PMID: 11308636Apr 20, 2001Paper

Wetting of a symmetrical binary fluid mixture on a wall

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
F Schmid, Nigel B Wilding

Abstract

We study the wetting behavior of a symmetrical binary fluid below the demixing temperature at a nonselective attractive wall. Although it demixes in the bulk, a sufficiently thin liquid film remains mixed. On approaching liquid vapor coexistence, however, the thickness of the liquid film increases and it may demix and then wet the substrate. We show that the wetting properties are determined by an interplay of the two length scales related to the density and the composition fluctuations. The problem is analyzed within the framework of a generic two component Ginzburg-Landau functional (appropriate for systems with short-ranged interactions). This functional is minimized both numerically and analytically within a piecewise parabolic potential approximation. A number of surface transitions are found, including first-order demixing and prewetting, continuous demixing, a tricritical point connecting the two regimes, or a critical end point beyond which the prewetting line separates a strongly and a weakly demixed film. Our results are supported by detailed Monte Carlo simulations of a symmetrical binary Lennard-Jones fluid at an attractive wall.

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Citations

Aug 21, 2013·The Journal of Chemical Physics·Vaibhaw Kumar, Jeffrey R Errington
Jul 5, 2013·The Journal of Chemical Physics·S Materniak, A Patrykiejew
Mar 22, 2018·Physical Chemistry Chemical Physics : PCCP·A Patrykiejew
Aug 16, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tapas R Kunor, Srabani Taraphder
Apr 20, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jörg R SilbermannMartin Schoen
Oct 26, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·A PatrykiejewO Pizio

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