Another main thrust of research in the group is concerned with microscopic models of active systems such as Janus particles that behave as synthetic motors that catalyze the conversion of fuel and thereby propel themselves in solution by self- diffusiophoresis. In this mechanism the concentration gradient generated by asymmetric catalytic activity leads to a force on the motor that induces fluid flows in the surrounding medium. Such active media, whose constituents are able to move autonomously, display novel features that differ from those of equilibrium systems. In collaboration with Ray Kapral and his group members, our group is working on methods of simulating and characterizing cooperative motion in active systems such as flocking using microscopic models. Theoretical work is focussed on deriving evolution equations for the coarse grained dynamics of the system from first principles, and using generalizations of local equilibrium ensembles to describe correlations and fluctuations in steady state and non-equilibrium systems.

Relevant publications

This page is maintained by
Created September 15, 1997. Last updated September, 2016.