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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 47: Charged Soft Matter

CPP 47.9: Talk

Friday, March 15, 2013, 11:45–12:00, H34

Why ions promote first-order wetting — •Ingrid Ibagon, Markus Bier, and S. Dietrich — Max-Planck-Institut für Intelligente Systeme, Stuttgart, Germany

Wetting studies of electrolyte solutions have shown that electrostatic interactions promote first order wetting transitions [1,2,3]. In this work we present an analytic expression of the effective interface potential within a model for an electrolyte solution near a charged wall, which is derived from an expansion of the density functional around a sharp kink density profile [4]. The analysis enables us to draw an intuitive picture of the conditions under which the presence of ions will promote first-order wetting.

[1] N. A. Denesyuk and J.-P. Hansen, J. Chem. Phys. 121, 3613 (2004).

[2] A. Oleksy and J.-P. Hansen, Mol. Phys. 107, 2609 (2009).

[3] I. Ibagon, M. Bier, and S. Dietrich, in preparation.

[4] I. Ibagon, M. Bier, and S. Dietrich, in preparation.