2007/06/06 by Matthias Krüger, Markus Rauscher · 1 citation
Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Micro and Nano Robotics #Pickering emulsions and particle stabilization #cond-mat.soft
paper · pdf · doi:10.1063/1.2753481
published as J. Chem. Phys. 127, 034905 (2007) · 8 Pages, 8 figures
arxiv created 2007/06/06 · openalex publication_date 2007/07/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the nonequilibrium fluid structure mediated forces between two colloids driven through a suspension of mutually noninteracting Brownian particles as well as between a colloid and a wall in stationary situations. We solve the Smoluchowski equation in bispherical coordinates as well as with a method of reflections, both in linear approximation for small velocities and numerically for intermediate velocities, and we compare the results to a superposition approximation considered previously. In particular, we find an enhancement of the friction (compared to the friction on an isolated particle) for two colloids driven side by side as well as for a colloid traveling along a wall. The friction on tailgating colloids is reduced. Colloids traveling side-by-side experience a solute induced repulsion while tailgating colloids are attracted to each other.