Regensburg 2010 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 21: Soft Matter II

DY 21.3: Vortrag

Mittwoch, 24. März 2010, 17:00–17:15, H47

Manipulation of colloidal crystal structures by confinement — •Andrea Fortini and Matthias Schmidt — Theoretische Physik II, Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany

We study the phase behavior of hard-sphere colloidal particles confined between impenetrable walls using extensive Monte Carlo computer simulations. We extend the results of our previous studies [Schmidt and Löwen. Phys. Rev. Lett. 1996, 4552 , Fortini and Dijkstra. J. Phys.: Condens. Matter, 2006 L371] by considering more complex and experimentally relevant confinement geometries. We find a sequence of non closed-packed equilibrium structures that depends on the hard spheres packing fraction and the degree of confinement. We discuss the stability phase diagram of the different phases and the experimental realization of the model.