Dresden 2011 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 45: Colloids and Complex Liquids III - External Fields

CPP 45.1: Talk

Thursday, March 17, 2011, 17:15–17:30, ZEU 114

Structure formation and dynamics of dipolar colloids in rotating fields — •Sebastian Jäger and Sabine H. L. Klapp — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We investigate suspensions of colloidal dipolar particles that are exposed to external rotating fields. Given suitable system parameters these systems form layered structures. We are mainly interested in the dynamics of the colloidal particles and the question for which field strengths and frequencies layer formation occurs. To explore these matters, we employ computer simulations, most notably Brownian (Langevin) dynamics simulations, which we supplement by semi-analytical considerations. In particular, we propose a simple theory that describes layer formation in a density functional framework [1].

[1] S. Jäger and S. H. L. Klapp, in preparation.