395 citations · 584 across the 17 of their papers we have counts for
19 papers
The hidden side of paintbrushes: a geometry shaped by power laws
Raphaelle Taub, Jérôme Crassous, Thomas Salez +2
Since prehistoric times, painters have used brush-like tools made from animal and plant materials to apply pigments to rock surfaces. Over time, techniques for creating brushes evo…
Thickness of epithelia on wavy substrates: measurements and continuous models
Nicolas Harmand, Julien Dervaux, Christophe Poulard +1
We measured the thickness of MDCK epithelia grown on substrates with a sinusoidal profile. We show that while at long wavelength the profile of the epithelium follows that of the s…
Debonding of a soft adhesive fibril in contact with an elastomeric pillar
Aymeric Duigou-Majumdar, Pierre-Philippe Cortet, Christophe Poulard
The debonding criterion of fibrils of soft adhesive materials is a key element regarding the quantitative modelisation of pressure sensitive adhesive tapes peeling energy. We prese…
Evaporation of liquid coating a fiber
Marie Corpart, Julien Dervaux, Christophe Poulard +2
We investigate theoretically and numerically the diffusion-limited evaporation of a liquid deposited on a fiber in two configurations: a sleeve and a axisymmetric barrel-shaped dro…
Effect of the density of pillar-patterned substrates on the contact mechanics: Transition from top to mixed contact with a detailed pressure-field description
Rene Ledesma-Alonso, Elie Raphael, Frederic Restagno +1
Different contact regimes between a spherical lens and a periodically patterned substrate are observed, when they are pressed against each other. Top contact occurs when only the h…
Nonlinear amplification of adhesion forces in interleaved books
Raphaelle Taub, Thomas Salez, Hector Alarcon +3
Two interleaved phonebooks are nearly impossible to separate by pulling their spines. The very slight force exerted by the outer sheets of the assembly is amplified as the exponent…
Skinny emulsions take on granular matter
Anaïs Giustiniani, Simon Weis, Christophe Poulard +4
Our understanding of the structural features of foams and emulsions has advanced significantly over the last 20 years. However, with a search for "super-stable" liquid dispersions,…
Water-based peeling of thin hydrophobic films
Sepideh Khodaparast, François Boulogne, Christophe Poulard +1
Inks of permanent markers and water-proof cosmetics create elastic thin films upon application on a surface. Such adhesive materials are deliberately designed to exhibit water-repe…
Interfacial tension of reactive, liquid interfaces and its consequences
Anaïs Giustiniani, Wiebke Drenckhan, Christophe Poulard
Dispersions of immiscible liquids, such as emulsions and polymer blends, are at the core of many industrial applications which makes the understanding of their properties (morpholo…
Protocol to perform pressurized blister tests on thin elastic films
François Boulogne, Sepideh Khodaparast, Christophe Poulard +1
This work aims to identify common challenges in the preparation of the blister test devices designed for measurement of energy release rate for brittle thin films and to propose ea…
Generation of silicone poly-HIPES with controlled pore sizes via reactive emulsion stabilization
Anaïs Giustiniani, Philippe Guégan, Manon Marchand +2
Macrocellular silicone polymers are obtained after solidification of the continuous phase of a PDMS (polydimethylsiloxane) emulsion, which contains PEG (polyethylene glycol) drops…
Stress concentration in periodically rough hertzian contact: Hertz to soft-flat-punch transition
Rene Ledesma-Alonso, Elie Raphael, Liliane Leger +2
We report on the elastic contact between a spherical lens and a patterned substrate, composed of an hexagonal lattice of cylindrical pillars. The stress field and the size of the c…
Self-amplification of solid friction in interleaved assemblies
Hector Alarcon, Thomas Salez, Christophe Poulard +4
It is nearly impossible to separate two interleaved phonebooks when held by their spines. A full understanding of this astonishing demonstration of solid friction in complex assemb…
Transition from Cassie to Wenzel state in patterned soft elastomer sliding contacts
Élise Degrandi-Contraires, Christophe Poulard, Frédéric Restagno +2
In this paper, we presented an experimental and theoretical analysis of the formation of the contact between a smooth elastomer lens and an elastomer substrate micropatterned with…
Mechanical tunning of adhesion through micro-patterning of elastic surfaces
Christophe Poulard, Frédéric Restagno, Raphaël Weil +1
We present an investigation of the role of micropatterning on adhesion properties at soft deformable polydimethylsiloxane (PDMS)/ acrylic adhesive interfaces. Contrary to what has…
Multiple-length-scale elastic instability mimics parametric resonance of nonlinear oscillators
Fabian Brau, Hugues Vandeparre, Abbas Sabbah +3
Spatially confined rigid membranes reorganize their morphology in response to the imposed constraints. A crumpled elastic sheet presents a complex pattern of random folds focusing…
Slippery or sticky ! Control of wrinkling patterns by selective adhesion
Hugues Vandeparre, Julien Léopoldès, Christophe Poulard +4
Wrinkling patterns at the metallized surface of thin polymer films are shown to be sensitive to the sticky or slippery character of the polymer/substrate interface (titanium coatin…
Evaporating Drops of Alkane Mixtures
Geoffroy Guéna, Christophe Poulard, Anne-Marie Cazabat
Alkane mixtures are model systems where the influence of surface tension gradients during the spreading and the evaporation of wetting drops can be easily studied. The surface tens…
Rescaling the dynamics of evaporating drops
Christophe Poulard, Geoffroy Guéna, Anne-Marie Cazabat +2
The dynamics of evaporation of wetting droplets has been investigated experimentally in an extended range of drop sizes, in order to provide trends relevant for a theoretical analy…