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