%0 Journal Article
%T How to capture active particles
%A A. Kaiser
%A H. H. Wensink
%A H. L£¿wen
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevLett.108.268307
%X For many applications, it is important to catch collections of autonomously navigating microbes and man-made microswimmers in a controlled way. Here we propose an efficient trap to collectively capture self-propelled colloidal rods. By means of computer simulation in two dimensions, we show that a static chevron-shaped wall represents an optimal boundary for a trapping device. Its catching efficiency can be tuned by varying the opening angle of the trap. For increasing angles, there is a sequence of three emergent states corresponding to partial, complete, and no trapping. A trapping `phase diagram' maps out the trap conditions under which the capture of self-propelled particles at a given density is rendered optimal.
%U http://arxiv.org/abs/1202.0312v1