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Issue 17, 2016
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Active colloids at fluid interfaces

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Abstract

If an active Janus particle is trapped at the interface between a liquid and a fluid, its self-propelled motion along the interface is affected by a net torque on the particle due to the viscosity contrast between the two adjacent fluid phases. For a simple model of an active, spherical Janus colloid we analyze the conditions under which translation occurs along the interface and we provide estimates of the corresponding persistence length. We show that under certain conditions the persistence length of such a particle is significantly larger than the corresponding one in the bulk liquid, which is in line with the trends observed in recent experimental studies.

Graphical abstract: Active colloids at fluid interfaces

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Article information


Submitted
12 Feb 2016
Accepted
08 Mar 2016
First published
09 Mar 2016

This article is Open Access

Soft Matter, 2016,12, 4007-4023
Article type
Paper

Active colloids at fluid interfaces

P. Malgaretti, M. N. Popescu and S. Dietrich, Soft Matter, 2016, 12, 4007
DOI: 10.1039/C6SM00367B

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