Wednesday, February 18, 2009, 11:00 am — Bldg. 735 - Conf Rm B
Complex fluids such as colloidal suspensions and polymer melts exhibit slow dynamics under a variety of conditions. Glasses are self-constraining complex fluids in which each particle is confined by its neighbors, and their dynamics as observed by simulation and experiment include a number of non-Gaussian behaviors. A theory of glassy dynamics in dense colloidal suspensions is presented, which qualitatively predicts the anomalous phenomenology. Another system exhibiting constrained dynamics is a polymer chain under spatial confinement, as in a porous medium. Simplified simulations of polymers under generic heterogeneous confinement are presented, which show that this system exhibits many of the non-Gaussian features of glassy dynamics.
Hosted by: Mark Hybertsen
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