Non-equilibrium sedimentation of colloids on the particle scale

Details Non-equilibrium sedimentation of colloids on the particle scale Non-equilibrium sedimentation of colloids on the particle scale

2007-03-30

arxiv.org/abs/cond-mat/0703808v1

Physics

Condensed Matter

Soft Condensed Matter

to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.98.188304

We investigate sedimentation of model hard sphere-like colloidal dispersions confined in horizontal capillaries using laser scanning confocal microscopy, dynamical density functional theory, and Brownian dynamics computer simulations. For homogenized initial states we obtain quantitative agreement of the results from the respective approaches for the time evolution of the one-body density distribution and the osmotic pressure on the walls. We demonstrate that single particle information can be obtained experimentally in systems that were initialized further out-of-equilibrium such that complex lateral patterns form.

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