Volume 60, Number 1, October 2002
|Page(s)||99 - 105|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Investigation of effective interface potentials by electrowetting
Laboratoire de Spectrométrie
Physique (Unité mixte de recherche CNRS (n°5588) & Université Joseph
Fourier Grenoble 1.) , BP 87 38402 St. Martin
d'Hères Cedex, France
2 Laboratoire de Physique de l'ENSL (Unité mixte de recherche CNRS (n°5672) & Ecole Normale Supérieure de Lyon.) 46 allée d'Italie, 69364 Lyon Cedex 07, France
Accepted: 10 July 2002
We study a situation where the complete wetting of a dielectric solid by a dielectric liquid, in a conducting surrounding, is altered by the application of an electrical potential difference. Calculations predict a dewetting transition towards pseudo-partial wetting. More generally, in a pseudo-partial wetting situation (pre-existing or electrically induced), the mesoscopic film coexisting with the macroscopic droplet is expected to be thinned by the electrostatic pressure in a way that is directly related to its effective interface potential. This points out a possibility to tune the thickness of a fluid film in a nanometric regime.
PACS: 68.08.Bc – Wetting / 68.15.+e – Liquid thin films / 83.60.Np – Effects of electric and magnetic fields
© EDP Sciences, 2002
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