Brownian motion and the hydrodynamic friction tensor for colloidal particles of complex shape

摘要

We synthesize colloidal particles with various anisotropic shapes and track their orientationally resolved Brownianntrajectories using confocal microscopy. An analysis of appropriate short-time correlation functions providesndirect access to the hydrodynamic friction tensor of the particles revealing nontrivial couplings between thentranslational and rotational degrees of freedom. The results are consistent with calculations of the hydrodynamicnfriction tensor in the low-Reynolds-number regime for the experimentally determined particle shapes.