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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Poster: Colloids and Complex Liquids

CPP 38.18: Poster

Mittwoch, 16. März 2011, 17:00–19:00, P2

Confined Binary Colloidal Crystals in 2D: Monte Carlo Simulation of Crack Formation — •Stefan Medina Hernando, Peter Virnau, and Kurt Binder — Institut für Physik, Uni Mainz, Germany

As recent studies have shown, the confinement of a two-dimensional strip of a binary (A,B) colloidal mixture by walls in one direction may either stabilize or destabilize the crystalline structure depending on the type of wall. However, an introduction of misfit, i.e. a reduction of space between the walls, leads to the appearance of grain boundaries in both cases. These crack patterns typically have a width of several particle diameters and, depending on the extent of the misfit, are spread over the colloidal strip. Large misfits may even drive the system into a glassy state. We also present various methods to characterize order and disorder in such systems.