Experimental Observation of Flow Fields Around Active Janus Spheres
Soft Condensed Matter
2019-09-11 v3 Fluid Dynamics
Abstract
The hydrodynamic flow field around a catalytically active colloid is probed using particle tracking velocimetry both in the freely swimming state and when kept stationary with an external force. Our measurements provide information about the fluid velocity in the vicinity of the surface of the colloid, and confirm a mechanism for propulsion that was proposed recently. In addition to offering a unified understanding of the nonequilibrium interfacial transport processes at stake, our results open the way to a thorough description of the hydrodynamic interactions between such active particles and understanding their collective dynamics.
Cite
@article{arxiv.1802.04600,
title = {Experimental Observation of Flow Fields Around Active Janus Spheres},
author = {Andrew I. Campbell and Stephen J. Ebbens and Pierre Illien and Ramin Golestanian},
journal= {arXiv preprint arXiv:1802.04600},
year = {2019}
}