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Dynamical States in Driven Colloidal Liquid Crystals
Dynamical State: TowingThe driving of liquid crystals by external potentials is a common phenomenon in many industrial applications as well as biological systems. Due to the complexity of such systems it is an established approach to study them by computer simulation.
We examine a model colloidal liquid crystal consisting of hard
spherocylinders as the arguably simplest model system for rod-like
colloidal liquid crystals under the influence of an external aligning
potential by Langevin dynamics simulation. The external field rotates in
a plane and acts on the orientation of the individual particles. We
observe a variety of collective nonequilibrium states which we
characterize by the time-resolved orientational distribution of the
particles. With our simulation method, we are able to explain the origin
of these states via the single particle behavior. By varying the
external driving frequency and the packing fraction of the
spherocylinders we construct the dynamical state diagram.
J. Chem. Phys. 141, 194903 (2014);
[Suppl. Material]
Ellen, 2014-11-17
