Volume 47, Number 4, August II 1999
|Page(s)||474 - 480|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Morphological phase transitions of thin fluid films on chemically structured substrates
Fachbereich Physik, Bergische Universität Wuppertal D-42097 Wuppertal, Germany
2 Department of Mathematics, Imperial College 180 Queen's Gate, London SW7 2BZ, UK
Accepted: 28 June 1999
Using an interface displacement model derived from a microscopic density functional theory we investigate thin liquid-like wetting layers adsorbed on flat substrates with an embedded chemical heterogeneity forming a stripe. For a wide range of effective interface potentials we find first-order phase transitions as well as continuous changes between lateral interfacial configurations bound to and repelled from the stripe area. We determine phase diagrams and discuss the conditions under which these morphological changes arise.
PACS: 68.10.-m – Fluid surfaces and fluid-fluid interfaces / 82.65.Dp – Thermodynamics of surfaces and interfaces / 68.45.Gd – Wetting
© EDP Sciences, 1999
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