Dresden 2011 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Poster: Colloids and Complex Liquids

CPP 38.23: Poster

Wednesday, March 16, 2011, 17:00–19:00, P2

Percolation transition of colloids with short-ranged attraction in a slit-pore geometry. — •Helge Neitsch and Sabine H. L. Klapp — Institut für Theoretische Physik, TU Berlin, Hardenbergstraße 36, D-10623 Berlin, Germany

We have performed event-driven molecular dynamic (EDMD) simulations of a system consisting of colloidal particles with ultra-short ranged attractive interactions which are confined by two smooth, parallel walls. The pair-wise interaction between the particles is modeled using a square-well potential with an attraction length of 4% of the particle diameter. In the present system we investigate structural and dynamical properties via quantities like cluster-mass distributions and mean square displacements for the bulk and the confined system using wall distances down to two particle diameters. Above the metastable liquid-liquid spinodal, which has been estimated for the bulk system and all given wall distances, a percolation transition has been found even in the case with the lowest wall distance.