Jump to main content
Jump to site search

Issue 37, 2015
Previous Article Next Article

Enhanced active motion of Janus colloids at the water surface

Author affiliations

Abstract

We have investigated the active motion of self-propelled colloids confined at the air–water interface and explored the possibility of enhancing the directional motion of self-propelled Janus colloids by slowing down their rotational diffusion. The two dimensional motion of micron-sized silica–platinum Janus colloids has been experimentally measured by particle tracking video-microscopy at increasing concentrations of the catalytic fuel, i.e. H2O2. Compared to the motion in the bulk, a dramatic enhancement of both the persistence length of trajectories and the speed has been observed. The interplay of colloid self-propulsion, due to an asymmetric catalytic reaction occurring on the colloid, surface properties and interfacial frictions controls the enhancement of the directional movement. The slowing down of the rotational diffusion at the interface, also measured experimentally, plays a pivotal role in the control and enhancement of active motion.

Graphical abstract: Enhanced active motion of Janus colloids at the water surface

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 May 2015, accepted on 31 Jul 2015 and first published on 31 Jul 2015


Article type: Paper
DOI: 10.1039/C5SM01111F
Citation: Soft Matter, 2015,11, 7376-7384
  •   Request permissions

    Enhanced active motion of Janus colloids at the water surface

    X. Wang, M. In, C. Blanc, M. Nobili and A. Stocco, Soft Matter, 2015, 11, 7376
    DOI: 10.1039/C5SM01111F

Search articles by author

Spotlight

Advertisements