Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Poster: Colloids and Complex Liquids

CPP 16.41: Poster

Dienstag, 27. März 2012, 18:15–20:45, Poster A

On a field-induced vapor-liquid phase transition in dipolar monolayers — •Sebastian Jäger, Heiko Schmidle, and Sabine H. L. Klapp — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We investigate suspensions of colloidal dipolar particles in quasi-two-dimensional systems that are exposed to external rotating fields. If the fields rotate within the plane of the dipolar monolayer and are of suitable strength and frequency [1], they can cause the particles to self-assemble into two dimensional aggregates. In this talk, we relate the cluster aggregation process to a vapor-liquid phase transition and investigate the dynamic behavior of the dipolar particles when exposed to the rotating fields. To do this, we make use of Brownian (Langevin) dynamics simulations (with and without hydrodynamic interactions) and Monte-Carlo simulations [2, 3].

[1] S. Jäger and S. H. L. Klapp, Soft Matter 7, 6606 (2011).

[2] H. Schmidle and S. H. L. Klapp, J. Chem. Phys. 134, 114903 (2011).

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