Volume 74, Number 2, April 2006
|Page(s)||299 - 305|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||15 March 2006|
Bouncing or sticky droplets: Impalement transitions on superhydrophobic micropatterned surfaces
Laboratoire de Physique Statistique de l'ENS, CNRS, UMR 8550 associée aux Universités Paris 6 et Paris 7 - 24 rue Lhomond, 75231 Paris Cédex 05, France
2 Laboratoire de Physico-Chimie Curie, Institut Curie, CNRS, UMR 168 26 rue d'Ulm, 75248 Paris Cédex, France
Corresponding authors: email@example.com firstname.lastname@example.org
Accepted: 14 February 2006
When a liquid drop impinges a hydrophobic rough surface it can either bounce off the surface (fakir droplets) or be impaled and strongly stuck on it (Wenzel droplets). The analysis of drop impact and quasi-static “loading” experiments on model microfabricated surfaces allows to clearly identify the forces hindering the impalement transitions. A simple semi-quantitative model is proposed to account for the observed relation between the surface topography and the robustness of fakir non-wetting states. Motivated by potential applications in microfluidics and in the fabrication of self-cleaning surfaces, we finally propose some guidelines to design robust superhydrophobic surfaces.
PACS: 68.08.Bc – Wetting / 68.03.Cd – Surface tension and related phenomena / 47.55.D- – Drops and bubbles
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.