Tuesday, May 7, 2013

1305.1253 (Daniela J. Kraft et al.)

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

Daniela J. Kraft, Raphael Wittkowski, Borge ten Hagen, Kazem V. Edmond, David J. Pine, Hartmut Löwen
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.
View original: http://arxiv.org/abs/1305.1253

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