Rhythmic cluster generation in strongly driven colloidal dispersions

Details Rhythmic cluster generation in strongly driven colloidal dispersions Rhythmic cluster generation in strongly driven colloidal dispersions

2006-06-28

arxiv.org/abs/cond-mat/0606738v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.038303

We study the response of a nematic colloidal dispersion of rods to a driven probe particle which is dragged with high speed through the dispersion perpendicular to the nematic director. In front of the dragged particle, clusters of rods are generated which rhythmically grow and dissolve by rotational motion. We find evidence for a mesoscopic cluster-cluster correlation length, {\em independent} of the imposed drag speed. Our results are based on non-equilibrium Brownian dynamics computer simulations and in line with a dynamical scaling theory.

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