Volume 62, Number 6, June 2003
|Page(s)||815 - 821|
|Published online||01 June 2003|
Wetting at curved substrates: Non-analytic behavior of interfacial properties
H. H. Wills Physics Laboratory, University of Bristol - Bristol BS8 1TL, UK
2 Max-Planck-Institut für Metallforschung - Heisenbergstr. 3 70569 Stuttgart, Germany
3 ITAP, Universität Stuttgart - Pfaffenwaldring 57, 70569 Stuttgart, Germany
4 Department of Modeling of Physico-Chemical Processes, MCS University Lublin 20-031, Poland
Accepted: 28 April 2003
We argue that for complete wetting at a curved substrate (wall) the wall-fluid surface tension is non-analytic in , the curvature of the wall, and that the density profile of the fluid near the wall acquires a contribution proportional to the gas-liquid surface tension plus higher-order contributions which are non-analytic in . These predictions are confirmed by results of density functional calculations for the square-well model of a liquid adsorbed on a hard sphere and on a hard cylinder where complete wetting by gas (drying) occurs. The implications of our results for the solvation of big solvophobic particles are discussed.
PACS: 05.70.Np – Interface and surface thermodynamics / 68.08.Bc – Wetting
© EDP Sciences, 2003
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