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Issue 13, 2017
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Transport of underdamped active particles in ratchet potentials

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Abstract

We study the rectified transport of underdamped active noninteracting particles in an asymmetric periodic potential. It is found that the ratchet effect of active noninteracting particles occurs in a single direction (along the easy direction of the substrate asymmetry) in the overdamped limit. However, when the inertia is considered, it is possible to observe reversals of the ratchet effect, where the motion is along the hard direction of the substrate asymmetry. By changing the friction coefficient or the self-propulsion force, the average velocity can change its direction several times. Therefore, by suitably tailoring the parameters, underdamped active particles with different self-propulsion forces can move in different directions and can be separated.

Graphical abstract: Transport of underdamped active particles in ratchet potentials

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Publication details

The article was received on 25 Feb 2017, accepted on 13 Mar 2017 and first published on 14 Mar 2017


Article type: Paper
DOI: 10.1039/C7SM00405B
Citation: Soft Matter, 2017,13, 2536-2542
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    Transport of underdamped active particles in ratchet potentials

    B. Ai and F. Li, Soft Matter, 2017, 13, 2536
    DOI: 10.1039/C7SM00405B

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