Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 36: Wetting, Micro and nanofluidics I

CPP 36.11: Talk

Thursday, March 29, 2012, 18:00–18:15, C 264

Wetting and prewetting in electrolyte solutions — •Ingrid Ibagon, Markus Bier, and S. Dietrich — Max-Planck-Institut IS, Stuttgart, Germany

We investigate the wetting of a charged substrate by an electrolyte solution by means of classical density functional theory applied to a lattice model for an ionic fluid. Our lattice model consists of three species (solvent, anions and cations) that occupy the sites of a uniform lattice filling the half-space z>0. The three species have an attractive nearest-neighbor interaction. Moreover ions interact via Coulomb force and all three species interact with the substrate via an attractive external potential. The surface charge density and the ionic concentration are found to have an impact on the wetting behavior, in particular the influence on the wetting temperature and the prewetting transition are studied.