yield first to lepidocrocite (γ-FeOOH) then goethite that is thermodynamically more stable. Within this mechanism, the contribution of calcium carbonate through its dissolution into hydroxyls species is evidenced by XRD and FTIR analyses. The remediation properties of Diatom-Fe towards arsenite species cations were investigated in batch jar tests for 24 h at auto-equilibrium pH. The materials showed a noticeable higher As (III) sorption capacity (16 mg/g) than the native diatomite (0.5 mg/g). These results can be explained by the strong affinity of arsenites to goethite which is further emphasized by the dispersion of the iron oxide crystals on diatomite surface. | |||||
BibTeX:
@article{Knoerr2013,
author = {Knoerr, R. and Brendlé, J. and Lebeau, B. and Demais, H.},
title = {Preparation of ferric oxide modified diatomite and its application in the remediation of As(III) species from solution},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {169},
number = {0},
pages = {185--191},
url = {http://www.sciencedirect.com/science/article/pii/S1387181112005963}
}
|
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| Labiadh, H., Chaabane, T.B., Piatkowski, D., Mackowski, S., Lalevee, J., Ghanbaja, J., Aldeek, F. and Schneider, R. | Aqueous route to color-tunable Mn-doped ZnS quantum dots | 2013 | Materials Chemistry and Physics Vol. 140(2-3), pp. 674-682 |
article | URL |
| Abstract: Abstract Mn-doped zinc sulfide (Mn:ZnS) quantum dots stabilized by 3-mercaptopropionic acid (MPA) were synthesized at 100 °C in basic aqueous solution using the nucleation-doping strategy. The optical properties and structure of the obtained Mn:ZnS QDs have been characterized by UV-vis, photoluminescence (PL) and time-resolved PL spectroscopies, transmission electron microscopy (TEM), X-ray diffraction (XRD), and electron spin resonance (ESR). The obtained nearly monodisperse Mn:ZnS@MPA QDs have an average diameter of ca. 2.5 nm and a zinc-blende crystal structure. By varying the base (LiOH, NaOH, KOH, CsOH) used to deprotonate the MPA ligand and adjust the pH of the aqueous solution to 11, the PL emission wavelengths can be tuned within a relatively large optical window, from 567 to 594 nm. The variations of charge density near the surface of the QDs obtained by changing the cation associated to the MPA ligand and of the dopant location in the ZnS host are at the origin of the PL shifts observed. In order to improve the PL emission efficiency, a ZnS shell was subsequently overcoated around the Mn:ZnS core nanocrystals. With ZnS shell growth, the PL emission wavelength was restricted between 570 and 583 nm but PL quantum efficiency of Mn:ZnS/ZnS core/shell QDs increased up to 18.4%. | |||||
BibTeX:
@article{Labiadh2013,
author = {Labiadh, Houcine and Chaabane, Tahar Ben and Piatkowski, David and Mackowski, Sebastian and Lalevee, Jacques and Ghanbaja, Jaafar and Aldeek, Fadi and Schneider, Raphaël},
title = {Aqueous route to color-tunable Mn-doped ZnS quantum dots},
journal = {Materials Chemistry and Physics},
year = {2013},
volume = {140},
number = {2-3},
pages = {674--682},
url = {http://www.sciencedirect.com/science/article/pii/S0254058413003325}
}
|
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| Labidi, H., Sonnet, P. and Riedel, D. | Electronic Control of the Tip-Induced Hopping of an Hexaphenyl-Benzene Molecule Physisorbed on a Bare Si(100) Surface at 9 K | 2013 | Journal of Physical Chemistry C Vol. 117(26), pp. 13663-13675 |
article | DOI |
| Abstract: In this work, we show that the hopping directivity of individual hexaphenyl-benzene (HPB) molecules physisorbed along the S-A step edge of a bare Si(100)-2x1 surface can be reversibly controlled with a periodic hopping length. This is achieved by using the tunnel electrons of a low temperature (9 K) scanning tunneling microscope (STM). A statistical analysis of the electronic excitations applied at various positions on the HPB molecule reveals that the hopping process is related to a strong decrease of the tunnel junction conductance. This process is associated with a charge transfer from the silicon surface to the HPB molecule leading to a hopping mechanism that occurs in two sequential steps. The first step of the hopping process involves the formation of an HPB- anion that triggers the molecular motion into a metastable state. The second step is related to the neutralization of the HPB- anion which provokes the manipulation of the molecule to its final steady position. Our experimental data are supported by the calculations of the relaxed molecule using the density functional theory on the Si(100) surface that takes the van der Waals forces interactions into account Additional calculations of the HPB anion orbitals depict the spatial localization of the extra charge inside the HPB molecule and the relative energies of the HPB molecular orbitals. Finally, our study shows that the hopping direction can be optimized by positioning the STM tip at specific locations along the hopping pathway. | |||||
BibTeX:
@article{Labidi2013,
author = {Labidi, H. and Sonnet, P. and Riedel, D.},
title = {Electronic Control of the Tip-Induced Hopping of an Hexaphenyl-Benzene Molecule Physisorbed on a Bare Si(100) Surface at 9 K},
journal = {Journal of Physical Chemistry C},
year = {2013},
volume = {117},
number = {26},
pages = {13663--13675},
doi = {http://doi.org/10.1021/jp4025014}
}
|
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| Lauridant, N., Daou, J., Arnold, G., Nouali, H., Patarin, J. and Faye, D. | Zeolite hybrid films for space decontamination | 2013 | Microporous and Mesoporous Materials Vol. 172(0), pp. 36-43 |
article | URL |
| Abstract: A bi-layer film composed of a thick layer of ZSM-5 zeolite (MFI-structure type) and a thin layer of EMC-1 zeolite (FAU-structure type) was synthesized on aluminum alloys widely used in aerospace industry. The bottom MFI layer was obtained by direct hydrothermal synthesis while secondary growth method was used for the top FAU layer. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results revealed that both layers are highly crystallized, uniform and well-intergrown with a total film thickness around 10 μm. Nitrogen sorption measurements indicated that ZSM-5 and EMC-1 layers present an accessible porosity. The high micropore volumes lead to considerably good adsorption properties towards pollutants. Such a result was confirmed by the n-hexane sorption capacity of the hybrid film which is identical to what is expected for a corresponding powder mixture. Adhesion of zeolite films on aluminum substrate was investigated by scratch tests which highlighted a good adhesion between the bottom layer and the support as well as between the two zeolite layers. The process described in this paper for the formation of a MFI/FAU bi-layer film can be easily extended to other hybrid coating film. | |||||
BibTeX:
@article{Lauridant2013a,
author = {Lauridant, N. and Daou, J. and Arnold, G. and Nouali, H. and Patarin, J. and Faye, D.},
title = {Zeolite hybrid films for space decontamination},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {172},
number = {0},
pages = {36--43},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113000371}
}
|
|||||
| Lauridant, N., Daou, J., Arnold, G., Patarin, J. and Faye, D. | MFI/*BEA hybrid coating on aluminum alloys | 2013 | Microporous and Mesoporous Materials Vol. 166(0)'Innovations in Zeolites and ordered Porous Solids' Selected Papers and Invited Lectures from the 5th International FEZA Conference (FEZA-2011) July 3-7, 2011, pp. 79-85 |
article | URL |
| Abstract: Hybrid bi-layered film composed of a thick layer of ZSM-5 zeolite (MFI structure-type) and a thin layer of Beta zeolite (∗BEA structure-type) is synthesized on aluminum alloys widely used in aerospace industry. In the first step, the bottom MFI layer is formed by direct hydrothermal synthesis on aluminum substrates. In the second step, the ZSM-5 film is seeded with zeolite Beta nanocrystals followed by a secondary growth of the ∗BEA layer using two starting gel compositions. Depending on the Si/Al molar ratio of the starting solution, ZSM-12 zeolite can also crystallise as an impurity phase. It is shown that the crystallisation step of the top layer is faster using zeolite Beta seeds. The sorption capacity of the hybrid film determined by nitrogen adsorption-desorption measurements is promising for technological uses in space decontamination. | |||||
BibTeX:
@article{Lauridant2013b,
author = {Lauridant, Natacha and Daou, Jean and Arnold, Gilles and Patarin, Joël and Faye, Delphine},
title = {MFI/*BEA hybrid coating on aluminum alloys},
booktitle = {'Innovations in Zeolites and ordered Porous Solids' Selected Papers and Invited Lectures from the 5th International FEZA Conference (FEZA-2011) July 3-7, 2011},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {166},
number = {0},
pages = {79--85},
url = {http://www.sciencedirect.com/science/article/pii/S1387181112002843}
}
|
|||||
| Lebeau, B., Galarneau, A. and Linden, M. | Introduction for 20 years of reserach on ordered mesoporous materials [BibTeX] |
2013 | Chem. Soc Rev Vol. 42, pp. 3661-3662 |
article | DOI |
BibTeX:
@article{Lebeau2013,
author = {Lebeau, B. and Galarneau, A. and Linden, M.},
title = {Introduction for 20 years of reserach on ordered mesoporous materials},
journal = {Chem. Soc Rev},
year = {2013},
volume = {42},
pages = {3661-3662},
doi = {http://doi.org/10.1039/c3cs90005c}
}
|
|||||
| Lefort, M., Jierry, L., Boulmedais, F., Benmlih, K., Lavalle, P., Senger, B., Voegel, J.C., Hemmerle, J., Ponche, A. and Schaaf, P. | Nanosized Films Based on Multicharged Small Molecules and Oppositely Charged Polyelectrolytes Obtained by Simultaneous Spray Coating of Interacting Species | 2013 | Langmuir Vol. 29(47), pp. 14536-14544 |
article | DOI |
| Abstract: Simultaneous spraying of polyelectrolytes and small multicharged molecules of opposite charges onto a vertical substrate leads to continuous buildups of organic films. Here, we investigate the rules governing the buildup of two such systems: poly(allylamine hydrochloride)/sodium citrate (PAH/citrate) and PAH/sulfated alpha-cyclodextrin (PAH/CD-S). Special attention is paid to the film growth rate as a function of the spraying rate ratio of the two constituents. This parameter was varied by increasing the spraying rate of one of the constituents while maintaining constant that of the other. For PAH/CD-S systems, whatever the constituent (PAH or CD-S) whose spraying rate was kept fixed, the film growth rate first increases and passes through a maximum before decreasing when the spraying rate of the other constituent is increased. For PAH/citrate, the film growth rate reaches a plateau value when the spraying rate of citrate is increased while that of PAH is maintained constant, whereas when the spraying rate of citrate is maintained constant and that of PAH is increased, a behavior similar to that of PAH/CD-S is observed. The composition of PAH/CD-S sprayed films determined by X-ray photoelectron spectroscopy is independent of the spraying rate ratio of the two constituents and corresponds to one allylamine for one sulfate group. For PAR/citrate, by increasing the PAR/citrate spraying rate ratio, the carboxylic/nitrogen ratio in the film increases and tends to 1. There is thus always a deficit of carboxylic groups (COO- + COOH) with respect to amines (NH2 + NH3+). Yet, the ratio (COO-/NH3+) is always close to 1, ensuring exact charge compensation. The film morphology determined by atomic force microscopy is granular for PAH/CD-S and is smooth and liquid-like for PAR/citrate. A model based on strong (respectively weak) interactions between PAR and CD-S (respectively citrate) is proposed to explain these features. | |||||
BibTeX:
@article{Lefort2013,
author = {Lefort, M. and Jierry, L. and Boulmedais, F. and Benmlih, K. and Lavalle, P. and Senger, B. and Voegel, J. C. and Hemmerle, J. and Ponche, A. and Schaaf, P.},
title = {Nanosized Films Based on Multicharged Small Molecules and Oppositely Charged Polyelectrolytes Obtained by Simultaneous Spray Coating of Interacting Species},
journal = {Langmuir},
year = {2013},
volume = {29},
number = {47},
pages = {14536--14544},
doi = {http://doi.org/10.1021/la403580d}
}
|
|||||
| Li, C.H., Stehlin, F., Wang, K.R., Lin, Y.H., Wieder, F., Soppera, O., Zan, H.W. and Meng, H.F. | Achieving saturation in vertical organic transistors for organic light-emitting diode driving by nanorod channel geometric control | 2013 | Applied Physics Letters Vol. 102(16), pp. 163305 |
article | DOI |
| Abstract: When conventional field-effect transistors with short channel length suffer from non-saturated output characteristics, this work proposed a vertical channel transistor to operate like a solid-state vacuum tube and exhibit good saturated curves. We utilized deep ultra-violet interference lithography to produce ordered grid-like metal to control the potential profile in vertical channel. We compared experimental and simulated characteristics to investigate the keys to achieve saturation. Finally, with an optimized design, a vertical organic transistor is used to drive a solution-processed white-light organic light-emitting diode to perform a luminescence control (0-260 cd/m(2)) with a 3.3-V base potential swing. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4802999] | |||||
BibTeX:
@article{Li2013,
author = {Li, C. H. and Stehlin, F. and Wang, K. R. and Lin, Y. H. and Wieder, F. and Soppera, O. and Zan, H. W. and Meng, H. F.},
title = {Achieving saturation in vertical organic transistors for organic light-emitting diode driving by nanorod channel geometric control},
journal = {Applied Physics Letters},
year = {2013},
volume = {102},
number = {16},
pages = {163305},
doi = {http://doi.org/10.1063/1.4802999}
}
|
|||||
| Li, X.J., Nicollin, A., Pizzi, A., Zhou, X., Sauget, A. and Delmotte, L. | Natural tannin-furanic thermosetting moulding plastics | 2013 | Rsc Advances Vol. 3(39), pp. 17732-17740 |
article | DOI |
| Abstract: A new 100% biosourced thermosetting plastic material, named condensed tannin-furanic thermoset is prepared and characterized in this paper. This new material is synthesized from tannin and furfuryl alcohol, both of which are inexpensive plant-derived chemicals. The co-polymerization process of these two chemicals was studied by C-13 nuclear magnetic resonance (NMR) and matrix-assisted laser desorption-ionization time-of-flight (MALDI-ToF) mass spectroscopy. The 100% renewable bioresourced tannin-furanic thermosetting resin was found to have a glass transition temperature as high as 211 degrees C, and a 95% weight loss temperature of 244 degrees C and 240 degrees C in a nitrogen and in an air atmosphere, respectively. The char yield is as high as 52%. Moreover, this new thermoset material shows excellent mechanical properties: a Brinell hardness of 23 HBS, which is higher than commercial acrylic, polyvinyl chloride, and a little lower than that of solid polystyrene. The compressive break strength was found to be as high as 194.4 MPa, thus higher than that of filled phenolic resins, and much higher than that of solid polystyrene and of acetal resins. | |||||
BibTeX:
@article{Li2013a,
author = {Li, X. J. and Nicollin, A. and Pizzi, A. and Zhou, X. and Sauget, A. and Delmotte, L.},
title = {Natural tannin-furanic thermosetting moulding plastics},
journal = {Rsc Advances},
year = {2013},
volume = {3},
number = {39},
pages = {17732--17740},
doi = {http://doi.org/10.1039/c3ra43095b}
}
|
|||||
| Lima, P.A.L., Resende, C.X., Soares, G.D.D., Anselme, K. and Almeida, L.E. | Preparation, characterization and biological test of 3D-scaffolds based on chitosan, fibroin and hydroxyapatite for bone tissue engineering | 2013 | Materials Science & Engineering C-materials For Biological Applications Vol. 33(6), pp. 3389-3395 |
article | DOI |
| Abstract: This work describes the preparation and characterization of porous 3D-scaffolds based on chitosan (CHI), chitosan/silk fibroin (CHI/SF) and chitosan/silk fibroin/hydroxyapatite (CHI/SF/HA) by freeze drying. The biomaterials were characterized by X-ray diffraction, attenuated total reflection Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy and energy dispersive spectroscopy. In addition, studies of porosity, pore size, contact angle and biological response of SaOs-2osteoblastic cells were performed. The CHI scaffolds have a porosity of 94.2 +/- 0.9%, which is statistically higher than the one presented by CHI/SF/HA scaffolds, 89.7 +/- 2.6%. Although all scaffolds were able to promote adhesion, growth and maintenance of osteogenic differentiation of SaOs-2 cells, the new 3D-scaffold based on CHI/SF/HA showed a significantly higher cell growth at 7 days and 21 days and the level of alkaline phosphatase at 14 and 21 days was statistically superior compared to other tested materials. (c) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Lima2013,
author = {Lima, P. A. L. and Resende, C. X. and Soares, G. D. D. and Anselme, K. and Almeida, L. E.},
title = {Preparation, characterization and biological test of 3D-scaffolds based on chitosan, fibroin and hydroxyapatite for bone tissue engineering},
journal = {Materials Science & Engineering C-materials For Biological Applications},
year = {2013},
volume = {33},
number = {6},
pages = {3389--3395},
doi = {http://doi.org/10.1016/j.msec.2013.04.026}
}
|
|||||
| Limousy, L., Dutournie, P. and Chevereau-Landais, E. | Description of the preferential transport of monovalent salts through Na-mordenite membrane: Physico-chemical aspects | 2013 | Microporous and Mesoporous Materials Vol. 167, pp. 133-136 |
article | DOI |
| Abstract: A Na-mordenite membrane was prepared by using sol-gel synthesis protocol, and spin-coating was chosen as the impregnation methodology. The gel was impregnated onto commercial ceramic tubular support (alpha-alumina) and surface characterizations were carried out on Na-mordenite powder prepared with the same gel. The Na-mordenite surface charge is not appreciably modified by a contact with monovalent or divalent salts. The average pore diameter was estimated in the range of 8 nm. Previous results showed that monovalent salts were not retained by the stabilized Na-mordenite membrane while after an alkaline treatment, rejections were observed according to the order of hydration energies (NaF > NaCl > NaBr > NaI). After an acid cleaning, the membrane recovered its initial properties. A new estimation of average pore radius proved that steric effects were not responsible for rejection themselves. A new filtration test of mixed monovalent salt solution was carried out. Fluoride ions were retained by a majority while the others were almost not retained. Infrared characterizations indicate that, after an alkaline treatment, surface chemistry modifications may be at the origin of these interactions. Especially, the apparition of an ultrapolar layer all over the Na-mordenite surface greatly modifies Van der Waals interactions between the hydrated anions and the Na-mordenite surface. (C) 2012 Elsevier Inc. All rights reserved. | |||||
BibTeX:
@article{Limousy2013,
author = {Limousy, L. and Dutournie, P. and Chevereau-Landais, E.},
title = {Description of the preferential transport of monovalent salts through Na-mordenite membrane: Physico-chemical aspects},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {167},
pages = {133--136},
doi = {http://doi.org/10.1016/j.micromeso.2012.01.025}
}
|
|||||
| Limousy, L., Jeguirim, M., Dutournie, P., Kraiem, N., Lajili, M. and Said, R. | Gaseous products and particulate matter emissions of biomass residential boiler fired with spent coffee grounds pellets | 2013 | Fuel Vol. 107, pp. 323-329 |
article | DOI |
| Abstract: In this present work, energetic characteristics and combustion behavior of agro-pellets, produced from pure spent coffee grounds (SCGs) or blended with pine sawdust in a commercial residential pellet boiler, were examined. Hence, thermal and chemical properties such as calorific value, ash content, bulk density, fixed carbon and elemental analysis obtained from blend and pure biomasses were firstly examined. Moreover, combustion tests were performed in 8-12 kW Okofen Boiler, carbon monoxide (CO) and volatile organic compounds (VOCs) were analyzed according to French standards. The emissions of some gases were also monitored during combustion tests: O-2, CO2, NO and NO2. An Electrical Low Pressure Impactor (ELPI) was used to collect particles from 29 nm to 10 mu m into 12 size fractions to determine mass and number concentrations. The exhaust gaseous and particles emissions of SCG and blend pellets were compared with emissions of wood pellets (DIN + standard). It was found that, despite its high LHV, the use of pure SCG as fuel lead to a lower boiler efficiency, which was followed by an increase of particle and gas emissions. However, when SCG was mixed with pine sawdust (50/50 wt.%), combustion parameters (emissions and boiler efficiency) were very close to those obtained for wood pellets. According to the presented results, although it seems reasonable to consider SCG pellets as a promising alternative fuel, the use of SCG blending up to 50% with pine sawdust is essential to meet French Standards (NF agro-pellets). Hence, this pellets production may be a promising issue for SCG valorisation. (c) 2012 Elsevier Ltd. All rights reserved. | |||||
BibTeX:
@article{Limousy2013a,
author = {Limousy, L. and Jeguirim, M. and Dutournie, P. and Kraiem, N. and Lajili, M. and Said, R.},
title = {Gaseous products and particulate matter emissions of biomass residential boiler fired with spent coffee grounds pellets},
journal = {Fuel},
year = {2013},
volume = {107},
pages = {323--329},
doi = {http://doi.org/10.1016/j.fuel.2012.10.019}
}
|
|||||
| Maafa, I., Hajjar-Garreau, S., Jaafar, R., Berling, D., Pirri, C., Mehdaoui, A., Denys, E., Florentin, A. and Garreau, G. | Room-temperature ferromagnetism of all-epitaxial beta-Fe-Ge/diamond-Ge/beta-Fe-Ge trilayers | 2013 | Journal of Physics-condensed Matter Vol. 25(25), pp. 256007 |
article | DOI |
| Abstract: We report on the first all-epitaxial ferromagnet/inorganic semiconductor/ferromagnet hybrid heterostructure that exhibits (i) a Ge barrier of diamond crystal structure, (ii) room-temperature ferromagnetic electrodes and (iii) very smooth interfaces. Both bottom- and top-Fe-Ge electrodes exhibit tiny in-plane magnetic anisotropies dominated by a magnetocrystalline contribution of six-fold symmetry originating from the hexagonal symmetry of the B8(2) (Ni2In) beta-Fe-Ge phase. A key result is the absence of any magnetic coupling between these soft-magnetic electrodes for Ge barrier thickness as low as similar to 2.5 nm, which allows us to easily tune the parallel and antiparallel magnetic alignments by applying suitably small magnetic fields. This confirms the beneficial use of H-surfactant in order to drastically reduce the roughness of the Ge barrier, as revealed by our scanning tunneling microscopy and transmission electron microscopy measurements. This new all-epitaxial ferromagnet/semiconductor hybrid system appears, therefore, to be a promising candidate for the realization of magnetic tunnel junctions with a single crystal semiconductor barrier that are fully compatible with Si-based technology. | |||||
BibTeX:
@article{Maafa2013,
author = {Maafa, I. and Hajjar-Garreau, S. and Jaafar, R. and Berling, D. and Pirri, C. and Mehdaoui, A. and Denys, E. and Florentin, A. and Garreau, G.},
title = {Room-temperature ferromagnetism of all-epitaxial beta-Fe-Ge/diamond-Ge/beta-Fe-Ge trilayers},
journal = {Journal of Physics-condensed Matter},
year = {2013},
volume = {25},
number = {25},
pages = {256007},
doi = {http://doi.org/10.1088/0953-8984/25/25/256007}
}
|
|||||
| Maafa, I., Jaafar, R., Hajjar-Garreau, S., Berling, D., Mehdaoui, A., Pirri, C., Deny, E., Florentin, A., Uhlaq-Bouillet, C. and Garreau, G. | Interfacial properties of all-epitaxial Fe-Ge/Ge heterostructures on Ge(111) [BibTeX] |
2013 | Thin Solid Films Vol. 545, pp. 257-266 |
article | DOI |
BibTeX:
@article{Maafa2013a,
author = {Maafa, I. and Jaafar, R. and Hajjar-Garreau, S. and Berling, D. and Mehdaoui, A. and Pirri, C. and Deny, E. and Florentin, A. and Uhlaq-Bouillet, C. and Garreau, G.},
title = {Interfacial properties of all-epitaxial Fe-Ge/Ge heterostructures on Ge(111)},
journal = {Thin Solid Films},
year = {2013},
volume = {545},
pages = {257--266},
doi = {http://doi.org/10.1016/j.tsf.2013.08.055}
}
|
|||||
| Mathieu, Y., Tzanis, L., Soulard, M., Patarin, J., Vierling, M. and Moliere, M. | Adsorption of SOx by oxide materials: A review | 2013 | Fuel Processing Technology Vol. 114, pp. 81-100 |
article | DOI |
| Abstract: This paper is an attempt to provide a review as extensive as feasible of the literature devoted to the wide variety of sorbent systems that are currently either in use or under laboratory investigation for the removal of the SOx (SO2 + SO3) from flue gases. From an industrial perspective and besides any economic consideration, "the ideal" SOx sorbent candidate must ally four essential qualities some of which may appear contradictory to some extent: a strong affinity of the sorbent towards SO, along with fast kinetics; a large specific surface; a high physical/thermal/chemical stability and the capability for multiple regenerations at a reasonable temperature and with performance recoveries close to 100%. In this paper, the sorbent are classified in four categories which are: (i) single oxides; (ii) mixed oxides (including spinels and alumina supported oxides); (iii) oxides supported on carbonaceous materials and (iv) oxides supported on zeolites and mesoporous materials. A noteworthy outcome of this review lies in the promising prospects offered by porous silica-based materials as desulfurization ("DeSOx") candidates and the interest of elaborating in this direction. (C) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Mathieu2013,
author = {Mathieu, Y. and Tzanis, L. and Soulard, M. and Patarin, J. and Vierling, M. and Moliere, M.},
title = {Adsorption of SOx by oxide materials: A review},
journal = {Fuel Processing Technology},
year = {2013},
volume = {114},
pages = {81--100},
doi = {http://doi.org/10.1016/j.fuproc.2013.03.019}
}
|
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| Mercury, M., Zouaoui, N., Simon-Masseron, A., Zerega, Y., Reynard-Carette, C., Denoyel, R., Carette, M., Soulard, M., Janulyte, A. and Patarin, J. | Adsorption of 2,3-DCDD on FAU and EMT-type zeolites: Influence of the nature and the content of charge compensating cations | 2013 | Microporous and Mesoporous Materials Vol. 177(0), pp. 25-31 |
article | URL |
| Abstract: Abstract The nature and the content of exchangeable cations in FAU and EMT-type zeolites on the adsorption of dioxin are investigated. These zeolites are selected due to their pore openings, close to the diameter of the 2, 3-dichlorodibenzo-p-dioxin (0.74 nm). In this study, the sodium cations, which balance the negative charge of the zeolitic framework, are replaced by other cationic species such as H+, Mg2+, Li+, Ca2+, K+ and Ag+. The structural and textural analyses performed on the exchanged zeolites indicate that the exchange reaches 70 to 98% and the structure of zeolites is preserved during the exchange process. For both zeolite structure types, the dioxin adsorption rates are the highest for the sodium forms followed by the calcium forms. The following order is obtained: Na+> Ca2+ = Li+> Mg2+= Ag+> K+. It is also noticed that for a same type of zeolite (FAU), the adsorption rate is inversely proportional to the framework Si/Al molar ratio which is related to the content of sodium cations. | |||||
BibTeX:
@article{Mercury2013,
author = {Mercury, Maud and Zouaoui, Nabila and Simon-Masseron, Angélique and Zerega, Yves and Reynard-Carette, Christelle and Denoyel, Renaud and Carette, Michel and Soulard, Michel and Janulyte, Aurika and Patarin, Joël},
title = {Adsorption of 2,3-DCDD on FAU and EMT-type zeolites: Influence of the nature and the content of charge compensating cations},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {177},
number = {0},
pages = {25-31},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113001704}
}
|
|||||
| Mokbel, H., Dumur, F., Telitel, S., Vidal, L., Xiao, P., Versace, D.-L., Tehfe, M.-A., Morlet-Savary, F., Graff, B., Fouassier, J.-P., Gigmes, D., Toufaily, J., Hamieh, T. and Lalevee, J. | Photoinitiating systems of polymerization and in situ incorporation of metal nanoparticles into polymer matrices upon exposure to visible light: push-pull malonate and malononitrile based dyes | 2013 | Polym. Chem. Vol. 4(23), pp. 5679-5687 |
article | URL |
| Abstract: Novel push-pull dyes containing a (substituted) hydrocarbon moiety and a malonate (or a malononitrile) moiety are proposed as photoinitiators for the ring opening polymerization of epoxides as well as the synthesis of interpenetrated polymer networks (IPNs) upon exposure to visible light (laser diode, halogen lamp, etc.). Excellent polymerization profiles are obtained. The role of the acceptor and donor moieties in these dyes towards their light absorption properties, the associated photochemical processes and their photoinitiating ability is investigated. A very efficient dye has been selected for the reduction of Ag+ and the in situ formation of Ag(0) nanoparticles in the synthesized IPNs. | |||||
BibTeX:
@article{Mokbel2013,
author = {Mokbel, Haifaa and Dumur, Frederic and Telitel, Sofia and Vidal, Loic and Xiao, Pu and Versace, Davy-Louis and Tehfe, Mohamad-Ali and Morlet-Savary, Fabrice and Graff, Bernadette and Fouassier, Jean-Pierre and Gigmes, Didier and Toufaily, Joumana and Hamieh, Tayssir and Lalevee, Jacques},
title = {Photoinitiating systems of polymerization and in situ incorporation of metal nanoparticles into polymer matrices upon exposure to visible light: push-pull malonate and malononitrile based dyes},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
number = {23},
pages = {5679--5687},
url = {http://dx.doi.org/10.1039/C3PY00846K}
}
|
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| Moller-Siegert, J., Parmentier, J., anselme , k. and vix-guterl , C. | Mesoporous hydroxyapatite by hard templating of silica and carbon foams for protein release | 2013 | J.Mater. Sci Vol. 48(10), pp. 3722-3730 |
article | DOI |
| Abstract: Calcium phosphates, particularly hydroxyapatite Ca10(PO4)6(OH)2 (HA), are widely used for bone regeneration due to their biocompatibility and good resorption properties. However, their performance upon implantation is improved when they are associated with bioactive molecules such as growth factors. Using mesoporous HA leads to improved protein adsorption and release kinetics because the diameter of the mesopores (2–50 nm) is in the same range as their size. We prepared this type of material by the nanocasting method using three different templates: a silica foam and two carbon templates derived from it using propylene or sucrose as carbon source. We investigated the influence of the template, the calcination temperature and of the conditions during template removal. We obtained HA materials with a surface area of up to 90 m2 g−1 and with an intergranular mesopore volume of up to 0.4 cm3 g−1. In this paper, we show for the first time that the synthesis of mesoporous HA from a mesoporous silica foam template allows eliminating the template at lower temperatures (in an alkaline medium), thus preventing the sintering of the HA. These materials have interesting properties for drug delivery applications. The protein adsorption and release capacities of these HAs were tested with two model proteins, bovine serum albumin (BSA), and Cytochrome C. These materials are an important milestone for future bone regeneration systems based on HA associated with human growth factor proteins. | |||||
BibTeX:
@article{Moller-Siegert2013,
author = {Moller-Siegert, J. and Parmentier, J. and anselme, k. and vix-guterl, C.},
title = {Mesoporous hydroxyapatite by hard templating of silica and carbon foams for protein release},
journal = {J.Mater. Sci},
year = {2013},
volume = {48},
number = {10},
pages = {3722-3730},
doi = {http://doi.org/10.1007/s10853-013-7170-7}
}
|
|||||
| Muller, A., Demouge, F., Jeguirim, M. and Fromy, P. | SCHEMA-SI: A hybrid fire safety engineering tool Part II: Case study | 2013 | Fire Safety Journal Vol. 58(0), pp. 58-64 |
article | URL |
| Abstract: SCHEMA-SI is an engineering tool able to evaluate the performance of building fire safety system. It uses a dynamic hybrid model, which means that discrete events and continuous phenomena are interconnected at every instant. The model has been developed as a tool to assist fire protection engineers in performing fire safety engineering calculations. This tool may be also used to conduct risk assessments and to evaluate the efficiency of selected design strategies in case of fire in a specific building. Part I of this paper describes SCHEMA-SI tool basis. This paper focuses on a real case study. The case study aims at evaluating and comparing four fire safety strategies in a French hotel. | |||||
BibTeX:
@article{Muller2013,
author = {Muller, A. and Demouge, F. and Jeguirim, M. and Fromy, Ph.},
title = {SCHEMA-SI: A hybrid fire safety engineering tool Part II: Case study},
journal = {Fire Safety Journal},
year = {2013},
volume = {58},
number = {0},
pages = {58--64},
url = {http://www.sciencedirect.com/science/article/pii/S0379711213000246}
}
|
|||||
| Navarrete, P., Pizzi, A., Pasch, H., Rode, K. and Delmotte, L. | Characterization of two maritime pine tannins as wood adhesives [BibTeX] |
2013 | Journal of Adhesion Science and Technology Vol. 27(22), pp. 2462-2479 |
article | |
BibTeX:
@article{Navarrete2013,
author = {Navarrete, P. and Pizzi, A. and Pasch, H. and Rode, K. and Delmotte, L.},
title = {Characterization of two maritime pine tannins as wood adhesives},
journal = {Journal of Adhesion Science and Technology},
year = {2013},
volume = {27},
number = {22},
pages = {2462--2479}
}
|
|||||
| Ni, L., Rigolet, S., Chemtob, A., Croutxé-Barghorn, C., Brendlé, J. and Vidal, L. | Head-to-head and head-to-tail multilayer n-alkylsilsesquioxane films | 2013 | Comptes Rendus Chimie Vol. 16(10), pp. 897-905 |
article | URL |
| Abstract: Abstract Two lamellar organosilica films made up of stacks of head-to-head and head-to-tail alkyl bilayers were synthesized by a UV-driven polymerization of n-C18H37SiCl3 and n-C18H37Si(OCH3)3, respectively. In addition to thermogravimetry and small-angle X-ray scattering, the characterization of these multilayer systems was focused on a variety of multinuclear solid-state NMR methods (1H, 29Si, 13C, 2D WISE). The chemical structure of the siloxane interlayer, the alkyl chain conformation and thermal stability were systematically investigated and compared. Through its marked sensitivity to molecular motion, solid-state NMR was used to investigate the effect of interdigitation on alkyl chain dynamics. | |||||
BibTeX:
@article{Ni2013a,
author = {Ni, Lingli and Rigolet, Séverinne and Chemtob, Abraham and Croutxé-Barghorn, Céline and Brendlé, Jocelyne and Vidal, Loïc},
title = {Head-to-head and head-to-tail multilayer n-alkylsilsesquioxane films},
journal = {Comptes Rendus Chimie},
year = {2013},
volume = {16},
number = {10},
pages = {897--905},
url = {http://www.sciencedirect.com/science/article/pii/S1631074813001859}
}
|
|||||
| Nicollin, A., Zhou, X., Pizzi, A., Grigsby, W., Rode, K. and Delmotte, L. | MALDI-TOF and 13C NMR analysis of a renewable resource additive-Thermoplastic acetylated tannins | 2013 | Vol. 49Industrial Crops and Products, pp. 851-857 |
article | URL |
| Abstract: Acetylation of mimosa flavonoid tannin is easy to occur but to proceed to completion needs the presence of a catalyst. The acetylated tannin has been shown to be composed of flavonoid oligomers of different levels of acetylation in which the robinetinidin flavonoid unit predominates. All the different OH groups of the flavonoids, both phenolic and alcoholic, are subject to acetylation. Whatever the level of acetylation the acetylated tannin loses its solubility in water and becomes thermoplastic. In the case of the mimosa extract used here the predominance of acetylated B-flavonoid units is exclusively due to the predominance of B-type units, both robinetinidin and catechin, in the original tannin. © 2013 Elsevier B.V. | |||||
BibTeX:
@article{Nicollin2013,
author = {Nicollin, A. and Zhou, X. and Pizzi, A. and Grigsby, W. and Rode, K. and Delmotte, L.},
title = {MALDI-TOF and 13C NMR analysis of a renewable resource additive-Thermoplastic acetylated tannins},
booktitle = {Industrial Crops and Products},
year = {2013},
volume = {49},
pages = {851--857},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880972291&doi=10.1016%2fj.indcrop.2013.06.013&partnerID=40&md5=89f3240be49042d512242ab63fa80ff5}
}
|
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| Niu, S., Schneider, R., Vidal, L. and Balan, L. | Thioxanthone functionalized silver nanorods as smart photoinitiating assemblies to generate photopolymer/metal nano-objects | 2013 | Nanoscale Vol. 5(14), pp. 6538-6544 |
article | URL |
| Abstract: Silver nanorods (AgNRs) with lengths in the 50-60 nm range were synthesized and functionalized with 2-(2-mercaptoethyl)thioxanthone (C2TX) to generate AgNR@C2TX nanoassemblies. When irradiated at 377 nm in the presence of a diacrylate monomer, these dispersed nanoassemblies initiate radical photopolymerization, indicating that the excited singlet to triplet intersystem crossing process of C2TX in the vicinity of AgNRs was favored while the fluorescence of C2TX was completely quenched at the surface of NRs. SEM and TEM images confirmed the formation of a AgNR-polymer nanocomposite and the homogeneous dispersion of AgNRs in the polymer film. Moreover, under specific experimental conditions allowing the spatial extent of the polymerization to be limited, polymer-capped AgNRs were obtained (polymer diameter of ca. 1 nm). | |||||
BibTeX:
@article{Niu2013,
author = {Niu, Songlin and Schneider, Raphael and Vidal, Loic and Balan, Lavinia},
title = {Thioxanthone functionalized silver nanorods as smart photoinitiating assemblies to generate photopolymer/metal nano-objects},
journal = {Nanoscale},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {5},
number = {14},
pages = {6538--6544},
url = {http://dx.doi.org/10.1039/C3NR01256E}
}
|
|||||
| Odarchenko, Y., Sijbrandi, N., Rosenthal, M., Kimenai, A., Mes, E., Broos, R., Bar, G., Dijkstra, P., Feijen, J. and Ivanov, D. | Structure formation and hydrogen bonding in all-aliphatic segmented copolymers with uniform hard segments | 2013 | Acta Biomaterialia Vol. 9(4), pp. 6143-6149 |
article | URL |
| Abstract: Fully aliphatic segmented poly(ether ester amide) copolymers with uniform hard segments prepared by melt polycondensation of α,ω-hydroxyl end-functionalized polytetrahydrofuran and short glycine or β-alanine bisester-bisoxalamide units hold promise for biomedical applications. For polymers with the hard block contents varying from 10% to 27%, differential scanning calorimetry and atomic force microscopy reveal a highly phase-separated morphology, with ribbon-like nanocrystals dispersed in the soft segment matrix. To relate the polymer properties to the structure of the hard segment, the monomers were prepared and studied by optical and X-ray diffraction measurements. It was shown that the glycine and β-alanine carbonyl ester groups are tilted away from the oxalamide plane, which can affect the degradation rate via hydrolysis of the ester bond. | |||||
BibTeX:
@article{Odarchenko2013,
author = {Odarchenko, Ya.I. and Sijbrandi, N.J. and Rosenthal, M. and Kimenai, A.J. and Mes, E.P.C. and Broos, R. and Bar, G. and Dijkstra, P.J. and Feijen, J. and Ivanov, D.A.},
title = {Structure formation and hydrogen bonding in all-aliphatic segmented copolymers with uniform hard segments},
journal = {Acta Biomaterialia},
year = {2013},
volume = {9},
number = {4},
pages = {6143--6149},
url = {http://www.sciencedirect.com/science/article/pii/S1742706112004758}
}
|
|||||
| Ortiz, G., Nouali, H., Marichal, C., Chaplais, G. and Patarin, J. | Energetic performances of the metal-organic framework ZIF-8 obtained using high pressure water intrusion-extrusion experiments | 2013 | Phys. Chem. Chem. Phys. Vol. 15(14), pp. 4888-4891 |
article | URL |
| Abstract: The "ZIF-8-water" system displays reproducible shock-absorber behaviour over several cycles with a stored energy of 13.3 J g-1 and an energy yield close to 85%. The combination of the main features evidenced for ZIF-8, i.e. a quite low intrusion pressure and a high stored energy, opens a field for new applications. | |||||
BibTeX:
@article{Ortiz2013,
author = {Ortiz, Guillaume and Nouali, Habiba and Marichal, Claire and Chaplais, Gerald and Patarin, Joel},
title = {Energetic performances of the metal-organic framework ZIF-8 obtained using high pressure water intrusion-extrusion experiments},
journal = {Phys. Chem. Chem. Phys.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {15},
number = {14},
pages = {4888--4891},
url = {http://dx.doi.org/10.1039/C3CP00142C}
}
|
|||||
| Ovramenko, T., Spillebout, F., Bocquet, F.C., Mayne, A.J., Dujardin, G., Sonnet, P., Stauffer, L., Ksari, Y. and Themlin, J.M. | STM imagery and density functional calculations of C-60 fullerene adsorption on the 6H-SiC(0001)-3x3 surface | 2013 | Physical Review B Vol. 87(15), pp. 155421 |
article | DOI |
| Abstract: Scanning tunneling microscopy (STM) studies of the fullerene C-60 molecule adsorbed on the silicon carbide SiC(0001)-3 x 3 surface, combined with density functional theory (DFT) calculations, show that chemisorption of individual C-60 molecules occurs through the formation of one bond to one silicon adatom only in contrast to multiple bond formation on other semiconducting surfaces. We observe three stable adsorption sites with respect to the Si adatoms of the surface unit cell. Comprehensive DFT calculations give different adsorption energies for the three most abundant sites showing that van der Waals forces between the C-60 molecule and the neighboring surface atoms need to be considered. The C-60 molecules are observed to form small clusters even at low coverage indicating the presence of a mobile molecular precursor state and nonnegligible intermolecular interactions. DOI: 10.1103/PhysRevB.87.155421 | |||||
BibTeX:
@article{Ovramenko2013,
author = {Ovramenko, T. and Spillebout, F. and Bocquet, F. C. and Mayne, A. J. and Dujardin, G. and Sonnet, P. and Stauffer, L. and Ksari, Y. and Themlin, J. M.},
title = {STM imagery and density functional calculations of C-60 fullerene adsorption on the 6H-SiC(0001)-3x3 surface},
journal = {Physical Review B},
year = {2013},
volume = {87},
number = {15},
pages = {155421},
doi = {http://doi.org/10.1103/PhysRevB.87.155421}
}
|
|||||
| Palmieri, M., Hajjar-Garreau, S., Fioux, P., Airoudj, A., Roucoules, V., Vallat, M.-F. and Nardin, M. | Influence of Covalent Bonds on the Adhesion Energy at Elastomer-Glass Interfaces | 2013 | The Journal of Adhesion Vol. 89(5)The Journal of Adhesion, pp. 398-415 |
article | DOI URL |
| Abstract: The aim of this study was to analyze the effect of interfacial covalent bonds on the adhesive behavior of an elastomer, a crosslinked polydimethylsiloxane, and a glass substrate. These covalent bonds were created by applying to both materials an appropriate surface treatment by means of plasma polymerization. Adhesion measurements were carried out by analyzing the contact area between a rubber hemisphere and a flat rigid glass plate. The contact was forced under a given compressive loading for different times tc, then the load was removed and the fracture propagation at the interface was recorded as a function of relaxation time tr. Finally, adhesion energies were also determined by means of a probe test using a tensile testing machine. The aim of this study was to analyze the effect of interfacial covalent bonds on the adhesive behavior of an elastomer, a crosslinked polydimethylsiloxane, and a glass substrate. These covalent bonds were created by applying to both materials an appropriate surface treatment by means of plasma polymerization. Adhesion measurements were carried out by analyzing the contact area between a rubber hemisphere and a flat rigid glass plate. The contact was forced under a given compressive loading for different times tc, then the load was removed and the fracture propagation at the interface was recorded as a function of relaxation time tr. Finally, adhesion energies were also determined by means of a probe test using a tensile testing machine. | |||||
BibTeX:
@article{Palmieri2013,
author = {Palmieri, Marie and Hajjar-Garreau, Samar and Fioux, Philippe and Airoudj, Aissam and Roucoules, Vincent and Vallat, Marie-France and Nardin, Michel},
title = {Influence of Covalent Bonds on the Adhesion Energy at Elastomer-Glass Interfaces},
booktitle = {The Journal of Adhesion},
journal = {The Journal of Adhesion},
publisher = {Taylor & Francis},
year = {2013},
volume = {89},
number = {5},
pages = {398--415},
url = {http://dx.doi.org/10.1080/00218464.2013.757520},
doi = {http://doi.org/10.1080/00218464.2013.757520}
}
|
|||||
| Pan, X.C., Vallet, A.L., Schweizer, S., Dahbi, K., Delpech, B., Blanchard, N., Graff, B., Geib, S.J., Curran, D.P., Lalevee, J. and Lacote, E. | Mechanistic and Preparative Studies of Radical Chain Homolytic Substitution Reactions of N-Heterocyclic Carbene Boranes and Disulfides | 2013 | Journal of the American Chemical Society Vol. 135(28), pp. 10484-10491 |
article | DOI |
| Abstract: Reactions of 1,3-dimethylimidazol-2-ylidene-borane (diMe-Imd-BH3) and related NHC-boranes with diaryl and diheteroaryl disulfides provide diverse NHC-boryl monosulfides (diMe-Imd-BH2SAr) and NHC-boryl disulfides (diMe-Imd-BH(SAr)(2)). Heating in the dark with 1 equiv of disulfide favors monosulfide formation, while irradiation with 2 equiv disulfide favors disulfide formation. With heteroaryl disulfides, the NHC-borane in the primary NHC-boryl sulfide product migrates from sulfur to nitrogen to give new products with a thioamide substructure. Most substitution reactions are thought to proceed through radical chains in which homolytic substitution of a disulfide by an NHC-boryl radical is a key step. However, with electrophilic disulfides under dark conditions, a competing ionic path may also be possible. | |||||
BibTeX:
@article{Pan2013,
author = {Pan, X. C. and Vallet, A. L. and Schweizer, S. and Dahbi, K. and Delpech, B. and Blanchard, N. and Graff, B. and Geib, S. J. and Curran, D. P. and Lalevee, J. and Lacote, E.},
title = {Mechanistic and Preparative Studies of Radical Chain Homolytic Substitution Reactions of N-Heterocyclic Carbene Boranes and Disulfides},
journal = {Journal of the American Chemical Society},
year = {2013},
volume = {135},
number = {28},
pages = {10484--10491},
doi = {http://doi.org/10.1021/ja403627k}
}
|
|||||
| Pan, X.C., Lalevee, J., Lacote, E. and Curran, D.P. | Disulfides and Boryl Sulfides Serve as both Initiators and Precatalysts in Radical Reductions of Halides by an N-Heterocyclic Carbene⋅Borane | 2013 | Adv. Synth. Catal. Vol. 355(18), pp. 3522-3526 |
article | DOI |
| Abstract: Diphenyl disulfide (PhSSPh), a typical boryl monosulfide (diiPr-Imd-BH2SPh) and a typical boryl bis-sulfide [diMe-Imd-BH(SPh)2] all serve as both initiators and precatalysts in the reduction of alkyl and aryl halides by readily available 1,3-dimethylimidazol-2-ylidene⋅borane (diMe-Imd-BH3). The reactions are suggested to occur by a polarity reverse catalysis mechanism where in situ generated thiophenol is the active catalyst. | |||||
BibTeX:
@article{Pan2013a,
author = {Pan, X. C. and Lalevee, J. and Lacote, E. and Curran, D. P.},
title = {Disulfides and Boryl Sulfides Serve as both Initiators and Precatalysts in Radical Reductions of Halides by an N-Heterocyclic Carbene⋅Borane},
journal = {Adv. Synth. Catal.},
year = {2013},
volume = {355},
number = {18},
pages = {3522-3526},
doi = {http://doi.org/10.1002/adsc.201300752}
}
|
|||||
| Peralta, D., Chaplais, G., Paillaud, J.-L., Simon-Masseron, A., Barthelet, K. and Pirngruber, G.D. | The separation of xylene isomers by ZIF-8: a demonstration of the extraordinary flexibility of the ZIF-8 framework | 2013 | Microporous and Mesoporous Materials Vol. 173, pp. 1-5 |
article | URL |
| Abstract: The present work describes the adsorption and separation of xylene isomers by ZIF-8. Although the formal pore diameter of ZIF-8 is much smaller than the molecular diameter of the xylene isomers, ZIF-8 is able to separate the isomers by molecular sieving. A structural study indicates that the diffusion of the xylenes into the pore structure of ZIF-8 happens via a transitory deformation of the pore aperture which is based on a tilt of the imidazolate linkers, followed by a return to the initial conformation. The rate of adsorption depends on the size of the isomer, i.e. it decreases from para- to meta- and to ortho-xylene. The separation of the xylene isomers is good in the gas phase. In liquid phase breakthrough experiments, the quality of the separation is deteriorated. Moreover, as expected for a separation based on molecular sieving, para-xylene cannot be well separated from ethyl-benzene. | |||||
BibTeX:
@article{Peralta2013,
author = {Peralta, David and Chaplais, Gérald and Paillaud, Jean-Louis and Simon-Masseron, Angélique and Barthelet, Karin and Pirngruber, Gerhard D.},
title = {The separation of xylene isomers by ZIF-8: a demonstration of the extraordinary flexibility of the ZIF-8 framework},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {173},
pages = {1-5},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113000322}
}
|
|||||
| Pintor, M.-J., Jean-Marius, C., Jeanne-Rose, V., Taberna, P.-L., Simon, P., Gamby, J., Gadiou, R. and Gaspard, S. | Preparation of activated carbon from Turbinaria turbinata seaweeds and its use as supercapacitor electrode materials | 2013 | Comptes Rendus Chimie Vol. 16(1)Electrochemistry and Nanotechnologies: The new challenges Electrochemistry and Nanotechnologies: The new challenges, pp. 73-79 |
article | URL |
| Abstract: Turbinaria turbinata brown seaweeds were tested as carbon electrode material in symmetric, electrochemical supercapacitors. The electrochemical properties of the carbon materials were characterised for their application as supercapacitors using cyclic voltammetry, galvanostatic charge/discharge method and electrochemical impedance spectroscopic analyses. Our initial results showed that the optimal behaviour was obtained for the sample prepared by pyrolysis at 800 °C. The average surface area of the carbon was 812 m2/g. Electrochemical tests with an organic electrolyte gave the following interesting results: a capacitance of 74.5 F/g, a specific series resistance of 0.5 Ω cm2 and an ionic resistivity of 1.3 Ω cm2. These results show the promising capacitive properties of carbon derived from seaweeds and their application in electrochemical supercapacitors. | |||||
BibTeX:
@article{Pintor2013,
author = {Pintor, Marie-Julie and Jean-Marius, Corine and Jeanne-Rose, Valérie and Taberna, Pierre-Louis and Simon, Patrice and Gamby, Jean and Gadiou, Roger and Gaspard, Sarra},
title = {Preparation of activated carbon from Turbinaria turbinata seaweeds and its use as supercapacitor electrode materials},
booktitle = {Electrochemistry and Nanotechnologies: The new challenges Electrochemistry and Nanotechnologies: The new challenges},
journal = {Comptes Rendus Chimie},
year = {2013},
volume = {16},
number = {1},
pages = {73--79},
url = {http://www.sciencedirect.com/science/article/pii/S163107481200327X}
}
|
|||||
| Reinholdt, M.X., Brendle, J., Tuilier, M.-H., Kaliaguine, S. and Ambroise, E. | Hydrothermal Synthesis and Characterization of Ni-Al Montmorillonite-Like Phyllosilicates | 2013 | Nanomaterials Vol. 3(1), pp. 48-69 |
article | DOI |
| Abstract: This work describes the first hydrothermal synthesis in fluoride medium of Ni-Al montmorillonite-like phyllosilicates, in which the only metallic elements in the octahedral sheet are Ni and Al. X-ray diffraction, chemical analysis, thermogravimetric and differential thermal analysis, scanning electron microscopy and transmission electron microscopy confirm that the synthesized samples are montmorillonite-like phyllosilicates having the expected chemical composition. The specific surface areas of the samples are relatively large (>100 m(2) g(-1)) compared to naturally occurring montmorillonites. Si-29 and Al-27 nuclear magnetic resonance (NMR) indicate substitutions of Al for Si in the tetrahedral sheet. F-19 NMR and Ni K-edge extended X-ray absorption fine structure (EXAFS) local probes highlight a clustering of the metal elements and of the vacancies in the octahedral sheet of the samples. These Ni-Al phyllosilicates exhibit a higher local order than in previously synthesized Zn-Al phyllosilicates. Unlike natural montmorillonites, where the distribution of transition metal cations ensures a charge equilibrium allowing a stability of the framework, synthetic montmorillonites entail clustering and instability of lattice when the content of divalent element in the octahedral sheet exceeds ca. 20%. Synthesis of Ni-Al montmorillonite-like phyllosilicates, was successfully achieved for the first time. These new synthetic materials may find potential applications as catalysts or as materials with magnetic, optical or staining properties. | |||||
BibTeX:
@article{Reinholdt2013a,
author = {Reinholdt, Marc X. and Brendle, Jocelyne and Tuilier, Marie-Helene and Kaliaguine, Serge and Ambroise, Emmanuelle},
title = {Hydrothermal Synthesis and Characterization of Ni-Al Montmorillonite-Like Phyllosilicates},
journal = {Nanomaterials},
year = {2013},
volume = {3},
number = {1},
pages = {48--69},
doi = {http://doi.org/10.3390/nano3010048}
}
|
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| Rhouta, B., Zatile, E., Bouna, L., Lakbita, O., Maury, F., Daoudi, L., Lafont, M.C., Amjoud, M., Senocq, F., Jada, A. and Aghzzaf, A.A. | Comprehensive physicochemical study of dioctahedral palygorskite-rich clay from Marrakech High Atlas (Morocco) | 2013 | Physics and Chemistry of Minerals Vol. 40(5), pp. 411-424 |
article | DOI |
| Abstract: This study is devoted to the physicochemical and mineralogical characterizations of palygorskite from Marrakech High Atlas, Morocco. The raw clay and its Na+-saturated < 2 mu m fraction were characterized using chemical, structural, and thermal analytical techniques. Measurements of specific surface area and porous volume are reported. The clay fraction was found to be made up of 95 % of palygorskite and 5 % of sepiolite. An original feature of this palygorskite is its deficiency in zeolitic H2O. The half-cell structural formula of its dehydrated form was determined on the basis of 21 oxygens to be (Si7.92Al0.08)(Mg2.15Al1.4Fe0.4Ti0.05 )(Ca0.03Na0.08K0.04)O-21, while the hydrated form could be formulated as (Si7.97Al0.03)(Mg2.17Al1.46Fe0.40Ti0.05)(Ca0.03Na0.07K0,03)O-20.18(OH)(1.94)(OH2)(3.88)center dot 2.43 H2O. These formulas show that the (Al3++Fe3+)/Mg2+ ratio is around 0.84, revealing a pronounced dioctahedral character. Further, inside its octahedral sheet, it was determined that the inner M-1 sites are occupied by vacancies, whereas the M-2 sites are shared between 90 % of trivalent cations (78 % for Al3+ and 22 % for Fe3+), 7.5 % of Mg2+, and 2.5 % of Ti4+, all of them linked to 1.94 of structural hydroxyls. The two remaining Mg2+ by half-cell occupy edge M-3 sites and are coordinated to 3.88 molecules of OH2. Channels of this palygorskite are deficient in zeolitic H2O since they contain only 2.43 H2O molecules. A correlation was found between these results and the observation of very intense and well-resolved FTIR bands arising from dioctahedral domains (mainly Al2OH, Fe2OH, and AlFeOH) along with very small responses from a trioctahedral domain (Mg3OH). Accordingly, a schematic representation of the composition of the octahedral sheet was proposed. The cation exchange capacity, specific surface area, and total pore volume were also assessed to be ca. 21.2 meq/100 g, 116 m(2)/g, and 0.458 cm(3)/g, respectively. | |||||
BibTeX:
@article{Rhouta2013a,
author = {Rhouta, B. and Zatile, E. and Bouna, L. and Lakbita, O. and Maury, F. and Daoudi, L. and Lafont, M. C. and Amjoud, M. and Senocq, F. and Jada, A. and Aghzzaf, A. A.},
title = {Comprehensive physicochemical study of dioctahedral palygorskite-rich clay from Marrakech High Atlas (Morocco)},
journal = {Physics and Chemistry of Minerals},
year = {2013},
volume = {40},
number = {5},
pages = {411--424},
doi = {http://doi.org/10.1007/s00269-013-0579-3}
}
|
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| Rietsch, J.-C., Brender, P., Dentzer, J., Gadiou, R., Vidal, L. and Vix-Guterl, C. | Evidence of water chemisorption during graphite friction under moist conditions | 2013 | Carbon Vol. 55(0), pp. 90-97 |
article | URL |
| Abstract: The influence of water on the tribological properties of carbon materials is often explained by the lubricating properties of water. In this study, the interactions between water and the active sites created by the friction, and their influences on the friction coefficient and on the wear are analysed. In order to investigate the chemical reactions under a mechanical stress, experiments were performed under a controlled atmosphere in a planetary ball mill. The chemical reactions between water and graphite were examined by using isotopic labelled water, by doing a chemical balance of the gas phase in the jar and by analysing the surface of the milled material by temperature programmed desorption coupled with mass spectrometry. From the experimental results, a chemisorption mechanism could be proposed to explain how the graphite lubricating properties depend on water. Since the phenomena in the ball mill are similar to those observed with a classical pin-on-disc tribometer, the results obtained could therefore be extrapolated to the graphite behaviour in a conventional tribometer system. | |||||
BibTeX:
@article{Rietsch2013,
author = {Rietsch, Jean-Christophe and Brender, Patrice and Dentzer, Joseph and Gadiou, Roger and Vidal, Loic and Vix-Guterl, Cathie},
title = {Evidence of water chemisorption during graphite friction under moist conditions},
journal = {Carbon},
year = {2013},
volume = {55},
number = {0},
pages = {90--97},
url = {http://www.sciencedirect.com/science/article/pii/S0008622312009803}
}
|
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| Rodrigues, L.A., Parmentier, J., Parra, J.B. and Thim, G.P. | Preparation of nodular carbon cryogel from simple and inexpensive polycondensation reaction of commercial modified black wattle tannin | 2013 | Journal of Sol-gel Science and Technology Vol. 67(3), pp. 519-526 |
article | DOI |
| Abstract: Tannin-formaldehyde cryogels (TFC) were synthesized by sol-gel polycondensation of low molecular weight and highly reactive modified tannin with formaldehyde using HCl as a catalyst. Carbon cryogels (CC) were obtained by the TFC pyrolysis at an inert atmosphere at 800 A degrees C. Pyrolysis caused significant changes in the physical and chemical properties of the material. The pyrolysis induced the decomposition of acid superficial groups and the development of basic ones. Pyrolysis also provoked significant change in the pore volume, forming a great amount of micropores. TFC and CC showed amorphous and turbostratic structures, respectively. Unpurified samples had inorganic impurities in their compositions. | |||||
BibTeX:
@article{Rodrigues2013,
author = {Rodrigues, L. A. and Parmentier, J. and Parra, J. B. and Thim, G. P.},
title = {Preparation of nodular carbon cryogel from simple and inexpensive polycondensation reaction of commercial modified black wattle tannin},
journal = {Journal of Sol-gel Science and Technology},
year = {2013},
volume = {67},
number = {3},
pages = {519--526},
doi = {http://doi.org/10.1007/s10971-013-3109-3}
}
|
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| Rosenthal, M., Li, L., Hernandez, J.J., Zhu, X.M., Ivanov, D.A. and Moller, M. | A Diacetylene-Containing Wedge-Shaped Compound: Synthesis, Morphology, and Photopolymerization | 2013 | Chemistry-a European Journal Vol. 19(13), pp. 4300-4307 |
article | DOI |
| Abstract: A novel wedge-shaped compound containing two diacetylene tails, namely, methyl 3,5-bis(trideca-2,4-diyn-1yloxyl) benzoate (DDABM), was synthesized. As shown by UV/Vis spectroscopy this compound can be polymerized under UV irradiation. The crystalline structure of DDABM was investigated by grazing-incidence wide-angle X-ray diffraction on oriented crystal-line films deposited on PTFE-rubbed silicon wafer substrates. Furthermore, the spherulites formed in thicker films were analyzed by wide-angle X-ray diffraction. A molecular packing model of DDABM based on the X-ray diffraction data is proposed. The diacetylene units are oriented along a defined lattice direction with a reticular distance of 4.85 angstrom, which fulfills the requirements for topochemical polymerization. It was observed that UV polymerization does not affect the phase behavior of the compound, but mainly alters its optical properties. | |||||
BibTeX:
@article{Rosenthal2013,
author = {Rosenthal, M. and Li, L. and Hernandez, J. J. and Zhu, X. M. and Ivanov, D. A. and Moller, M.},
title = {A Diacetylene-Containing Wedge-Shaped Compound: Synthesis, Morphology, and Photopolymerization},
journal = {Chemistry-a European Journal},
year = {2013},
volume = {19},
number = {13},
pages = {4300--4307},
doi = {http://doi.org/10.1002/chem.201203240}
}
|
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| Rosenthal, M., Hernandez, J., Odarchenko, Y., Soccio, M., Lotti, N., Cola, E., Burghammer, M. and Ivanov, D. | Non-radial growth of helical homopolymer crystals: Breaking the paradigm of the polymer spherulite microstructure | 2013 | - Vol. 34(23-24)Macromolecular Rapid Communications, pp. 1815-1819 |
article | URL |
| Abstract: Radial symmetry is essential for the conventional view of the polymer spherulite microstructure. Typically it is assumed that, in the course of the spherulite morphogenesis, the lamellar crystals grow radially. Using submicron X-ray diffraction, it is shown that in banded spherulites of poly(propylene adipate) the crystals have the shape of a helix with fl at-on crystals winding around a virtual cylinder of about 6 μm in diameter. The helix angle of 30 °?implies that the crystal growth direction is tilted away from the spherulite radius by this angle. The implications of the helical crystal shape contradict the paradigm of the spherulitic microstructure. The radial growth rate of such spherulites does not correspond to the crystal growth rate, but to the propagation rate of the virtual cylinder the ribbons wind around. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | |||||
BibTeX:
@article{Rosenthal2013b,
author = {Rosenthal, M. and Hernandez, J.J. and Odarchenko, Y.I. and Soccio, M. and Lotti, N. and Cola, E.D. and Burghammer, M. and Ivanov, D.A.},
title = {Non-radial growth of helical homopolymer crystals: Breaking the paradigm of the polymer spherulite microstructure},
booktitle = {Macromolecular Rapid Communications},
journal = {-},
year = {2013},
volume = {34},
number = {23-24},
pages = {1815--1819},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894310610&doi=10.1002%2fmarc.201300713&partnerID=40&md5=c75a6bace263cfb0fc2df713aaaaa2fd}
}
|
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| Santa, C.F., Jaber, M., Guth, J.L. and Sierra, L. | Synthesis of texturally biphasic mesoporous carbon/silica composites and carbons | 2013 | Microporous and Mesoporous Materials Vol. 173, pp. 53-63 |
article | URL |
| Abstract: We report a new synthesis of texturally biphasic carbon/silica composites and carbons that exhibit high surface areas (up to 1500m2g-1), pore volumes (up to 1.9 cm3g-1) and mesopores (4.6-6.9 nm). The composite materials have ordered mesoporous carbon domains embedded in a disordered mesoporous composite carbon/silica phase. This biphasic texture is preserved for the carbons obtained after silica etching. The synthesis involves the addition of tetraethoxysilane (TEOS) into an alkaline triblock copolymer (PEO140PPO39PEO140) aqueous solution, followed by addition of phenol and formaldehyde. The resol/silica composites, obtained after several days under stirring and heating, are pyrolyzed at 500°C or 800°C. TEOS and resin monomers effects on the copolymer self-assembly to form micelles and vesicles were studied by dynamic light scattering (DLS) before flocculation. We propose a formation mechanism, where siliceous species, are localized mainly in micelles outside the vesicles and in the vesicles bilayers, modifying their properties. The hydrophilic resol monomers are absorbed by micelles outside the vesicles as well as by those inside the vesicles core. After flocculation, biphasic materials, with a resol containing phase embedded in a resol-silica composite phase, are obtained. The in situ formation of silica reduces the mesopores shrinking occasioned by pyrolysis in both the hybrid carbon/silica and carbon domains although causes disorder in the pores of the hybrid domain. | |||||
BibTeX:
@article{Santa2013,
author = {Santa, Cristiam F. and Jaber, Maguy and Guth, Jean L. and Sierra, Ligia},
title = {Synthesis of texturally biphasic mesoporous carbon/silica composites and carbons},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {173},
pages = {53-63},
url = {http://www.sciencedirect.com/science/article/pii/S1387181113000632}
}
|
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| Shokri, R., Lacour, M.-A., Jarrosson, T., Lère-Porte, J.-P., Serein-Spirau, F., Miqueu, K., Sotiropoulos, J.-M., Vonau, F., Aubel, D., Cranney, M., Reiter, G. and Simon, L. | Generating Long Supramolecular Pathways with a Continuous Density of States by Physically Linking Conjugated Molecules via Their End Groups | 2013 | J. Am. Chem. Soc. Vol. 135(15)Journal of the American Chemical Society, pp. 5693-5698 |
article | DOI URL |
| Abstract: Self-assembly of conjugated 2,5-dialkoxy-phenylene-thienylene-based oligomers on epitaxial monolayer graphene was studied in ultrahigh vacuum by low-temperature scanning tunneling microscopy (STM). The formation of long one-dimensional (1D) supramolecular chain-like structures has been observed, associated to a physical linking of their ends which involved the rotation of the end thiophene rings in order to allow π?π stacking of these end-groups. dI/dV maps taken at an energy corresponding to the excited states showed a continuous electronic density of states, which tentatively suggests that within such molecular chains conjugation of electrons is preserved even across physically linked molecules. Thus, in a self-organization process conjugation may be extended by appropriately adapting conformations of neighboring molecules. Our STM results on such self-organized end-linked molecules potentially represent a direct visualization of J-aggregates. Self-assembly of conjugated 2,5-dialkoxy-phenylene-thienylene-based oligomers on epitaxial monolayer graphene was studied in ultrahigh vacuum by low-temperature scanning tunneling microscopy (STM). The formation of long one-dimensional (1D) supramolecular chain-like structures has been observed, associated to a physical linking of their ends which involved the rotation of the end thiophene rings in order to allow π?π stacking of these end-groups. dI/dV maps taken at an energy corresponding to the excited states showed a continuous electronic density of states, which tentatively suggests that within such molecular chains conjugation of electrons is preserved even across physically linked molecules. Thus, in a self-organization process conjugation may be extended by appropriately adapting conformations of neighboring molecules. Our STM results on such self-organized end-linked molecules potentially represent a direct visualization of J-aggregates. | |||||
BibTeX:
@article{Shokri2013,
author = {Shokri, Roozbeh and Lacour, Marie-Agnés and Jarrosson, Thibaut and Lère-Porte, Jean-Pierre and Serein-Spirau, Françoise and Miqueu, Karinne and Sotiropoulos, Jean-Marc and Vonau, François and Aubel, Dominique and Cranney, Marion and Reiter, Günter and Simon, Laurent},
title = {Generating Long Supramolecular Pathways with a Continuous Density of States by Physically Linking Conjugated Molecules via Their End Groups},
booktitle = {Journal of the American Chemical Society},
journal = {J. Am. Chem. Soc.},
publisher = {American Chemical Society},
year = {2013},
volume = {135},
number = {15},
pages = {5693--5698},
url = {http://dx.doi.org/10.1021/ja311964b},
doi = {http://doi.org/10.1021/ja311964b}
}
|
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| Spangenberg, A., Métivier, R., Yasukuni, R., Shibata, K., Brosseau, A., Grand, J., Aubard, J., Yu, P., Asahi, T. and Nakatani, K. | Photoswitchable interactions between photochromic organic diarylethene and surface plasmon resonance of gold nanoparticles in hybrid thin films | 2013 | Vol. 15(24)Physical Chemistry Chemical Physics, pp. 9670-9678 |
article | URL |
| Abstract: Hybrid materials combining gold nanoparticles (GNP) of variable diameter and an organic thin layer of photochromic diarylethenes were achieved. Solid-state photoswitching based on ring-closure/ring-opening reaction was carried out under alternate UV and visible irradiations. In addition to the spectral changes due to the photochromism itself, the surface plasmon resonance related to the GNP is significantly modified, influenced by a photoinduced change in the refractive index of its environment. These two contributions were sorted out, showing the possibility of probing a photochromic switch by following the plasmon band. The shape change of the plasmon band was consistently compared to calculations based on the Mie theory. Additionally, with one given diarylethene compound, both UV-visible spectroscopy and surface enhanced Raman scattering (SERS) spectroscopy showed an acceleration of the ring-opening photochromic reaction in the presence of GNP. © 2013 the Owner Societies. | |||||
BibTeX:
@article{Spangenberg2013,
author = {Spangenberg, A. and Métivier, R. and Yasukuni, R. and Shibata, K. and Brosseau, A. and Grand, J. and Aubard, J. and Yu, P. and Asahi, T. and Nakatani, K.},
title = {Photoswitchable interactions between photochromic organic diarylethene and surface plasmon resonance of gold nanoparticles in hybrid thin films},
booktitle = {Physical Chemistry Chemical Physics},
year = {2013},
volume = {15},
number = {24},
pages = {9670--9678},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878677795&doi=10.1039%2fc3cp50770j&partnerID=40&md5=9b4e1b79f81f174b095eeb23b1b6e635}
}
|
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| Spina, S., Zhou, X., Segovia, C., Pizzi, A., Romagnoli, M., Giovando, S., Pasch, H., Rode, K. and Delmotte, L. | Phenolic resin adhesives based on chestnut (Castanea sativa) hydrolysable tannins | 2013 | Journal of Adhesion Science and Technology Vol. 27(18-19), pp. 2103-2111 |
article | DOI |
| Abstract: Chestnut hydrolysable tannins are phenolic materials that have been considered too unreactive to compete in the phenolic resin adhesives market for exterior boards for the building industry. However, an article in 1973 describing 3years industrial application of chestnut hydrolysable tannins during the first oil crisis indicated that this was not the case. We have extended this old work by using superior phenolic resins formulations and producing phenol-formaldehyde-chestnut tannin adhesives where a substitution of up to 80% of the phenol is possible with remarkably good results. The reactions involved were clarified by C-13 NMR and MALDI-TOF mass spectrometry. | |||||
BibTeX:
@article{Spina2013,
author = {Spina, S. and Zhou, X. and Segovia, C. and Pizzi, A. and Romagnoli, M. and Giovando, S. and Pasch, H. and Rode, K. and Delmotte, L.},
title = {Phenolic resin adhesives based on chestnut (Castanea sativa) hydrolysable tannins},
journal = {Journal of Adhesion Science and Technology},
year = {2013},
volume = {27},
number = {18-19},
pages = {2103-2111},
note = {Special Issue: Biobased Adhesives},
doi = {http://doi.org/10.1080/01694243.2012.697673}
}
|
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| Spina, S., Zhou, X., Segovia, C., Pizzi, A., Romagnoli, M., Giovando, S., Pasch, H., Rode, K. and Delmotte, L. | Phenolic resin wood panel adhesives based on chestnut (Castanea sativa) hydrolysable tannins | 2013 | International Wood Products Journal Vol. 4(2), pp. 95-100 |
article | DOI URL |
| Abstract: Chestnut hydrolysable tannins are phenolic materials that have been considered too unreactive to compete in the phenolic resin adhesives market for exterior boards for the building industry. However, an article in 1973 describing 3 years of industrial application of chestnut hydrolysable tannins during the first oil crisis indicated that this was not the case. This previous work has been extended by using superior phenolic resins formulations and producing phenol‐formaldehyde‐chestnut tannin adhesives where a substitution of up to 80% of the phenol is possible with remarkably good results. The reactions involved were clarified by 13C NMR and MALDI‐TOF mass spectrometry. | |||||
BibTeX:
@article{Spina2013-05-01T00:00:00,
author = {Spina, S and Zhou, X and Segovia, C and Pizzi, A and Romagnoli, M and Giovando, S and Pasch, H and Rode, K and Delmotte, L},
title = {Phenolic resin wood panel adhesives based on chestnut (Castanea sativa) hydrolysable tannins},
journal = {International Wood Products Journal},
year = {2013},
volume = {4},
number = {2},
pages = {95-100},
url = {http://www.ingentaconnect.com/content/maney/iwp/2013/00000004/00000002/art00006},
doi = {http://doi.org/10.1179/2042645312Y.0000000020}
}
|
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| Stehlin, F., Diot, F., Gwiazda, A., Dirani, A., Salaun, M., Zelsmann, M. and Soppera, O. | Local Reorganization of Diblock Copolymer Domains in Directed Self-Assembly Monitored by in Situ High-Temperature AFM. [BibTeX] |
2013 | Langmuir : the ACS journal of surfaces and colloids Vol. 29(41), pp. 12796-803 |
article | DOI |
BibTeX:
@article{Stehlin2013,
author = {Stehlin, Fabrice and Diot, Frederic and Gwiazda, Agnieszka and Dirani, Ali and Salaun, Mathieu and Zelsmann, Marc and Soppera, Olivier},
title = {Local Reorganization of Diblock Copolymer Domains in Directed Self-Assembly Monitored by in Situ High-Temperature AFM.},
journal = {Langmuir : the ACS journal of surfaces and colloids},
year = {2013},
volume = {29},
number = {41},
pages = {12796--803},
doi = {http://doi.org/10.1021/la402935v}
}
|
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| Streltsov, D.R., Buzin, A.I., Dmitryakov, P.V., Bessonova, N.P., Kamasa, P., Ivanov, D.A. and Chvalun, S.N. | A study of p-xylylene polymerization kinetics by isoconversional analysis | 2013 | Thermochimica Acta Vol. 573, pp. 175-180 |
article | DOI |
| Abstract: The polymerization kinetics of p-xylylene in condensed state was studied by non-isothermal DSC measurements conducted at different heating rates. The total exothermal effect of polymerization reaction (Q=86 +/- 3 kJ mol(-1)) is found to be almost independent from the heating rate. The polymerization temperature spans from -115 degrees C to -80 degrees C at a heating rate of 1 degrees C min(-1) and from 85 degrees C to 30 degrees C at a heating rate of 200 degrees C min(-1). The integral isoconversional method by Vyazovkin and differential isoconversional method by Friedman were applied for the kinetics analysis. Two polymerization regimes have been identified, depending on the heating rate. The effective activation energy exhibits variation with the degree of conversion: it varies from 40 to 65 kJ mol(-1) at low heating rates (1-10 degrees C min(-1)) and from 40 to 24 kJ mol(-1) at high heating rates (20-200 degrees C min(-1)). We suggest that at the low heating rates the polymerization proceeds in the solid state, whereas at the high heating rates it occurs in the liquid state. Atomic force microscopy measurements reveal the effect of polymerization conditions on the surface morphology of the resulting poly(p-xylylene) films. (C) 2013 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Streltsov2013,
author = {Streltsov, D. R. and Buzin, A. I. and Dmitryakov, P. V. and Bessonova, N. P. and Kamasa, P. and Ivanov, D. A. and Chvalun, S. N.},
title = {A study of p-xylylene polymerization kinetics by isoconversional analysis},
journal = {Thermochimica Acta},
year = {2013},
volume = {573},
pages = {175--180},
doi = {http://doi.org/10.1016/j.tca.2013.09.008}
}
|
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| Tawbi, K., Simon-Masseron, A. and Patarin, J. | Synthesis of microporous gallophosphates obtained by in situ decomposition of hexamethylphosphoramide | 2013 | Microporous and Mesoporous Materials Vol. 169(0), pp. 192-200 |
article | URL |
| Abstract: This work focuses on the development of a new synthesis route of reducing the number of reactants for the synthesis of phosphate-based materials. Thus one compound, the hexamethylphosphoramide, plays the roles of both precursor of the structure-directing agent (SDA) and the phosphorus source. The influence of some synthesis parameters (heating temperature, nature of solvent, acidity of the medium...) on the in situ decomposition of hexamethylphosphoramide and the results obtained for the gallophosphate system are reported. | |||||
BibTeX:
@article{Tawbi2013,
author = {Tawbi, Khouloud and Simon-Masseron, Angélique and Patarin, Joël},
title = {Synthesis of microporous gallophosphates obtained by in situ decomposition of hexamethylphosphoramide},
journal = {Microporous and Mesoporous Materials},
year = {2013},
volume = {169},
number = {0},
pages = {192--200},
url = {http://www.sciencedirect.com/science/article/pii/S138718111200666X}
}
|
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| Tehfe, M.-A., Zein-Fakih, A., Lalevee, J., Dumur, F., Gigmes, D., Graff, B., Morlet-Savary, F., Hamieh, T. and Fouassier, J.-P. | New pyridinium salts as versatile compounds for dye sensitized photopolymerization | 2013 | European Polymer Journal Vol. 49(0), pp. 567-574 |
article | URL |
| Abstract: A series of pyridinium salts were synthesized and investigated as new dyes for photoinitiating systems of polymerization. They exhibit a strong absorption at about 550 nm well matching with the visible light emission of different convenient visible light sources. Interestingly, very soft irradiation (halogen lamp) as well as laser diode exposure (457 and 532 nm) can be used. When employed in the presence of a silane and an iodonium salt, they efficiently initiate the free radical polymerization of acrylates and free radical promoted cationic polymerization of epoxides. An acrylate/epoxide blend is also easily polymerized i.e. for the synthesis of interpenetrating polymer networks. In combination with amine, the proposed dyes can also initiate free radical polymerizations. The mechanisms analyzed by ESR and photolysis experiments are discussed for the different multi-component initiating systems. | |||||
BibTeX:
@article{Tehfe,
author = {Tehfe, Mohamad-Ali and Zein-Fakih, Abbas and Lalevee, Jacques and Dumur, Frédéric and Gigmes, Didier and Graff, Bernadette and Morlet-Savary, Fabrice and Hamieh, Tayssir and Fouassier, Jean-Pierre},
title = {New pyridinium salts as versatile compounds for dye sensitized photopolymerization},
journal = {European Polymer Journal},
year = {2013},
volume = {49},
number = {0},
pages = {567-574},
url = {http://www.sciencedirect.com/science/article/pii/S001430571200331X}
}
|
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| Tehfe, M.-A., Dumur, F., Contal, E., Graff, B., Morlet-Savary, F., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | New insights into radical and cationic polymerizations upon visible light exposure: role of novel photoinitiator systems based on the pyrene chromophore | 2013 | Polym. Chem. Vol. 4, pp. 1625-1634 |
article | URL |
| Abstract: New aromatic derivatives PyD based on a pyrene moiety are proposed here as new photoinitiators (PIs) in multi-component systems (with an iodonium salt, a sulfonium salt and optionally a silane) for the radical polymerization of acrylates and the cationic polymerization of epoxy, epoxy-silicone and vinyl ethers. These new photoinitiators allow the use of a long wavelength excitation (using visible light delivered by a halogen lamp, a laser diode at 457 nm or a Xe-Hg lamp). Excellent polymerization profiles are obtained. For polymerization processes using pyrene, very low conversions are reached in agreement with the lack of absorption of this compound for [small lambda] > 380 nm i.e. PyDs are attractive compounds for visible light. Acrylate-epoxide, acrylate-vinyl ether and vinyl ether-epoxide blends are also easily polymerized i.e. for the synthesis of interpenetrating or crosslinked polymer networks. The initiation step mechanisms analyzed by ESR, fluorescence, steady state photolysis and laser flash photolysis experiments are discussed. | |||||
BibTeX:
@article{Tehfe2013,
author = {Tehfe, Mohamad-Ali and Dumur, Frederic and Contal, Emmanuel and Graff, Bernadette and Morlet-Savary, Fabrice and Gigmes, Didier and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {New insights into radical and cationic polymerizations upon visible light exposure: role of novel photoinitiator systems based on the pyrene chromophore},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
pages = {1625-1634},
url = {http://dx.doi.org/10.1039/C2PY20950K}
}
|
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| Tehfe, M.-A., Dumur, F., Graff, B., Clément, J.-L., Gigmes, D., Morlet-Savary, F., Fouassier, J.-P. and Lalevee, J. | New Cleavable Photoinitiator Architecture with Huge Molar Extinction Coefficients for Polymerization in the 340-450 nm Range. | 2013 | Macromolecules Vol. 46(3)Macromolecules, pp. 736-746 |
article | DOI URL |
| Abstract: A new Type I photoinitiator Tr_DMPA is described. It consists in three 2,2?-dimethoxy 2-phenyl acetophenone (DMPA) units grafted onto a truxene (Tr) scaffold. Compared to DMPA itself, the lowest electronic transition exhibits a ππ* character and the corresponding molar extinction coefficients ε are increased from about 400 M?1 cm?1 (at about 332 nm for DMPA) to 63?000 M?1 cm?1 (at 338 nm for Tr_DMPA); such huge values are exceptional in Type I photoinitiators at this wavelength. Tr_DMPA undergoes a fast cleavage and efficiently initiate an acrylate polymerization upon a Xe?Hg lamp, a halogen lamp or a laser diode exposure at 405 nm (upon very low light intensities: 2?12 mW/cm2) in the 300?450 nm range. The polymerization of epoxides or divinylethers is also feasible in the presence of an iodonium salt at 405 nm where reference photoinitiators cannot efficiently operate. The chemical mechanisms analyzed by ESR, fluorescence, steady state photolysis, and laser flash photolysis experiments are discussed. A new Type I photoinitiator Tr_DMPA is described. It consists in three 2,2?-dimethoxy 2-phenyl acetophenone (DMPA) units grafted onto a truxene (Tr) scaffold. Compared to DMPA itself, the lowest electronic transition exhibits a ππ* character and the corresponding molar extinction coefficients ε are increased from about 400 M?1 cm?1 (at about 332 nm for DMPA) to 63?000 M?1 cm?1 (at 338 nm for Tr_DMPA); such huge values are exceptional in Type I photoinitiators at this wavelength. Tr_DMPA undergoes a fast cleavage and efficiently initiate an acrylate polymerization upon a Xe?Hg lamp, a halogen lamp or a laser diode exposure at 405 nm (upon very low light intensities: 2?12 mW/cm2) in the 300?450 nm range. The polymerization of epoxides or divinylethers is also feasible in the presence of an iodonium salt at 405 nm where reference photoinitiators cannot efficiently operate. The chemical mechanisms analyzed by ESR, fluorescence, steady state photolysis, and laser flash photolysis experiments are discussed. | |||||
BibTeX:
@article{Tehfe2013a,
author = {Tehfe, Mohamad-Ali and Dumur, Frédéric and Graff, Bernadette and Clément, Jean-Louis and Gigmes, Didier and Morlet-Savary, Fabrice and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {New Cleavable Photoinitiator Architecture with Huge Molar Extinction Coefficients for Polymerization in the 340-450 nm Range.},
booktitle = {Macromolecules},
journal = {Macromolecules},
publisher = {American Chemical Society},
year = {2013},
volume = {46},
number = {3},
pages = {736--746},
url = {http://dx.doi.org/10.1021/ma3024359},
doi = {http://doi.org/10.1021/ma3024359}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Graff, B., Morlet-Savary, F., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | Design of new Type I and Type II photoinitiators possessing highly coupled pyrene-ketone moieties | 2013 | Polym. Chem. Vol. 4(7), pp. 2313-2324 |
article | URL |
| Abstract: New Type I and Type II photoinitiators based on 2,2-dimethoxy-2-phenylacetophenone (DMPA), benzophenone (BP) and thioxanthone (TX) linked to a pyrene (Py) moiety (Py_DMPA, Py_BP, Py_TX) are proposed here for the free radical polymerization of acrylates and the cationic polymerization of epoxides and vinylethers under a Xe-Hg lamp, laser diode at 405 nm or a halogen lamp. Excellent polymerization profiles using Py_DMPA and Py_BP are obtained, i.e. better than those recorded with the reference compounds (DMPA and BP). Specifically, Py_DMPA and Py_BP absorb in the near UV-visible range (360-420 nm range; absorption red-shift [similar]15 nm), exhibit huge ? values (up to a 90 fold increase) and high photochemical reactivity. The mechanisms analyzed by electron spin resonance, steady state photolysis, fluorescence and laser flash photolysis experiments are discussed for the different initiating systems. | |||||
BibTeX:
@article{Tehfe2013b,
author = {Tehfe, Mohamad-Ali and Dumur, Frederic and Graff, Bernadette and Morlet-Savary, Fabrice and Gigmes, Didier and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {Design of new Type I and Type II photoinitiators possessing highly coupled pyrene-ketone moieties},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
number = {7},
pages = {2313--2324},
url = {http://dx.doi.org/10.1039/C3PY21079K}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Telitel, S., Gigmes, D., Contal, E., Bertin, D., Morlet-Savary, F., Graff, B., Fouassier, J.-P. and Lalevee, J. | Zinc-based metal complexes as new photocatalysts in polymerization initiating systems | 2013 | European Polymer Journal Vol. 49(5), pp. 1040-1049 |
article | URL |
| Abstract: Zinc-based metal complexes (ZnC) are proposed as original photoinitiators in multi-component systems for the formation of free radicals under visible light irradiation. The ZnC/iodonium salt/additive three-component systems (where the additive can be a silane or a divinyl ether) present an excellent ability to promote either the free radical polymerization of an acrylate, the cationic polymerization of a divinyl ether and the polymerization of acrylate/vinyl ether blends under very soft irradiations (e.g. halogen lamp irradiation) or laser diodes (457 or 532 nm) exposure. The mechanisms are investigated by photolysis, luminescence and ESR experiments. | |||||
BibTeX:
@article{Tehfe2013c,
author = {Tehfe, Mohamad-Ali and Dumur, Frédéric and Telitel, Sofia and Gigmes, Didier and Contal, Emmanuel and Bertin, Denis and Morlet-Savary, Fabrice and Graff, Bernadette and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {Zinc-based metal complexes as new photocatalysts in polymerization initiating systems},
journal = {European Polymer Journal},
year = {2013},
volume = {49},
number = {5},
pages = {1040-1049},
url = {http://www.sciencedirect.com/science/article/pii/S0014305713000414}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Graff, B., Morlet-Savary, F., Fouassier, J.-P., Gigmes, D. and Lalevee, J. | New Push-Pull Dyes Derived from Michler’s Ketone For Polymerization Reactions Upon Visible Lights. | 2013 | Macromolecules Vol. 46(10)Macromolecules, pp. 3761-3770 |
article | DOI URL |
| Abstract: Among other photoinitiating systems, aromatic ketone based compounds have been largely exploited as photoinitiators (PIs). However, none of these compounds efficiently absorb above 420 nm. The search of novel architectures of PIs for getting an important red-shift of the absorption is crucial for the use of visible lights for polymer synthesis. Novel bifunctional dyes derived from the Michler?s ketone structure are proposed here as photoinitiators for the free radical polymerization of acrylates and the cationic polymerization of epoxides upon exposure to 457, 473, and 532 nm laser diodes and even to a green LED bulb at 514 nm. Excellent polymerization profiles are obtained. These original dyes exhibit a push?pull molecular character for a remarkable covering of the visible lights. The formation of the radicals and the ions in the two- and three-component photoinitiating systems is described and the initiation steps are discussed. Among other photoinitiating systems, aromatic ketone based compounds have been largely exploited as photoinitiators (PIs). However, none of these compounds efficiently absorb above 420 nm. The search of novel architectures of PIs for getting an important red-shift of the absorption is crucial for the use of visible lights for polymer synthesis. Novel bifunctional dyes derived from the Michler?s ketone structure are proposed here as photoinitiators for the free radical polymerization of acrylates and the cationic polymerization of epoxides upon exposure to 457, 473, and 532 nm laser diodes and even to a green LED bulb at 514 nm. Excellent polymerization profiles are obtained. These original dyes exhibit a push?pull molecular character for a remarkable covering of the visible lights. The formation of the radicals and the ions in the two- and three-component photoinitiating systems is described and the initiation steps are discussed. | |||||
BibTeX:
@article{Tehfe2013d,
author = {Tehfe, Mohamad-Ali and Dumur, Frédéric and Graff, Bernadette and Morlet-Savary, Fabrice and Fouassier, Jean-Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {New Push-Pull Dyes Derived from Michler’s Ketone For Polymerization Reactions Upon Visible Lights.},
booktitle = {Macromolecules},
journal = {Macromolecules},
publisher = {American Chemical Society},
year = {2013},
volume = {46},
number = {10},
pages = {3761--3770},
url = {http://dx.doi.org/10.1021/ma400766z},
doi = {http://doi.org/10.1021/ma400766z}
}
|
|||||
| Tehfe, M., Dumur, F., Graff, B., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Green-light-induced cationic ring-opening polymerization reactions : perylene-3,4 : 9,10 bis (Dicarboximide) as efficient photosensitizers | 2013 | Macrom. Chem. Physic Vol. 214, pp. 1052-1060 |
article | |
| Abstract: New perylene-3,4:9,10-bis(dicarboximide) (PBI) photoinitiators/photosensitizers derived from perylene-3,4:9,10-tetracarboxylic dianhydride are synthesized and investigated for the formation of free radicals under air and under very soft irradiation (i.e., halogen lamp) or laser diode exposure at 532 nm. Such a PBI in combination with a diphenyl iodonium salt and N-vinylcarbazole or a silane very efficiently promotes the ring-opening polymerization of epoxides and can also generate acrylate/epoxide interpenetrated polymer networks. It partly behaves as a metal-free organic photocatalyst operating in an oxidative catalytic cycle. The different chemical intermediates are characterized by ESR and laser flash photolysis experiments. The mechanisms involved in the initiation step are discussed. | |||||
BibTeX:
@article{Tehfe2013e,
author = {Tehfe, M.; and Dumur, F. and Graff, B. and Gigmes, D. and Fouassier J.P. and Lalevee, J},
title = {Green-light-induced cationic ring-opening polymerization reactions : perylene-3,4 : 9,10 bis (Dicarboximide) as efficient photosensitizers},
journal = {Macrom. Chem. Physic},
year = {2013},
volume = {214},
pages = {1052-1060}
}
|
|||||
| Tehfe, M.A., Louradour, F., Lalevee, J. and Fouassier, J.-P. | Photopolymerization Reactions: On the Way to a Green and Sustainable Chemistry [BibTeX] |
2013 | Applied Sciences Vol. 3(2), pp. 490-514 |
article | DOI URL |
BibTeX:
@article{Tehfe2013f,
author = {Tehfe, Mohamad Ali and Louradour, Fanny and Lalevee, Jacques and Fouassier, Jean-Pierre},
title = {Photopolymerization Reactions: On the Way to a Green and Sustainable Chemistry},
journal = {Applied Sciences},
year = {2013},
volume = {3},
number = {2},
pages = {490--514},
url = {http://www.mdpi.com/2076-3417/3/2/490},
doi = {http://doi.org/10.3390/app3020490}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Graff, B., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | Blue-to-Red Light Sensitive Push-Pull Structured Photoinitiators: Indanedione Derivatives for Radical and Cationic Photopolymerization Reactions | 2013 | Macromolecules Vol. 46(9)Macromolecules, pp. 3332-3341 |
article | DOI URL |
| Abstract: The actual photonitiators PI can only operate in a restricted part of the visible spectrum; as a consequence, several PIs are usually necessary to harvest all the emitted visible photons. In the present paper, new dyes based on a donor?π-acceptor structure (1,3-indanedione derivatives) are incorporated into visible light sensitive photoinitiating systems of polymerization. They exhibit an unusual and remarkable broad absorption lying from the blue to the red. When employed in the presence of an iodonium salt (Iod) and optionally N-vinylcarbazole (NVK), these dyes can efficiently initiate the radical photopolymerization of acrylates, the cationic photopolymerization of epoxide and vinylether monomers and the hybrid cure of acrylate/epoxide blends under exposure, e.g., at 405, 457, 473, 532, and 635 nm. They partly behave as organic photocatalysts. These particular light absorption properties and the initiation step mechanisms are investigated in detail. The actual photonitiators PI can only operate in a restricted part of the visible spectrum; as a consequence, several PIs are usually necessary to harvest all the emitted visible photons. In the present paper, new dyes based on a donor?π-acceptor structure (1,3-indanedione derivatives) are incorporated into visible light sensitive photoinitiating systems of polymerization. They exhibit an unusual and remarkable broad absorption lying from the blue to the red. When employed in the presence of an iodonium salt (Iod) and optionally N-vinylcarbazole (NVK), these dyes can efficiently initiate the radical photopolymerization of acrylates, the cationic photopolymerization of epoxide and vinylether monomers and the hybrid cure of acrylate/epoxide blends under exposure, e.g., at 405, 457, 473, 532, and 635 nm. They partly behave as organic photocatalysts. These particular light absorption properties and the initiation step mechanisms are investigated in detail. | |||||
BibTeX:
@article{Tehfe2013g,
author = {Tehfe, Mohamad-Ali and Dumur, Frédéric and Graff, Bernadette and Gigmes, Didier and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {Blue-to-Red Light Sensitive Push-Pull Structured Photoinitiators: Indanedione Derivatives for Radical and Cationic Photopolymerization Reactions},
booktitle = {Macromolecules},
journal = {Macromolecules},
publisher = {American Chemical Society},
year = {2013},
volume = {46},
number = {9},
pages = {3332--3341},
url = {http://dx.doi.org/10.1021/ma4005082},
doi = {http://doi.org/10.1021/ma4005082}
}
|
|||||
| Tehfe, M., Dumur, F., Contal, E., Graff, B., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Novel Highly Efficient Organophotocatalysts: Truxene-Acridine-1,8-diones as Photoinitiators of Polymerization | 2013 | Macromol. Chem. Phys. Vol. 214(19), pp. 2189-2201 |
article | URL |
| Abstract: Truxene-acridine-1,8-dione derivatives (Tr_AD) are proposed as new photoinitiators of polymerization under very soft irradiation (by a household halogen lamp), as well as laser-diode exposure at 405 nm. They exhibit a strong absorption around 380 nm. The Tr_AD/diphenyl iodonium salt/9-vinylcarbazole combination is able to promote the ring-opening polymerization of an epoxide, whereas the Tr_AD/alkyl halide/amine system is very efficient in initiating the radical photopolymerization of an acrylate. Excellent polymerization profiles are obtained. Acrylate/epoxide blends are also easily polymerized. These Tr_ADs in the three-component systems behave as photocatalysts according to oxidative cycles. The mechanisms are discussed for the different multicomponent initiating systems. | |||||
BibTeX:
@article{Tehfe2013h,
author = {Tehfe, M. and Dumur,F. and Contal, E. and Graff, B. and Gigmes, D. and Fouassier J.P. and Lalevee, J},
title = {Novel Highly Efficient Organophotocatalysts: Truxene-Acridine-1,8-diones as Photoinitiators of Polymerization},
journal = {Macromol. Chem. Phys.},
year = {2013},
volume = {214},
number = {19},
pages = {2189--2201},
url = {http://dx.doi.org/10.1002/macp.201300362}
}
|
|||||
| Tehfe, M.-A., Mondal, S., Nechab, M., Dumur, F., Bertrand, M.P., Graff, B., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | New Thiols for Photoinitiator-Free Thiol-Acrylate Polymerization | 2013 | Macromol. Chem. Phys. Vol. 214(12), pp. 1302-1308 |
article | URL |
| Abstract: New thiols for efficient thiol-ene polymerization reactions are presented. They do not exhibit any unpleasant odor, are characterized by quite good light-absorption properties at λ > 300 nm, and generate thiyl radicals upon UV-light exposure. Due to these interesting properties and contrary to many previously reported methodologies, the present thiol-acrylate polymerizations can be efficiently carried out without the presence of any additional photoinitiator. The chemical mechanisms are investigated by steady-state photolysis and electron spion resonance (ESR) experiments. Important parameters can also be extracted from molecular orbital calculations. | |||||
BibTeX:
@article{Tehfe2013i,
author = {Tehfe, Mohamad-Ali and Mondal, Shovan and Nechab, Malek and Dumur, Frédéric and Bertrand, Michèle P. and Graff, Bernadette and Gigmes, Didier and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {New Thiols for Photoinitiator-Free Thiol-Acrylate Polymerization},
journal = {Macromol. Chem. Phys.},
publisher = {WILEY-VCH Verlag},
year = {2013},
volume = {214},
number = {12},
pages = {1302--1308},
url = {http://dx.doi.org/10.1002/macp.201300077}
}
|
|||||
| Tehfe, M., Dumur, F., Graff, B., Morlet-Savary, F., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Push-pull (thio)barbituric acid derivatives in dye photosensitized radical and cationic polymerization reactions under 457/473 nm laser beams or blue LEDs | 2013 | Polym. Chem. Vol. 4(13), pp. 3866-3875 |
article | URL |
| Abstract: A series of new dyes based on (thio)barbituric acid derivatives were synthesized and used as photoinitiators of polymerization upon very soft irradiation (laser diodes at 457 nm and 473 nm; blue LED bulbs or even a halogen lamp). These dyes can work according to an oxidative cycle (dye/diphenyl iodonium salt/N-vinylcarbazole system) or a reductive cycle (dye/amine/alkyl halide system) and partly behave as organic photocatalysts. Ring-opening polymerization (ROP) of epoxides and radical polymerization (RP) of acrylates are easily promoted. Excellent RP and/or ROP polymerization profiles are obtained. The contrasting behavior of the thiobarbituric vs. barbituric acid derivative is discussed. The initiation mechanisms, analyzed by Electron Spin Resonance (ESR) and steady state photolysis experiments, are detailed. | |||||
BibTeX:
@article{Tehfe2013j,
author = {Tehfe, M. and Dumur, F. and Graff, B. and Morlet-Savary, F. and Gigmes, D. and Fouassier J.P. and Lalevee, J},
title = {Push-pull (thio)barbituric acid derivatives in dye photosensitized radical and cationic polymerization reactions under 457/473 nm laser beams or blue LEDs},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
number = {13},
pages = {3866--3875},
url = {http://dx.doi.org/10.1039/C3PY00372H}
}
|
|||||
| Tehfe, M., Dumur, F., Xiao, P., Graff, B., Morlet-Savary, F., Fouassier, J.P., Gigmes, D. and Lalevee, J. | New chromone based photoinitiators for polymerization reactions under visible light | 2013 | Polym. Chem. Vol. 4, pp. 4234-4244 |
article | DOI URL |
| Abstract: Novel photoinitiators derived from a chromone structure are proposed for the free radical polymerization of acrylates and the free radical promoted cationic polymerization of epoxides upon exposure to a 457 nm laser diode and even under soft irradiation conditions (blue LED bulb at 462 nm and halogen lamp). Good polymerization profiles are obtained. These original dyes exhibit a push-pull molecular character as revealed by MO calculations. The initiation mechanisms are analyzed through ESR, fluorescence and laser flash photolysis experiments. | |||||
BibTeX:
@article{Tehfe2013k,
author = {Tehfe, M. and Dumur, F. and Xiao, P. and Graff, B. And Morlet-Savary, F. and Fouassier J.P. and Gigmes, D. and Lalevee, J},
title = {New chromone based photoinitiators for polymerization reactions under visible light},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
pages = {4234-4244},
url = {http://dx.doi.org/10.1039/C3PY00536D},
doi = {http://doi.org/10.1039/C3PY00536D}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Vilà, N., Graff, B., Mayer, C.R., Fouassier, J.P., Gigmes, D. and Lalevee, J. | A Multicolor Photoinitiator for Cationic Polymerization and Interpenetrated Polymer Network Synthesis: 2,7-Di-tert-butyldimethyldihydropyrene | 2013 | Macromol. Rapid Commun. Vol. 34(13), pp. 1104-1109 |
article | URL |
| Abstract: For polymer synthesis upon visible light, actual photoinitiator operates in a restricted part of the spectrum. As a consequence, several photoinitiators are necessary to harvest all of the emitted visible photons. Herein, 2,7-di-tert-butyldimethyldihydropyrene is used for the first time as a multicolor photoinitiator for the cationic polymerization of epoxides. Upon addition of diphenyliodonium hexafluorophosphate and optionally N-vinylcarbazole, the originality of this approach is to allow efficient monomer conversions under various excitation light sources in the 360-650 nm wavelength range: halogen lamps, and light-emitting and laser diodes. The synthesis of an interpenetrated polymer network from an epoxide/acrylate blend using a red light at 635 nm is also feasible. The formed polymer material exhibits a photochromic character. | |||||
BibTeX:
@article{Tehfe2013l,
author = {Tehfe, Mohamad-Ali and Dumur, Frédéric and Vilà, Neus and Graff, Bernadette and Mayer, Cédric R. and Fouassier, Jean Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {A Multicolor Photoinitiator for Cationic Polymerization and Interpenetrated Polymer Network Synthesis: 2,7-Di-tert-butyldimethyldihydropyrene},
journal = {Macromol. Rapid Commun.},
publisher = {WILEY-VCH Verlag},
year = {2013},
volume = {34},
number = {13},
pages = {1104--1109},
url = {http://dx.doi.org/10.1002/marc.201300302}
}
|
|||||
| Tehfe, M.-A., Dumur, F., Contal, E., Graff, B., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | Novel highly efficient organophotocatalysts: Truxene-acridine-1,8-diones as photoinitiators of polymerization | 2013 | Vol. 214(19)Macromolecular Chemistry and Physics, pp. 2189-2201 |
article | URL |
| Abstract: Truxene-acridine-1,8-dione derivatives (Tr-AD) are proposed as new photoinitiators of polymerization under very soft irradiation (by a household halogen lamp), as well as laser-diode exposure at 405 nm. They exhibit a strong absorption around 380 nm. The Tr-AD/diphenyl iodonium salt/9-vinylcarbazole combination is able to promote the ring-opening polymerization of an epoxide, whereas the Tr-AD/alkyl halide/amine system is very efficient in initiating the radical photopolymerization of an acrylate. Excellent polymerization profiles are obtained. Acrylate/epoxide blends are also easily polymerized. These Tr-ADs in the three-component systems behave as photocatalysts according to oxidative cycles. The mechanisms are discussed for the different multicomponent initiating systems. Original compounds Tr AD based on acridine-dione (AD) linked to a truxene (Tr) moiety and usable as photocatalysts are proposed. The large molecular orbital coupling leads to improved ground-state absorptions and allows reactions under exposure to a halogen lamp. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | |||||
BibTeX:
@article{Tehfe2013y,
author = {Tehfe, M.-A. and Dumur, F. and Contal, E. and Graff, B. and Gigmes, D. and Fouassier, J.-P. and Lalevee, J.},
title = {Novel highly efficient organophotocatalysts: Truxene-acridine-1,8-diones as photoinitiators of polymerization},
booktitle = {Macromolecular Chemistry and Physics},
year = {2013},
volume = {214},
number = {19},
pages = {2189--2201},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885584263&doi=10.1002%2fmacp.201300362&partnerID=40&md5=d5f9f9f491820b437906329505362c41}
}
|
|||||
| Telitel, S., Schweizer, S., Morlet-Savary, F., Graff, B., Tschamber, T., Blanchard, N., Fouassier, J.P., Lelli, M., Lacote, E. and Lalevee, J. | Soft Photopolymerizations Initiated by Dye-Sensitized Formation of NHC-Boryl Radicals under Visible | 2013 | Macromolecules Vol. 46(1)Macromolecules, pp. 43-48 |
article | DOI URL |
| Abstract: A procedure for the production of N-heterocyclic carbene?boryl radicals (NHC-BH2?) upon visible light irradiation under soft conditions is presented. New acridine orange (dye)/diphenyl disulfide/NHC?BH3 and dye/sulfonium salt/NHC?BH3 three-component initiating systems are introduced for the efficient visible light photopolymerization of trimethylolpropane triacrylate. The new systems could be extendend to polymerization reactions in water (hydroxyethyl acrylate and hydroxyethyl methyl acrylate), which proceeded with strongly improved polydispersity. The chemical mechanisms are investigated through EPR and photolysis experiments. A procedure for the production of N-heterocyclic carbene?boryl radicals (NHC-BH2?) upon visible light irradiation under soft conditions is presented. New acridine orange (dye)/diphenyl disulfide/NHC?BH3 and dye/sulfonium salt/NHC?BH3 three-component initiating systems are introduced for the efficient visible light photopolymerization of trimethylolpropane triacrylate. The new systems could be extendend to polymerization reactions in water (hydroxyethyl acrylate and hydroxyethyl methyl acrylate), which proceeded with strongly improved polydispersity. The chemical mechanisms are investigated through EPR and photolysis experiments. | |||||
BibTeX:
@article{Telitel2012a,
author = {Telitel, Sofia and Schweizer, Stephane and Morlet-Savary, Fabrice and Graff, Bernadette and Tschamber, Theophile and Blanchard, Nicolas and Fouassier, Jean Pierre and Lelli, Moreno and Lacote, Emmanuel and Lalevee, Jacques.},
title = {Soft Photopolymerizations Initiated by Dye-Sensitized Formation of NHC-Boryl Radicals under Visible},
booktitle = {Macromolecules},
journal = {Macromolecules},
publisher = {American Chemical Society},
year = {2013},
volume = {46},
number = {1},
pages = {43--48},
url = {http://dx.doi.org/10.1021/ma302009p},
doi = {http://doi.org/10.1021/ma302009p}
}
|
|||||
| Telitel, S., Blanchard, N., Schweizer, S., Morlet-Savary, F., Graff, B., Fouassier, J.-P. and Lalevee, J. | BODIPY derivatives and boranil as new photoinitiating systems of cationic polymerization exhibiting a tunable absorption in the 400-600 nm spectral range | 2013 | Polymer Vol. 54(0), pp. 2071-2076 |
article | URL |
| Abstract: Novel photoinitiators based on the BODIPY and boranil chromophores being able to photosensitize the iodonium salt decomposition are proposed for the cationic polymerization of epoxy, epoxy-silicone and vinyl ether monomers under exposure to laser diodes at 405, 457, 473 and 532 nm. They allow an interesting tunability of the absorption in the 400-600 nm wavelength range. Quite excellent polymerization profiles are recorded with final conversions up to 90%. Addition of N-vinylcarbazole (NVK) can also greatly enhance the performance. ESR and steady state photolysis experiments show the generation of aryl radicals and cation radicals. The observed mechanisms are discussed. | |||||
BibTeX:
@article{Telitel2013,
author = {Telitel, Sofia and Blanchard, Nicolas and Schweizer, Stéphane and Morlet-Savary, Fabrice and Graff, Bernadette and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {BODIPY derivatives and boranil as new photoinitiating systems of cationic polymerization exhibiting a tunable absorption in the 400-600 nm spectral range},
journal = {Polymer},
year = {2013},
volume = {54},
number = {0},
pages = {2071-2076},
url = {http://www.sciencedirect.com/science/article/pii/S0032386113001341}
}
|
|||||
| Telitel, S., Dumur, F., Gigmes, D., Graff, B., Fouassier, J.P. and Lalevee, J. | New functionalized aromatic ketones as photoinitiating systems for near visible and visible light induced polymerizations [BibTeX] |
2013 | Polymer Vol. 54, pp. 2857-2864 |
article | |
BibTeX:
@article{Telitel2013a,
author = {Telitel, S. and Dumur, F. and Gigmes, D. and Graff, B. and Fouassier J.P. and Lalevee, J},
title = {New functionalized aromatic ketones as photoinitiating systems for near visible and visible light induced polymerizations},
journal = {Polymer},
year = {2013},
volume = {54},
pages = {2857-2864}
}
|
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| Telitel, S., Dumur, F., Faury, T., Graff, B., Tehfe, M.-A., Gigmes, D., Fouassier, J.-P. and Lalevee, J. | New core-pyrene π structure organophotocatalysts usable as highly efficient photoinitiators [BibTeX] |
2013 | Beilstein Journal of Organic Chemistry Vol. 9, pp. 877-890 |
article | DOI |
BibTeX:
@article{Telitel2013b,
author = {Sofia Telitel and Frédéric Dumur and Thomas Faury and Bernadette Graff and Mohamad-Ali Tehfe and Didier Gigmes and Jean-Pierre Fouassier and Jacques Lalevee},
title = {New core-pyrene π structure organophotocatalysts usable as highly efficient photoinitiators},
journal = {Beilstein Journal of Organic Chemistry},
year = {2013},
volume = {9},
pages = {877-890},
doi = {http://doi.org/10.3762/bjoc.9.101}
}
|
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| Telitel, S., Vallet, A.L., Schweizer, S., Delpech, B., Blanchard, N., Morlet-Savary, F., Graff, B., Curran, D.P., Robert, M., Lacote, E. and Lalevee, J. | Formation of N-Heterocyclic Carbene-Boryl Radicals through Electrochemical and Photochemical Cleavage of the B-S bond in N-Heterocyclic Carbene-Boryl Sulfides | 2013 | Journal of the American Chemical Society Vol. 135(45), pp. 16938-16947 |
article | DOI |
| Abstract: The B-S bond in N-heterocyclic carbene (NHC)-boryl sulfides can be cleaved homolytically to NHC-boryl or NHC-thioboryl and thiyl radicals using light, either directly around 300 nm or with a sensitizer at a longer wavelength (>340 nm). In contrast, the electrochemical reductive cleavage of the B-S bond is difficult. This easy photolytic cleavage makes the NHC-boryl sulfides good type I photopolymerization initiators for the polymerization of acrylates under air. | |||||
BibTeX:
@article{Telitel2013c,
author = {Telitel, S. and Vallet, A. L. and Schweizer, S. and Delpech, B. and Blanchard, N. and Morlet-Savary, F. and Graff, B. and Curran, D. P. and Robert, M. and Lacote, E. and Lalevee, J.},
title = {Formation of N-Heterocyclic Carbene-Boryl Radicals through Electrochemical and Photochemical Cleavage of the B-S bond in N-Heterocyclic Carbene-Boryl Sulfides},
journal = {Journal of the American Chemical Society},
year = {2013},
volume = {135},
number = {45},
pages = {16938--16947},
doi = {http://doi.org/10.1021/ja4066267}
}
|
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| Ton, X.A., Bui, B.T.S., Resmini, M., Bonomi, P., Dika, I., Soppera, O. and Haupt, K. | A Versatile Fiber-Optic Fluorescence Sensor Based on Molecularly Imprinted Microstructures Polymerized in Situ [BibTeX] |
2013 | Angewandte Chemie-international Edition Vol. 52(32), pp. 8317-8321 |
article | DOI |
BibTeX:
@article{Ton2013,
author = {Ton, X. A. and Bui, B. T. S. and Resmini, M. and Bonomi, P. and Dika, I. and Soppera, O. and Haupt, K.},
title = {A Versatile Fiber-Optic Fluorescence Sensor Based on Molecularly Imprinted Microstructures Polymerized in Situ},
journal = {Angewandte Chemie-international Edition},
year = {2013},
volume = {52},
number = {32},
pages = {8317--8321},
doi = {http://doi.org/10.1002/anie.201301045}
}
|
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| Vautard, F., Ozcan, S., Poland, L., Nardin, M. and Meyer, H. | Influence of thermal history on the mechanical properties of carbon fiber-acrylate composites cured by electron beam and thermal processes | 2013 | Composites Part A: Applied Science and Manufacturing Vol. 45(0), pp. 162-172 |
article | DOI URL |
| Abstract: The mechanical properties of an acrylate resin and its carbon fiber composite, as well as the adhesion strength between them, were characterized in the case of thermal and electron beam curing (with and without thermal post-cure). It was shown that the properties of the matrix were similar but that the thermal history during the curing had a direct influence on the type of interactions that were generated at the interface, leading to different level of adhesion strength and level of performance for the associated composites. In the case of a thermal cure, the thermal profile allowed the generation of covalent bonding at the interface by thermal degradation of carboxylic acid functionalities and simultaneous production of radicals at the surface of the fiber. A high level of adhesion strength was obtained, which was not the case for electron beam curing without a thermal post-cure at the appropriate temperature. | |||||
BibTeX:
@article{Vautard2013,
author = {Vautard, F. and Ozcan, S. and Poland, L. and Nardin, M. and Meyer, H.},
title = {Influence of thermal history on the mechanical properties of carbon fiber-acrylate composites cured by electron beam and thermal processes},
journal = {Composites Part A: Applied Science and Manufacturing},
year = {2013},
volume = {45},
number = {0},
pages = {162--172},
url = {http://www.sciencedirect.com/science/article/pii/S1359835X1200276X},
doi = {http://doi.org/10.1016/j.compositesa.2012.08.025}
}
|
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| Vautard, F., Fioux, P., Vidal, L., Dentzer, J., Schultz, J., Nardin, M. and Defoort, B. | Influence of an oxidation of the carbon fiber surface by boiling nitric acid on the adhesion strength in carbon fiber-acrylate composites cured by electron beam | 2013 | Surface and Interface Analysis Vol. 45(3), pp. 722-741 |
article | DOI URL |
| Abstract: A time-dependent oxidation of carbon fibers in boiling nitric acid was used to investigate the influence of a modification of the fiber surface properties on the adhesion strength with an acrylate resin cured by electron beam (EB). For each time of treatment, a characterization of the surface topography and the surface chemistry was done (topography at a micrometric and nanometric scale, specific surface area, temperature programmed desorption, X-ray photoelectron spectroscopy analysis). The oxidation of the fiber surface in boiling nitric acid created a rough surface, which significantly increased the specific surface area, and also generated a high density of hydroxyl groups, carboxylic acids and lactones in comparison to untreated fibers. The adhesion strength with the acrylate resin cured by EB was measured by a pull-out test. For comparison, an isothermal ultraviolet curing of the matrix was also investigated. The value of the interfacial shear strength, determined by the Greszczuk's model, was increased by the oxidation of the carbon fiber surface for both curing processes, but lower values were systemically obtained with EB curing. Copyright © 2012 John Wiley & Sons, Ltd. | |||||
BibTeX:
@article{Vautard2013a,
author = {Vautard, F. and Fioux, P. and Vidal, L. and Dentzer, J. and Schultz, J. and Nardin, M. and Defoort, B.},
title = {Influence of an oxidation of the carbon fiber surface by boiling nitric acid on the adhesion strength in carbon fiber-acrylate composites cured by electron beam},
journal = {Surface and Interface Analysis},
year = {2013},
volume = {45},
number = {3},
pages = {722--741},
url = {http://dx.doi.org/10.1002/sia.5147},
doi = {http://doi.org/10.1002/sia.5147}
}
|
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| Vautard, F., Fioux, P., Vidal, L., Dentzer, J., Schultz, J., Nardin, M. and Defoort, B. | Modification of the Carbon Fiber Surface by Oxygen Plasma and its Influence on Adhesion Strength in Acrylate-Based Composites Cured by Electron Beam and Ultra Violet Light | 2013 | The Journal of Adhesion Vol. 89(6)The Journal of Adhesion, pp. 460-485 |
article | DOI URL |
| Abstract: Oxygen plasma was used to modify the surface properties of carbon fibers and their adhesion strength with an acrylate resin cured by electron beam. A characterization of the surface topography and the surface chemistry was carried out (topography at a micrometric and nanometric scale, specific surface area, temperature programmed desorption, and X-ray photoelectron spectroscopy). The topography remained unchanged. Regarding the surface chemistry, carboxylic acids, alcohols, lactones, and ethers were created and their location was at the outer surface of the fibers. A pull-out test was used to measure the adhesion strength with the acrylate resin cured by electron beam. For comparison, an isothermal UV curing was also investigated. The value of the interfacial shear strength was increased only in the case of UV curing. No improvement was observed with electron beam curing, which highlighted the generation of an interphase, the mechanical properties of which are dependent on the processing conditions. Oxygen plasma was used to modify the surface properties of carbon fibers and their adhesion strength with an acrylate resin cured by electron beam. A characterization of the surface topography and the surface chemistry was carried out (topography at a micrometric and nanometric scale, specific surface area, temperature programmed desorption, and X-ray photoelectron spectroscopy). The topography remained unchanged. Regarding the surface chemistry, carboxylic acids, alcohols, lactones, and ethers were created and their location was at the outer surface of the fibers. A pull-out test was used to measure the adhesion strength with the acrylate resin cured by electron beam. For comparison, an isothermal UV curing was also investigated. The value of the interfacial shear strength was increased only in the case of UV curing. No improvement was observed with electron beam curing, which highlighted the generation of an interphase, the mechanical properties of which are dependent on the processing conditions. | |||||
BibTeX:
@article{Vautard2013b,
author = {Vautard, F. and Fioux, P. and Vidal, L. and Dentzer, J. and Schultz, J. and Nardin, M. and Defoort, B.},
title = {Modification of the Carbon Fiber Surface by Oxygen Plasma and its Influence on Adhesion Strength in Acrylate-Based Composites Cured by Electron Beam and Ultra Violet Light},
booktitle = {The Journal of Adhesion},
journal = {The Journal of Adhesion},
publisher = {Taylor & Francis},
year = {2013},
volume = {89},
number = {6},
pages = {460--485},
url = {http://dx.doi.org/10.1080/00218464.2013.759428},
doi = {http://doi.org/10.1080/00218464.2013.759428}
}
|
|||||
| Vautard, F., Fioux, P., Vidal, L., Schultz, J., Nardin, M. and Defoort, B. | Grafting acrylate functionalities at the surface of carbon fibers to improve adhesion strength in carbon fiber-acrylate composites cured by electron beam | 2013 | Journal of adhesion science and technology Vol. 27(21), pp. 2352-2366 |
article | DOI |
| Abstract: Acrylate functionalities were grafted at the surface of carbon fibers in order to improve the adhesion strength with an acrylate matrix cured by electron beam. An isocyanate bearing aliphatic urethane acrylate was used as a coupling agent. As revealed by X-ray photoelectron spectroscopy, the isocyanate groups reacted with carboxylic acids and hydroxyl groups located at the surface of the fiber, leading to a covalent bonding of the acrylate groups. The adhesion strength was measured by a micromechanical test derived from the pull-out test. A significant improvement of the interfacial shear strength was obtained (+91%) with an electron beam curing. For comparison, an isothermal cure by UV was also investigated and led to the same level of adhesion strength. The improvement was also proved by an increase in the 90° flexural strength of unidirectional composites (+38%). Grafting functionalities that were compatible with the radical mechanism of the polymerization of the matrix appeared to be a promising strategy for the improvement of the mechanical properties of carbon fiber–acrylate composites cured by electron beam. | |||||
BibTeX:
@article{Vautard2013c,
author = {Vautard, F. and Fioux, P. and Vidal, L. and Schultz, J. and Nardin, M. and Defoort, B.},
title = {Grafting acrylate functionalities at the surface of carbon fibers to improve adhesion strength in carbon fiber-acrylate composites cured by electron beam},
journal = {Journal of adhesion science and technology},
year = {2013},
volume = {27},
number = {21},
pages = {2352-2366},
doi = {http://doi.org/10.1080/01694243.2013.776443}
}
|
|||||
| Vautard, F., Fioux, P., Schultz, J., Nardin, M. and Defoort, B. | Using the thiol-ene reaction to improve adhesion strength in carbon fiber-acrylate composites cured by ultra violet light | 2013 | Applied Surface Science Vol. 286(0), pp. 12-21 |
article | URL |
| Abstract: Abstract Thiol functionalities were grafted at the surface of carbon fibers in order to improve the adhesion strength with an acrylate matrix photo-cured by ultraviolet light via a thiol-ene reaction. As revealed by X-ray photoelectron spectroscopy, the grafting was achieved by a reaction between propylene sulfide and the hydroxyl groups located at the surface of the fiber, with the presence of triethylamine. A significant improvement of the interfacial shear strength, measured by a micromechanical test derived from the pull-out test, was obtained (+18%). Generating covalent bonding between the carbon fiber surface and a thermoset polymerizing through a radical mechanism by grafting a chain transfer agent seemed to be an efficient way to improve adhesion strength at the interface. | |||||
BibTeX:
@article{Vautard2013d,
author = {Vautard, F. and Fioux, P. and Schultz, J. and Nardin, M. and Defoort, B.},
title = {Using the thiol-ene reaction to improve adhesion strength in carbon fiber-acrylate composites cured by ultra violet light},
journal = {Applied Surface Science},
year = {2013},
volume = {286},
number = {0},
pages = {12--21},
url = {http://www.sciencedirect.com/science/article/pii/S0169433213016176}
}
|
|||||
| Velasco, L., Haro, M., Parmentier, J., Gadiou, R., Vix-Guterl, C. and Ania, C.O. | Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold | 2013 | Journal of Catalysts Vol. -, pp. 9 pages |
article | DOI |
| Abstract: The photoelectrochemical response and catalytic efficiency towards phenol photooxidation of mesoporous titania particles with spherical morphology have been explored. The catalysts were synthesized in two different arrangements using carbon spheres in a dual role as support and morphology director: hollow spherical titania particles and dense structures where the titania shell is surrounding a carbon core. Although the synthesized titania hollow spheres exhibited a similar photoelectrochemical behavior and optical properties than commercial P25, they showed a better photocatalytic response towards phenol photo-oxidation in terms of pollutant mineralization. This behavior cannot be explained in terms of the crystallinity (found to be higher for P25) and has been attributed to both confinement effects in the mesoporosity of these catalysts as well as to the spherical morphology of titania particles. The spherical arrangement of the titania surface would favor the fast motion of the charge carriers and minimize recombination processes. On the other hand, no clear contribution of the carbon phase to the enhanced photocatalytic response, since quite similar performance is observed for the hollow spheres and the core/shell composite. However, separation and filtration of the catalysts become easier for the carbon/titania composite, thereby improving the so-called practical efficiency. | |||||
BibTeX:
@article{Velasco2013,
author = {Velasco, L.F. and Haro, M. and Parmentier, J. and Gadiou, R. and Vix-Guterl, C. and Ania, C. O.},
title = {Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold},
journal = {Journal of Catalysts},
year = {2013},
volume = {-},
pages = {9 pages},
doi = {http://doi.org/10.1155/2013/178512}
}
|
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| Versace, D.-L., Dalmas, F., Fouassier, J.-P. and Lalevee, J. | Zirconocene Dichloride: An Efficient Cleavable Photoinitiator Allowing the in Situ Production of Zr-Based Nanoparticles Under Air | 2013 | ACS Macro Lett. Vol. 2(4)ACS Macro Letters, pp. 341-345 |
article | DOI URL |
| Abstract: Cp2ZrCl2 is presented as both an effective photoinitiator and additive for radical photopolymerization reactions in aerated conditions. This compound is characterized by remarkable properties: (i) an efficiency higher than that of a reference Type I photoinitiator (2,2-dimethoxy-2-phenylacetophenone, DMPA), (ii) an excellent ability, when added to DMPA, to overcome the oxygen inhibition of the polymerization, and (iii) a never reported in situ photoinduced and oxygen-mediated formation of zirconium-based nanoparticles (diameter ranging from 50 to 70 nm). The photochemical properties of Cp2ZrCl2 are investigated by steady state photolysis and electron spin resonance (ESR) experiments. The high reactivity of this compound is ascribed to a bimolecular homolytic substitution SH2 (clearly characterized by molecular orbital calculations) which converts the peroxyls into new polymerization-initiating radicals and oxygenated Zr-based nanoparticles. Cp2ZrCl2 is presented as both an effective photoinitiator and additive for radical photopolymerization reactions in aerated conditions. This compound is characterized by remarkable properties: (i) an efficiency higher than that of a reference Type I photoinitiator (2,2-dimethoxy-2-phenylacetophenone, DMPA), (ii) an excellent ability, when added to DMPA, to overcome the oxygen inhibition of the polymerization, and (iii) a never reported in situ photoinduced and oxygen-mediated formation of zirconium-based nanoparticles (diameter ranging from 50 to 70 nm). The photochemical properties of Cp2ZrCl2 are investigated by steady state photolysis and electron spin resonance (ESR) experiments. The high reactivity of this compound is ascribed to a bimolecular homolytic substitution SH2 (clearly characterized by molecular orbital calculations) which converts the peroxyls into new polymerization-initiating radicals and oxygenated Zr-based nanoparticles. | |||||
BibTeX:
@article{Versace2013,
author = {Versace, Davy-Louis and Dalmas, Florent and Fouassier, Jean-Pierre and Lalevee, Jacques},
title = {Zirconocene Dichloride: An Efficient Cleavable Photoinitiator Allowing the in Situ Production of Zr-Based Nanoparticles Under Air},
booktitle = {ACS Macro Letters},
journal = {ACS Macro Lett.},
publisher = {American Chemical Society},
year = {2013},
volume = {2},
number = {4},
pages = {341--345},
url = {http://dx.doi.org/10.1021/mz400081p},
doi = {http://doi.org/10.1021/mz400081p}
}
|
|||||
| Versace, D.-L., Ramier, J., Grande, D., Andaloussi, S.A., Dubot, P., Hobeika, N., Malval, J.-P., Lalevee, J., Renard, E. and Langlois, V. | Versatile Photochemical Surface Modification of Biopolyester Microfibrous Scaffolds with Photogenerated Silver Nanoparticles for Antibacterial Activity | 2013 | Advanced Healthcare Materials Vol. 2(7), pp. 1008-1018 |
article | URL |
| Abstract: A straightforward and versatile method for immobilizing macromolecules and silver nanoparticles on the surface of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) electrospun fibers is developed with the objective of designing a new functional material having significant antibacterial activity. The approach relies on a two-step procedure: UV photografting of poly(methacrylic acid) (PMAA) on the surface of PHBHV fibers according to a “grafting from” method, and complexation of in situ photogenerated silver nanoparticles (Ag NPs) by carboxyl groups from tethered PMAA chains. The photografting process is conducted through a photoinduced free-radical process employing a ketone-based photoinitiator in aqueous medium. Under appropriate conditions, the photogenerated radicals abstract hydrogen atoms from the PHBHV backbone, thus initiating the UV-mediated photopolymerization of MAA from the PHBHV microfibrous surface. The photochemical mechanism of the ketone photolysis is entirely described by the electron spin resonance/spin-trapping technique, and the modified PHBHV microfibrous scaffold is extensively characterized by ATR-FTIR spectroscopy, water contact-angle measurements, and mercury intrusion porosimetry. In a second step, the in situ synthesis of Ag NPs within the microfibrous scaffold is implemented by photoreduction reaction in the presence of both a silver precursor and a photosensitizer. The photoinduced formation of Ag NPs is confirmed by UV spectrophotometry and XPS analysis. SEM and TEM experiments confirm the formation and dispersion of Ag NPs on the surface of the modified fibers. Finally, a primary investigation is conducted to support the antibacterial activity of the new functionalized biomaterial against Staphylococcus aureus and Escherichia coli. | |||||
BibTeX:
@article{Versace2013a,
author = {Versace, Davy-Louis and Ramier, Julien and Grande, Daniel and Andaloussi, Samir Abbad and Dubot, Pierre and Hobeika, Nelly and Malval, Jean-Pierre and Lalevee, Jacques and Renard, Estelle and Langlois, Valerie},
title = {Versatile Photochemical Surface Modification of Biopolyester Microfibrous Scaffolds with Photogenerated Silver Nanoparticles for Antibacterial Activity},
journal = {Advanced Healthcare Materials},
publisher = {WILEY-VCH Verlag},
year = {2013},
volume = {2},
number = {7},
pages = {1008-1018},
url = {http://dx.doi.org/10.1002/adhm.201200269}
}
|
|||||
| Versace, D.L., Ramier, J., Babinot, J., Lemechko, P., Soppera, O., Lalevee, J., Albanese, P., Renard, E. and Langlois, V. | Photoinduced modification of the natural biopolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) microfibrous surface with anthraquinone-derived dextran for biological applications | 2013 | Journal of Materials Chemistry B Vol. 1(37), pp. 4834-4844 |
article | DOI |
| Abstract: A straightforward and versatile method for immobilizing polysaccharides on the surface of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) electrospun fibers is developed with the objective of designing a new functional biomaterial having a significant effect on cell proliferation. The approach relies on a one-step procedure: UV grafting of a photosensitive dextran (AQ-Dext) on the surface of PHBHV fibers according to a "grafting onto" method, with the use of an anthraquinone derivative. The photografting is conducted through a photoinduced free radical process employing an anthraquinone-based photosensitizer in aqueous medium. Under appropriate conditions, AQ-Dext reacts with C-H sigma-bonds of the polymer substrate (PHBHV) to produce a semianthraquinone radical according to an H-abstraction reaction. This radical recombines together with the alkylradical (R-center dot) formed at the surface of PHBHV fibers via the oxygen atom of the anthraquinone photolinker. The photochemical mechanism of the AQ-Dext photolysis is entirely described for the first time by an electron spin resonance technique and laser flash photolysis. The modified PHBHV microfibrous scaffolds are extensively characterized by water contact angle measurements, XPS analysis and atomic force microscopy, confirming the covalent grafting of dextran on PHBHV fibers. Finally, a primary investigation demonstrates that dextran modified PHBHV fibers are permissive for optimized cell colonization and proliferation. The cell morphologies are described by SEM micrographs, revealing a significant affinity and favorable interactions for adherence of human mesenchymal stem cells (hMSCs) on scaffolds provided by dextran chemical structure. Moreover, the proliferation rate of hMSCs increases on this new functionalized biomaterial associated with a higher extra-cellular matrix production after 5 days of culture in comparison with native PHBHV fibers. | |||||
BibTeX:
@article{Versace2013b,
author = {Versace, D. L. and Ramier, J. and Babinot, J. and Lemechko, P. and Soppera, O. and Lalevee, J. and Albanese, P. and Renard, E. and Langlois, V.},
title = {Photoinduced modification of the natural biopolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) microfibrous surface with anthraquinone-derived dextran for biological applications},
journal = {Journal of Materials Chemistry B},
year = {2013},
volume = {1},
number = {37},
pages = {4834--4844},
doi = {http://doi.org/10.1039/c3tb20869a}
}
|
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| Versace, D.L., Bastida, J.C., Lorenzini, C., Cachet-Vivier, C., Renard, E., Langlois, V., Malval, J.P., Fouassier, J.P. and Lalevee, J. | A Tris(triphenylphosphine)ruthenium(II) Complex as a UV Photoinitiator for Free-Radical Polymerization and in Situ Silver Nanoparticle Formation in Cationic Films | 2013 | Macromolecules Vol. 46(22), pp. 8808-8815 |
article | DOI |
| Abstract: The characterization and the photochemical investigation of a Ru-II complex (Ru(PPh3)(3)Cl-2) having phosphine ligands are reported. DFT calculations and ESR spin trapping experiments revealed for the first time that the photodecomposition of the complex is governed by a homolytic cleavage of the P (C6H5) bond generating phenyl radicals Ph-center dot which are able to initiate the free radical polymerization of acrylate monomers. The addition of a H-donor HD plays a key role in the cationic photopolymerization of epoxides: (i) the reaction efficiency is enhanced using [Ru(PPh3)(3)Cl-2]/HD and (ii) the in situ formation of Ag nanoparticles is observed in the presence of Ru(PPh3)(3)Cl-2/HD/AgSbF6 according to the following reactions: Ph-center dot/DH hydrogen abstraction yielding a D-center dot radical and oxidation of D-center dot by the silver salt. | |||||
BibTeX:
@article{Versace2013c,
author = {Versace, D. L. and Bastida, J. C. and Lorenzini, C. and Cachet-Vivier, C. and Renard, E. and Langlois, V. and Malval, J. P. and Fouassier, J. P. and Lalevee, J.},
title = {A Tris(triphenylphosphine)ruthenium(II) Complex as a UV Photoinitiator for Free-Radical Polymerization and in Situ Silver Nanoparticle Formation in Cationic Films},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {22},
pages = {8808--8815},
doi = {http://doi.org/10.1021/ma4019872}
}
|
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| Vonna, L., Haidara Hamidou and castelein , N. | Morphology and stability of water condensation structures on a series of self-similar micropatterned substrates | 2013 | Soft Matter Vol. 9(3), pp. 765-771 |
article | URL |
| Abstract: In this work, we report on the morphology and stability of water domains growing by condensation on flat chemically micropatterned substrates. The surface pattern consists of hydrophobic hexagonal domains that are distributed following a hexagonal lattice in a hydrophilic continuum. The size and spacing of the hexagons are varied from one sample to the other in such a way as to produce a series of self-similar surface patterns. The size and stability of the water condensation structures growing on these surfaces are investigated in relation to the pattern size and the chemical contrast between the wetted continuum and the non-wetted hydrophobic domains. The water structures that initially grow and spread over the hydrophilic continuum are found to be unstable, collapsing on the hydrophobic domains at a characteristic (normalized) size, which is shown to be independent of the patterns, for a given chemical contrast. This scale invariance of the condensation structures is discussed on the basis of the self-similar variation of the characteristic sizes of the patterns that drive their instability and collapse. Finally, we show that for a high enough chemical contrast, the condensation structure could be tuned into a stable continuum water film that surrounds "dry" spots of non-wetted hydrophobic hexagons. | |||||
BibTeX:
@article{Vonna2013,
author = {Vonna, Laurent and Haidara, Hamidou, and castelein, N.},
title = {Morphology and stability of water condensation structures on a series of self-similar micropatterned substrates},
journal = {Soft Matter},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {9},
number = {3},
pages = {765--771},
url = {http://dx.doi.org/10.1039/C2SM26838H}
}
|
|||||
| Wang, J.B., Odarchenko, Y.I., Defaux, M., Lejnieks, J., Ahokhin, D.V., Keul, H., Ivanov, D.A., Moller, M. and Mourran, A. | Concurrent Order in a Semi-Crystalline Diblock Copolymer Involving Complexation with a Mesogen | 2013 | Macromolecules Vol. 46(15), pp. 6159-6168 |
article | DOI |
| Abstract: A semicrystalline/liquid-crystalline diblock co-polymer formed by complexation of a wedge-shaped ligand, 2-(3',4',5'-tris(octyloxy)benzamido)propanoic acid, with P2VP-PEO copolymer was studied. The P2VP complex forms layers with a liquid-crystalline (LC) order causing phase segregation of the PEO block. The molar ratio ligand/pyridine (x) determines the strength of segregation between the blocks and the microphase morphology. For x >= 0.5, PEO forms cylinders within the LC matrix. The phase separation strongly shifts the crystallization temperature to lower values and forces PEO to crystallize within the block copolymer cylinders. In thin films, alignment of the smectic layers parallel to the substrate induces homeotropic orientation of the PEO cylinders. Inside these cylinders, the crystalline stems preferentially orient along the smectic normal. For x <= 0.33, PEO forms crystalline lamellae within the LC matrix and crystallization dominates the final structure. | |||||
BibTeX:
@article{Wang2013,
author = {Wang, J. B. and Odarchenko, Y. I. and Defaux, M. and Lejnieks, J. and Ahokhin, D. V. and Keul, H. and Ivanov, D. A. and Moller, M. and Mourran, A.},
title = {Concurrent Order in a Semi-Crystalline Diblock Copolymer Involving Complexation with a Mesogen},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {15},
pages = {6159--6168},
doi = {http://doi.org/10.1021/ma4008797}
}
|
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| Wu, W., Yang, P., Ma, L., Lalevee, J. and Zhao, J. | Visible-Light Harvesting PtII Complexes as Singlet Oxygen Photosensitizers for Photooxidation of 1,5-Dihydroxynaphthalene | 2013 | Eur. J. Inorg. Chem. Vol. 2013(2), pp. 228-231 |
article | URL |
| Abstract: Cyclometalated PtII complexes that show strong visible-light absorption and long-lived triplet excited states were used as efficient singlet oxygen (1O2) sensitizers for the photooxidation of 1,5-dihydroxynaphthalene (DHN). The photooxidation velocity of the cyclometalated PtII complex is 4.4 times that of the conventional IrIII complex triplet photosensitizers that do not show strong absorption of visible light. | |||||
BibTeX:
@article{Wu2013,
author = {Wu, Wenting and Yang, Pei and Ma, Lihua and Lalevee, Jacques and Zhao, Jianzhang},
title = {Visible-Light Harvesting PtII Complexes as Singlet Oxygen Photosensitizers for Photooxidation of 1,5-Dihydroxynaphthalene},
journal = {Eur. J. Inorg. Chem.},
publisher = {WILEY-VCH Verlag},
year = {2013},
volume = {2013},
number = {2},
pages = {228--231},
url = {http://dx.doi.org/10.1002/ejic.201200665}
}
|
|||||
| Xiao.P., Dumur, F., Graff, B., Fouassier, J.P. and Lal | Red-light-induced cationic photopolymerization: perylene derivatives as efficient photoinitiators | 2013 | Macromol Rapid Commun. Vol. 34(18), pp. 1452-1458 |
article | DOI |
| Abstract: Nine different perylene derivatives are prepared and their ability to initiate, when combined with an iodonium salt (and optionally N-vinylcarbazole), a ring-opening cationic photopolymerization of epoxides under very soft halogen lamp irradiation is investigated. One of them is particularly efficient under a red laser diode exposure at 635 nm and belongs now to the very few systems available at this wavelength. The photochemical mechanisms are studied by steady-state photolysis, electron spin resonance spin trapping, fluorescence, cyclic voltammetry, and laser flash photolysis techniques. | |||||
BibTeX:
@article{Xiao.P.2013,
author = {Xiao.P. And Dumur, F. and Graff, B. and Fouassier J.P. and Lal},
title = {Red-light-induced cationic photopolymerization: perylene derivatives as efficient photoinitiators},
journal = {Macromol Rapid Commun.},
year = {2013},
volume = {34},
number = {18},
pages = {1452-1458},
doi = {doi: 10.1002/marc.201300383}
}
|
|||||
| Xiao, P., Dumur, F., Graff, B., Fouassier, J.P., Gigmes, D. and Lalevee, J. | Cationic and Thiol–Ene Photopolymerization upon Red Lights Using Anthraquinone Derivatives as Photoinitiators | 2013 | Macromolecules Vol. 46(17), pp. 6744-6750 |
article | DOI |
| Abstract: Anthraquinone derivatives in combination with an iodonium salt (and optionally N-vinylcarbazole) have been used as photoinitiating systems. One of them (Oil Blue N) that is particularly efficient for cationic, IPN, and thiol–ene polymerization upon red lights (laser diode at 635 nm or household red LED bulb at 630 nm) belongs to the very few systems available at this long wavelength in such experimental conditions (low light intensity in the 10–100 mW/cm2 range). Their abilities to initiate the cationic photopolymerization of epoxides or vinyl ethers under very soft halogen lamp irradiation have been also investigated. The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, and electron spin resonance spin trapping techniques. | |||||
BibTeX:
@article{Xiao2013c,
author = {Xiao, P. and Dumur, F. and Graff, B. and Fouassier J.P. and Gigmes, D. and Lalevee, J},
title = {Cationic and Thiol–Ene Photopolymerization upon Red Lights Using Anthraquinone Derivatives as Photoinitiators},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {17},
pages = {6744-6750},
doi = {http://doi.org/10.1021/ma401513b}
}
|
|||||
| Xiao, P., Dumur, F., Tehfe, M.-A., Graff, B., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Difunctional acridinediones as photoinitiators of polymerization under UV and visible lights: Structural effects | 2013 | Polymer Vol. 54(14), pp. 3458-3466 |
article | URL |
| Abstract: Abstract Seven difunctional acridinediones DAD were prepared and investigated for their abilities to initiate a ring-opening cationic photopolymerization in combination with an iodonium salt (and optionally N-vinylcarbazole) upon UV/visible light (Xe-Hg lamp; >330 nm) or visible light (halogen lamp) exposure. The structural effects in the DADs and the role of the radical cation are outlined. The cationic and radical photopolymerization of an epoxide/acrylate blend in a one-step hybrid cure leads to the formation of an interpenetrated polymer network. The photochemical mechanisms are studied by fluorescence, steady state photolysis, cyclic voltammetry, electron spin resonance spin trapping, and laser flash photolysis techniques. | |||||
BibTeX:
@article{Xiao2013i,
author = {Xiao, Pu and Dumur, Frédéric and Tehfe, Mohamad-Ali and Graff, Bernadette and Gigmes, Didier and Fouassier, Jean Pierre and Lalevee, Jacques},
title = {Difunctional acridinediones as photoinitiators of polymerization under UV and visible lights: Structural effects},
journal = {Polymer},
year = {2013},
volume = {54},
number = {14},
pages = {3458--3466},
url = {http://www.sciencedirect.com/science/article/pii/S0032386113004059}
}
|
|||||
| Xiao, P., Dumur, F., Thirion, D., Fagour, S., Vacher, A., Sallenave, X., Morlet-Savary, F., Graff, B., Fouassier, J.P., Gigmes, D. and Lale | Multicolor Photoinitiators for Radical and Cationic Polymerization: Monofunctional vs Polyfunctional Thiophene Derivatives [BibTeX] |
2013 | Macromolecules Vol. 46(46), pp. 6786-6793 |
article | DOI |
BibTeX:
@article{Xiao2013k,
author = {Xiao, P. and Dumur, F. and Thirion, D. and Fagour, S. and Vacher, A. and Sallenave, X. and Morlet-Savary, F and Graff, B. and Fouassier J.P. and Gigmes, D. and Lale},
title = {Multicolor Photoinitiators for Radical and Cationic Polymerization: Monofunctional vs Polyfunctional Thiophene Derivatives},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {46},
pages = {6786-6793},
doi = {DOI: 10.1021/ma401389t}
}
|
|||||
| Xiao, P., Dumur, F., Frigoli, M., Tehfe, M.-A., Graff, B., Fouassier, J.P., Gigmes, D. and Lalevee, J. | Naphthalimide based methacrylated photoinitiators in radical and cationic photopolymerization under visible light | 2013 | Polym. Chem. Vol. 4, pp. 5440-5448 |
article | DOI URL |
| Abstract: The abilities of two naphthalimide derivatives with a methacryloyl group to initiate, when incorporated in multi-component systems, a ring-opening polymerization of epoxides and a radical polymerization of acrylates under different irradiation sources (e.g. very soft halogen lamp irradiation, laser diode at 457 nm, laser diode at 405 nm and blue LED bulb at 462 nm) have been investigated. One of them is particularly efficient for the cationic and radical photopolymerization of an epoxide/acrylate blend in a one-step hybrid cure and leads to the formation of an interpenetrated polymer network IPN (30 s for getting tack free coatings). The migration stability of one of these naphthalimide derivatives is found to be excellent in the cured polyacrylates and IPNs. The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping and laser flash photolysis techniques. | |||||
BibTeX:
@article{Xiao2013l,
author = {Xiao, Pu and Dumur, Frederic and Frigoli, Michel and Tehfe, Mohamad-Ali and Graff, Bernadette and Fouassier, Jean Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {Naphthalimide based methacrylated photoinitiators in radical and cationic photopolymerization under visible light},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
pages = {5440-5448},
url = {http://dx.doi.org/10.1039/C3PY00766A},
doi = {http://doi.org/10.1039/C3PY00766A}
}
|
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| Xiao, P., Dumur, F., Tehfe, M.-A., Graff, B., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Acridinediones: Effect of Substituents on Their Photoinitiating Abilities in Radical and Cationic Photopolymerization [BibTeX] |
2013 | Macromolecular Chemistry and Physics Vol. 214(20), pp. 2276-2282 |
article | |
BibTeX:
@article{Xiao2013m,
author = {Xiao, Pu and Dumur, Frederic and Tehfe, Mohamad-Ali and Graff, Bernadette and Gigmes, Didier and Fouassier, Jean Pierre and Lalevee, Jacques},
title = {Acridinediones: Effect of Substituents on Their Photoinitiating Abilities in Radical and Cationic Photopolymerization},
journal = {Macromolecular Chemistry and Physics},
year = {2013},
volume = {214},
number = {20},
pages = {2276--2282}
}
|
|||||
| Xiao, P., Simonnet-Jegat, C., Dumur, F., Schrodj, G., Tehfe, M.-A., Fouassier, J.P., Gigmes, D. and Lalevee, J. | Photochemical in situ elaboration of polyoxometalate ([small alpha]-[SiMo12O40]4-)/polymer hybrid materials | 2013 | Polym. Chem. Vol. 4, pp. 4526-4530 |
article | DOI URL |
| Abstract: [small alpha]-Silicon polyoxomolybdates in combination with an iodonium salt and/or a silane are used to generate phenyl and/or silyl radicals as well as silylium cations upon UV light irradiation. These species can initiate the radical photopolymerization of acrylates, the cationic photopolymerization of epoxides and the photopolymerization of epoxy/acrylate blends (i.e. for the synthesis of interpenetrated polymer networks) thereby leading to the formation of polyoxometalate/polymer hybrid materials. The mechanical properties of e.g. the polyether films are affected by the presence of polyoxometalate in the matrix as shown by their dynamic mechanical analysis (DMA). The photochemical mechanisms are studied by steady state photolysis, cyclic voltammetry, and electron spin resonance techniques. | |||||
BibTeX:
@article{Xiao2013n,
author = {Xiao, Pu and Simonnet-Jegat, Corine and Dumur, Frederic and Schrodj, Gautier and Tehfe, Mohamad-Ali and Fouassier, Jean Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {Photochemical in situ elaboration of polyoxometalate ([small alpha]-[SiMo12O40]4-)/polymer hybrid materials},
journal = {Polym. Chem.},
publisher = {The Royal Society of Chemistry},
year = {2013},
volume = {4},
pages = {4526-4530},
url = {http://dx.doi.org/10.1039/C3PY00632H},
doi = {http://doi.org/10.1039/C3PY00632H}
}
|
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| Xiao, P., Dumur, F., Bui, T.T., Goubard, F., Graff, B., Morlet-Savary, F., Fouassier, J.P., Gigmes, D. and Lalevee, J. | Panchromatic Photopolymerizable Cationic Films Using Indoline and Squaraine Dye Based Photoinitiating Systems | 2013 | ACS Macro Lett. Vol. 2(8)ACS Macro Letters, pp. 736-740 |
article | DOI URL |
| Abstract: The photoinitiating abilities of indoline and squaraine dyes (D102 and SQ02) incorporated in multicomponent systems for the cationic polymerization of an epoxide or a vinyl ether have been investigated. The polymerizable films exhibit a panchromatic character as revealed by their photosensitivity to a halogen lamp (370?800 nm); household LED bulbs centered at 462 nm (blue), 514 nm (green), 591 nm (yellow), and 630 nm (red); and laser diodes at 457, 473, 532, and 635 nm. SQ02 is particularly efficient in the 520?700 nm range, while D102 exhibits a good efficiency in the 400?580 nm region. The radical photopolymerization of an acrylate can also be observed particularly at 635 nm or upon a halogen lamp. The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping, and laser flash photolysis techniques. The photoinitiating abilities of indoline and squaraine dyes (D102 and SQ02) incorporated in multicomponent systems for the cationic polymerization of an epoxide or a vinyl ether have been investigated. The polymerizable films exhibit a panchromatic character as revealed by their photosensitivity to a halogen lamp (370?800 nm); household LED bulbs centered at 462 nm (blue), 514 nm (green), 591 nm (yellow), and 630 nm (red); and laser diodes at 457, 473, 532, and 635 nm. SQ02 is particularly efficient in the 520?700 nm range, while D102 exhibits a good efficiency in the 400?580 nm region. The radical photopolymerization of an acrylate can also be observed particularly at 635 nm or upon a halogen lamp. The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping, and laser flash photolysis techniques. | |||||
BibTeX:
@article{Xiao2013o,
author = {Xiao, Pu and Dumur, Frédéric and Bui, Thanh Tuan and Goubard, Fabrice and Graff, Bernadette and Morlet-Savary, Fabrice and Fouassier, Jean Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {Panchromatic Photopolymerizable Cationic Films Using Indoline and Squaraine Dye Based Photoinitiating Systems},
booktitle = {ACS Macro Letters},
journal = {ACS Macro Lett.},
publisher = {American Chemical Society},
year = {2013},
volume = {2},
number = {8},
pages = {736--740},
url = {http://dx.doi.org/10.1021/mz400316y},
doi = {http://doi.org/10.1021/mz400316y}
}
|
|||||
| Xiao, P., Dumur, F., Graff, B., Gigmes, D., Fouassier, J.P. and Lalevee, J. | Variations on the Benzophenone Skeleton: Novel High Performance Blue Light Sensitive Photoinitiating Systems | 2013 | Macromolecules Vol. 46(19), pp. 7661-7667 |
article | DOI |
| Abstract: Newly developed benzophenone derivatives in combination with an iodonium salt (and optionally N-vinylcarbazole) or amines have been used as photoinitiating systems. Their abilities to initiate cationic photopolymerization of epoxides and/or radical photopolymerization of acrylates under very soft visible halogen lamp, LED and laser diodes irradiations have been investigated. One of them (BPD5) is particularly efficient for the cationic and radical photopolymerization of an epcocide/acrylate blend in a one-step hybrid cure and leads to the formation of an interpenetrated polymer network IPN upon the house hold blue LED bulb exposure (1 min for getting tack free coatings). The performances attained with some derivatives are better than those obtained with camphorquinone, used as reference photoinitiator, highlighting their high initiating abilities. These systems can be useful to overcome the oxygen inhibition for very low light intensity. The photochemical mechanisms are studied by molecular orbital calculations, fluorescence, cyclic voltammetry, laser flash photolysis, electron spin resonance spin trapping, and steady state photolysis techniques. | |||||
BibTeX:
@article{Xiao2013p,
author = {Xiao, P. and Dumur, F. and Graff, B. and Gigmes, D. and Fouassier, J. P. and Lalevee, J.},
title = {Variations on the Benzophenone Skeleton: Novel High Performance Blue Light Sensitive Photoinitiating Systems},
journal = {Macromolecules},
year = {2013},
volume = {46},
number = {19},
pages = {7661--7667},
doi = {http://doi.org/10.1021/ma401766v}
}
|
|||||
| Xiao, P., Dumur, F., Tehfe, M.-A., Graff, B., Fouassier, J.P., Gigmes, D. and Lalevee, J. | Keggin-Type Polyoxometalate ([PMo12O40]3−) in Radical Initiating Systems: Application to Radical and Cationic Photopolymerization Reactions | 2013 | Macromol. Chem. Phys. Vol. 214(15), pp. 1749-1755 |
article | URL |
| Abstract: New photoinitiating systems based on a polyoxometalate (POM) are proposed: phosphomolybdic acid in combination with silane, germane, or iodonium salt can be used to generate silyl, germyl, or phenyl radicals as well as silylium cations. The photochemical mechanisms are studied by steady-state photolysis and electron spin resonance. The phosphomolybdic acid/silane/iodonium salt system can initiate either the radical photopolymerization of acrylates or the cationic photopolymerization of epoxides. The synthesis of interpenetrated polymer networks can also be carried out. The mechanical properties of the synthesized polymers are affected by the presence of POM in the matrix, as shown by their dynamic mechanical analysis (DMA). | |||||
BibTeX:
@article{Xiao2013q,
author = {Xiao, Pu and Dumur, Frédéric and Tehfe, Mohamad-Ali and Graff, Bernadette and Fouassier, Jean Pierre and Gigmes, Didier and Lalevee, Jacques},
title = {Keggin-Type Polyoxometalate ([PMo12O40]3−) in Radical Initiating Systems: Application to Radical and Cationic Photopolymerization Reactions},
journal = {Macromol. Chem. Phys.},
publisher = {WILEY-VCH Verlag},
year = {2013},
volume = {214},
number = {15},
pages = {1749--1755},
url = {http://dx.doi.org/10.1002/macp.201300282}
}
|
|||||
| Yang, H., Mayne, A.J., Comtet, G., Dujardin, G., Kuk, Y., Sonnet, P., Stauffer, L., Nagarajan, S. and Gourdon, A. | STM imaging, spectroscopy and manipulation of a self-assembled PTCDI monolayer on epitaxial graphene | 2013 | Physical Chemistry Chemical Physics Vol. 15(14), pp. 4939-4946 |
article | DOI |
| Abstract: Scanning Tunneling Microscopy (STM), Scanning Tunneling Spectroscopy (STS), and manipulation studies were performed on an ordered self-assembled monolayer (SAM) of N,N'-bis(1-hexylheptyl)perylene-3,4: 9,10-bis(dicarboximide) molecules on epitaxial graphene on hexagonal silicon carbide - SiC(0001). Four novel aspects of the molecular SAM on graphene are presented. Molecules adsorb in both armchair and zig-zag configurations, giving rise to six orientations of the molecular layer with respect to the underlying substrate. The interaction between the molecules and the graphene surface shifts the LUMO towards the Fermi level, inducing a charge transfer and the opening of a band gap in the graphene, with the LUMO inside. This decouples the LUMO from the surface rendering it invisible in the dI/dV spectroscopy. The HOMO only becomes visible at short tip-surface distances, as its energy lies within the band gap of the SiC substrate. Finally, the observed molecular defects are very particular, being composed exclusively of molecular dimers. These molecular dimers have a stronger interaction with the graphene than other molecules. | |||||
BibTeX:
@article{Yang2013,
author = {Yang, H. and Mayne, A. J. and Comtet, G. and Dujardin, G. and Kuk, Y. and Sonnet, P. and Stauffer, L. and Nagarajan, S. and Gourdon, A.},
title = {STM imaging, spectroscopy and manipulation of a self-assembled PTCDI monolayer on epitaxial graphene},
journal = {Physical Chemistry Chemical Physics},
year = {2013},
volume = {15},
number = {14},
pages = {4939--4946},
doi = {http://doi.org/10.1039/c3cp42591f}
}
|
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| Yatsui, T., Nomura, W., Stehlin, F., Soppera, O., Naruse, M. and Ohtsu, M. | Challenges in realizing ultraflat materials surfaces | 2013 | Vol. 4(1)Beilstein Journal of Nanotechnology, pp. 875-885 |
article | URL |
| Abstract: Ultraflat surface substrates are required to achieve an optimal performance of future optical, electronic, or optoelectronic devices for various applications, because such surfaces reduce the scattering loss of photons, electrons, or both at the surfaces and interfaces. In this paper, we review recent progress toward the realization of ultraflat materials surfaces. First, we review the development of surface-flattening techniques. Second, we briefly review the dressed photon-phonon (DPP), a nanometric quasiparticle that describes the coupled state of a photon, an electron, and a multimode-coherent phonon. Then, we review several recent developments based on DPP-photochemical etching and desorption processes, which have resulted in angstrom-scale flat surfaces. To confirm that the superior flatness of these surfaces that originated from the DPP process, we also review a simplified mathematical model that describes the scale-dependent effects of optical near-fields. Finally, we present the future outlook for these technologies. © 2013 Yatsui et al. | |||||
BibTeX:
@article{Yatsui2013,
author = {Yatsui, T. and Nomura, W. and Stehlin, F. and Soppera, O. and Naruse, M. and Ohtsu, M.},
title = {Challenges in realizing ultraflat materials surfaces},
booktitle = {Beilstein Journal of Nanotechnology},
year = {2013},
volume = {4},
number = {1},
pages = {875--885},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894031421&doi=10.3762%2fbjnano.4.99&partnerID=40&md5=888fe8914c4b0a22d18ce00910d6c1d8}
}
|
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| Yuan, Z., Sonnet, P., Hanf, M.C., Stephan, R., Dulot, F. and Wetzel, P. | Structural and electronic properties of the Co-induced Si(111) root 13 x root 13-R13.9 degrees surface reconstruction | 2013 | Surface Science Vol. 607, pp. 111-117 |
article | DOI |
| Abstract: Scanning Tunneling Microscopy (STM) observations of the Si(111) root 13 x root 13-R13.9 degrees-Co surface reconstruction show that two types of clusters coexist on the surface appearing as dark and bright on the images. The atomic structure of the dark ones has been recently proposed by L. Chaput et al. (L. Chaput, F. Dulot, M. C. Hanf, P. Wetzel, Surf. Sci. 604 (2010) 513) [34]. We found that each dark cluster consists of three Co atoms located on substitutional sites of the Si(111) surface with an overlying triangle of six Si adatoms. Here, we present the determination of the bright clusters atomic structure. Combining high-resolution filled and empty-state STM images and DFT simulations, we show that bright clusters consist of additional Si adatoms located on top of the six Si atoms terminating the dark clusters. These Si adatoms are in number of one, two or three. Energy stability of these three configurations and description of the electronic states are discussed in detail. (c) 2012 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Yuan2013,
author = {Yuan, Z. and Sonnet, P. and Hanf, M. C. and Stephan, R. and Dulot, F. and Wetzel, P.},
title = {Structural and electronic properties of the Co-induced Si(111) root 13 x root 13-R13.9 degrees surface reconstruction},
journal = {Surface Science},
year = {2013},
volume = {607},
pages = {111--117},
doi = {http://doi.org/10.1016/j.susc.2012.07.041}
}
|
|||||
| Zhang, F., Rio, M., Allais, R., Zwolinski, P., Carrillo, T.R., Roucoules, L., Mercier-Laurent, E. and Buclet, N. | Toward an systemic navigation framework to integrate sustainable development into the company | 2013 | Journal of Cleaner Production Vol. 54(0), pp. 199-214 |
article | URL |
| Abstract: Abstract In a very uncertain and competitive economy, companies have to cope with external constraints such as environmental and social issues, to gain competitive advantage. Over the last thirty years, numerous initiatives have appeared to deal with socio-environmental issues. However, contexts are complex and dynamics. Many authors therefore point out the need to establish a systemic perspective in order to improve the integration of sustainable issues into all company activities: from strategic decision-making to the end of the project. In addition, companies need to reinforce the relationship between general corporate development and eco-design activities. Based on literature review, this paper assumes that the integration of sustainability can be improved by developing a coherent and system approach between strategic, tactical and operational levels. The authors have chosen to demonstrate this assumption by targeting the environmental aspect of sustainability as a first step of their overall research. | |||||
BibTeX:
@article{Zhang2013,
author = {Zhang, Feng and Rio, Maud and Allais, Romain and Zwolinski, Peggy and Carrillo, Tatiana Reyes and Roucoules, Lionel and Mercier-Laurent, Eunika and Buclet, Nicolas},
title = {Toward an systemic navigation framework to integrate sustainable development into the company},
journal = {Journal of Cleaner Production},
year = {2013},
volume = {54},
number = {0},
pages = {199--214},
url = {http://www.sciencedirect.com/science/article/pii/S0959652613002825}
}
|
|||||
| Zhang, H., Li, L., Möller, M., Zhu, X., Rueda, J., Rosenthal, M. and Ivanov, D. | From channel-forming ionic liquid crystals exhibiting humidity-induced phase transitions to nanostructured ion-conducting polymer membranes | 2013 | Vol. 25(26)Advanced Materials, pp. 3543-3548 |
article | URL |
| Abstract: A novel wedge-shaped amphiphilic molecule bearing a sulfonate group at the tip displays humidity-induced phase transitions from a hexagonal columnar structure to a bicontinuous cubic phase. The mesophases can be frozen by photopolymerization of acrylic end-groups resulting in free-standing membranes with different topology of ionic nanochannels. The obtained membranes with a well-ordered ionic channel structure hold promise for applications in separation and catalysis. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | |||||
BibTeX:
@article{Zhang2013a,
author = {Zhang, H. and Li, L. and Möller, M. and Zhu, X. and Rueda, J.J.H. and Rosenthal, M. and Ivanov, D.A.},
title = {From channel-forming ionic liquid crystals exhibiting humidity-induced phase transitions to nanostructured ion-conducting polymer membranes},
booktitle = {Advanced Materials},
year = {2013},
volume = {25},
number = {26},
pages = {3543--3548},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879946199&doi=10.1002%2fadma.201205097&partnerID=40&md5=27d763f041ef105cbab01b833b60ef15}
}
|
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| Zhao, T., Zheng, Y., Poly, J. and Wang, W. | Controlled multi-vinyl monomer homopolymerization through vinyl oligomer combination as a universal approach to hyperbranched architectures | 2013 | Vol. 4Nature Communications, pp. - |
article | URL |
| Abstract: The three-dimensional structures of hyperbranched materials have made them attractive in many important applications. However, the preparation of hyperbranched materials remains challenging. The hyperbranched materials from addition polymerization have gained attention, but are still confined to only a low level of branching and often low yield. Moreover, the complication of synthesis only allows a few specialized monomers and inimers to be used. Here we report a 'Vinyl Oligomer Combination' strategy; a versatile approach that overcomes these difficulties and allows facile synthesis of highly branched polymeric materials from readily available multi-vinyl monomers, which have long been considered as formidable starting materials in addition polymerization. We report the alteration of the growth manner of polymerization by controlling the kinetic chain length, together with the manipulation of chain growth conditions, to achieve veritable hyperbranched materials, which possess nearly 70% branch ratios as well as numerous vinyl functional groups. © 2013 Macmillan Publishers Limited. All rights reserved. | |||||
BibTeX:
@article{Zhao2013,
author = {Zhao, T. and Zheng, Y. and Poly, J. and Wang, W.},
title = {Controlled multi-vinyl monomer homopolymerization through vinyl oligomer combination as a universal approach to hyperbranched architectures},
booktitle = {Nature Communications},
year = {2013},
volume = {4},
pages = {--},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878686069&doi=10.1038%2fncomms2887&partnerID=40&md5=8599ffdc26c6846a8f1f9d1966bd15cf}
}
|
|||||
| Zhao, T.Y., Zheng, Y., Poly, J. and Wang, W.X. | Controlled multi-vinyl monomer homopolymerization through vinyl oligomer combination as a universal approach to hyperbranched architectures | 2013 | Nature Communications Vol. 4, pp. 1873 |
article | DOI |
| Abstract: The three-dimensional structures of hyperbranched materials have made them attractive in many important applications. However, the preparation of hyperbranched materials remains challenging. The hyperbranched materials from addition polymerization have gained attention, but are still confined to only a low level of branching and often low yield. Moreover, the complication of synthesis only allows a few specialized monomers and inimers to be used. Here we report a 'Vinyl Oligomer Combination' strategy; a versatile approach that overcomes these difficulties and allows facile synthesis of highly branched polymeric materials from readily available multi-vinyl monomers, which have long been considered as formidable starting materials in addition polymerization. We report the alteration of the growth manner of polymerization by controlling the kinetic chain length, together with the manipulation of chain growth conditions, to achieve veritable hyperbranched materials, which possess nearly 70% branch ratios as well as numerous vinyl functional groups. | |||||
BibTeX:
@article{Zhao2013a,
author = {Zhao, T. Y. and Zheng, Y. and Poly, J. and Wang, W. X.},
title = {Controlled multi-vinyl monomer homopolymerization through vinyl oligomer combination as a universal approach to hyperbranched architectures},
journal = {Nature Communications},
year = {2013},
volume = {4},
pages = {1873},
doi = {http://doi.org/10.1038/ncomms2887}
}
|
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| Zheng, Y., Zhao, T.Y., Newland, B., Poly, J. and Wang, W.X. | Controlled homopolymerization of multi-vinyl monomers: dendritic polymers synthesized via an optimized ATRA reaction | 2013 | Chemical Communications Vol. 49(86), pp. 10124-10126 |
article | DOI |
| Abstract: In this study, we have managed to find the optimal ATRA system that can obtain the highest mono-adduct yields with the purpose of minimizing the chain growth of divinyl monomers. The most highly hyperbranched polymers have been synthesized by the homopolymerization of multi-vinyl monomers via ATRA reaction. | |||||
BibTeX:
@article{Zheng2013a,
author = {Zheng, Y. and Zhao, T. Y. and Newland, B. and Poly, J. and Wang, W. X.},
title = {Controlled homopolymerization of multi-vinyl monomers: dendritic polymers synthesized via an optimized ATRA reaction},
journal = {Chemical Communications},
year = {2013},
volume = {49},
number = {86},
pages = {10124--10126},
doi = {http://doi.org/10.1039/c3cc44898c}
}
|
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| Zlotea, C., Cuevas, F., Andrieux, J., Ghimbeu Camelia Matei, C., Leroy, E., Léonel, E., Sengmany, S., Vix-Guterl, C., Gadiou, R., Martens, T. and Latroche, M. | Tunable synthesis of (Mg-Ni)-based hydrides nanoconfined in templated carbon studied by in situ synchrotron diffraction | 2013 | Nano Energy Vol. 2(1), pp. 12-20 |
article | URL |
| Abstract: The formation of ultra-small Mg-based particles nanoconfined into the mesopores of a carbon template was studied by in situ synchrotron diffraction. Either Mg2Ni or Mg2NiH4 nanoparticles can be directly formed starting from separate Ni and MgH2 nano-species by tuning the H2 pressure and temperature. Both ultra-small Mg2Ni and Mg2NiH4 nanoparticles (∼4 nm) are extremely stable against coalescence during hydrogen sorption cycling and prolonged exposure to high temperature as compared to Mg and MgH2 nanoparticles that show severe coalescence under same experimental conditions. The structural transition reported in bulk Mg2NiH4 from high temperature cubic to low temperature monoclinic structure is no longer observed for the nanoconfined particles. Hydrogen absorption/desorption in nanosized Mg2Ni is reversible and sorption kinetics proceed very quickly (∼5 min) even at 483 K. On the contrary, the thermodynamics properties are not altered by nanoconfinement. This study opens new routes for successful nanoconfinement of stoichiometric hydrides into the pores of carbon hosts along with a better understanding of the underlying nanochemistry. | |||||
BibTeX:
@article{Zlotea2013,
author = {Zlotea, Claudia and Cuevas, Fermin and Andrieux, Jérôme and Ghimbeu, Camelia Matei, Camelia and Leroy, Eric and Léonel, Eric and Sengmany, Stéphane and Vix-Guterl, Cathie and Gadiou, Roger and Martens, Thierry and Latroche, Michel},
title = {Tunable synthesis of (Mg-Ni)-based hydrides nanoconfined in templated carbon studied by in situ synchrotron diffraction},
journal = {Nano Energy},
year = {2013},
volume = {2},
number = {1},
pages = {12--20},
url = {http://www.sciencedirect.com/science/article/pii/S2211285512001450}
}
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