Wetting films on chemically heterogeneous substrates

Details Wetting films on chemically heterogeneous substrates Wetting films on chemically heterogeneous substrates

1999-06-11

arxiv.org/abs/cond-mat/9906168v1

Physics

Condensed Matter

Soft Condensed Matter

56 pages, RevTeX, 20 Figures

Scientific paper

10.1103/PhysRevE.60.6919

Based on a microscopic density functional theory we investigate the morphology of thin liquidlike wetting films adsorbed on substrates endowed with well-defined chemical heterogeneities. As paradigmatic cases we focus on a single chemical step and on a single stripe. In view of applications in microfluidics the accuracy of guiding liquids by chemical microchannels is discussed. Finally we give a general prescription of how to investigate theoretically the wetting properties of substrates with arbitrary chemical structures.

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