Volume 74, Number 2, April 2006
|Page(s)||306 - 312|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||22 March 2006|
Bouncing transitions on microtextured materials
Laboratoire de Physique de la Matière Condensée, FRE 2844 du CNRS Collège de France - 75231 Paris Cedex 05, France
2 Laboratoire de Photonique et Nanostructures (LPN) - Route de Nozay 91460 Marcoussis, France
3 Groupe ESIEE, SMM, Cité Descartes - BP 99, 93162 Noisy le Grand, France
4 Ecole Normale Supérieure - 24 rue Lhomond, 75231 Paris Cedex 05, France
Accepted: 14 February 2006
A drop of water thrown on a super-hydrophobic solid will often bounce off. Here we discuss the conditions to be fulfilled on the surface design (which provides super-hydrophobicity) to observe such a behavior. This allows us to precise how a material can be made water-repellent. We show in particular how the reduction of the scale of the microstructure provides a robust water repellency, and describe some peculiarities of violent shocks on such surfaces.
PACS: 68.08.Bc – Wetting / 68.03.-g – Gas-liquid and vacuum-liquid interfaces / 68.08.-p – Liquid-solid interfaces
© EDP Sciences, 2006
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