User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse




Journal Article

Size dependence of the propulsion velocity for catalytic Janus-sphere swimmers


Golestanian,  Ramin
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Ebbens, S., Tu, M. H., Howse, J. R., & Golestanian, R. (2012). Size dependence of the propulsion velocity for catalytic Janus-sphere swimmers. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 85(2): 020401(R). doi:10.1103/PhysRevE.85.020401.

Cite as: http://hdl.handle.net/21.11116/0000-0001-7875-5
The propulsion velocity of active colloids that asymmetrically catalyze a chemical reaction is probed experimentally as a function of their sizes. It is found that over the experimentally accessible range, the velocity decays as a function of size, with a rate that is compatible with an inverse size dependence. A diffusion-reaction model for the concentrations of the fuel and waste molecules that takes into account a two-step process for the asymmetric catalytic activity on the surface of the colloid is shown to predict a similar behavior for colloids at the large size limit, with a saturation for smaller sizes. © 2012 American Physical Society.