First-order layering and critical wetting transitions in non-additive hard sphere mixtures

Details First-order layering and critical wetting transitions in non-additive hard sphere mixtures First-order layering and critical wetting transitions in non-additive hard sphere mixtures

2011-05-09

arxiv.org/abs/1105.1618v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

Using fundamental-measure density functional theory we investigate entropic wetting in an asymmetric binary mixture of hard spheres with positive non-additivity. We consider a general planar hard wall, where preferential adsorption is induced by a difference in closest approach of the different species and the wall. Close to bulk fluid-fluid coexistence the phase rich in the minority component adsorbs either through a series of first-order layering transitions, where an increasing number of liquid layers adsorbs sequentially, or via a critical wetting transition, where a thick film grows continuously.

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