We demonstrate a simple physical fabrication method to control surface roughness of Janus micromotors and fabricate self-propelled active Janus microparticles with rough catalytic platinum surfaces that show a four-fold increase in their propulsion speed compared to conventional Janus particles coated with a smooth Pt layer.
Citacióchoudhury, U., Soler, L., Gibbs, J., Sanchez, S., Fischer, P. Surface roughness-induced speed increase for active Janus micromotors. "Chemical communications", 01 Gener 2015, vol. 51, núm. 41, p. 8660-8663.