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Regensburg 2010 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 4: Statistical Physics (general) II

DY 4.8: Vortrag

Montag, 22. März 2010, 15:45–16:00, H47

Effect of critical adsorption of binary solvent on distribution of ionic solute near a charged surface. — •Anna Maciolek1,2 and Alina Ciach11Max-Planck Institut fuer Metallforschung, Heisenbergstr. 3, 70569 Stuttgart — 2Institute of Physical Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland

We study near-critical binary mixtures containing ionic solutes near a charged wall preferentially adsorbing one component of the solvent. Within a Landau-Ginzburg approach extended to include electrostatic interactions and the chemical preference of ions for one component of the solvent, we find that critical adsorption changes significantly distribution of ions near the wall. This may have important implications in confining geometries, in particular, for an electrostatic interactions of colloids in a binary near-critical solvent.

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