Accueil » Les axes thématiques » I2M Interfaces et Matériaux Multidimensionnels » I2M Interfaces et Matériaux Multidimensionnels Theme 3

Wetting and assembly of nano-microparticles

​Wetting and assembly of nano-microparticles

Laurent Vonna   laurent.vonna@uha.fr

Wetting of Textured Substrates

  • Control of wettability : Demonstrated ability to control the wettability of surfaces through surface texturing, utilizing techniques such as femtosecond laser processing.
  • Contact angle hysteresis and droplet behavior : Investigated the relationship between surface texture and contact angle hysteresis, droplet pinning, and faceting.
  • Wilhelmy plate tensiometry : Employed the Wilhelmy plate technique to characterize the wetting properties of highly liquid-repellent surfaces and measure triple-line anchoring forces.
  • Bacterial adhesion : Studied the influence of surface wettability on bacterial adhesion, identifying the role of air trapping and surface texture.

Assembly and Stability of Nano- and Microparticle Assemblies

  • Growth modes of metal coatings : Investigated the growth mechanisms of metal nanoparticles on elastomer substrates, such as polydimethylsiloxane (PDMS), and the influence of substrate properties on coating morphology.
  • Particle-based coatings : Developed and characterized particle-based coatings for various applications, controlling their morphology, stability, and functional properties.
  • Self-assembly : Utilized self-assembly techniques to create ordered structures from nanoparticles and microparticles, investigating the factors influencing their formation and stability.

Properties of Elastomers

  • Adhesion properties : Studied the adhesion properties of elastomers, focusing on contact formation between soft elastic hemispheres and micropatterned substrates.
  • Growth of metal coatings : Investigated the growth mechanisms of metal nanoparticles on elastomer substrates, including the influence of substrate properties and deposition conditions.
  • Cross-linking density : Determined the cross-linking density of elastomers using swelling experiments and mechanical testing, relating it to their macroscopic behavior and mechanical properties.
  • Adhesive properties : Explored the adhesive properties of elastomers, including their ability to adhere to various surfaces and withstand mechanical stress.
  • Wetting properties : Investigated the wetting properties of elastomers, including their ability to repel or retain liquids, and the influence of surface texture and chemical composition.
  • Texturing : Developed methods for texturing elastomers using femtosecond laser processing, controlling their wettability, bacterial adhesion, and other properties.