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Title: Chemotaxis of artificial microswimmers in active density waves
Authors: Geiseler, Alexander
Hanggi, Peter
Marchesoni, Fabio
Mulhern, Colm
Savel'ev, Sergey
Issue Date: 2016
Publisher: © American Physical Society
Citation: GEISELER, A. ...et al., 2016. Chemotaxis of artificial microswimmers in active density waves. Physical Review E, 94, 012613.
Abstract: © 2016 American Physical Society.Living microorganisms are capable of a tactic response to external stimuli by swimming toward or away from the stimulus source; they do so by adapting their tactic signal transduction pathways to the environment. Their self-motility thus allows them to swim against a traveling tactic wave, whereas a simple fore-rear asymmetry argument would suggest the opposite. Their biomimetic counterpart, the artificial microswimmers, also propel themselves by harvesting kinetic energy from an active medium, but, in contrast, lack the adaptive capacity. Here we investigate the transport of artificial swimmers subject to traveling active waves and show, by means of analytical and numerical methods, that self-propelled particles can actually diffuse in either direction with respect to the wave, depending on its speed and waveform. Moreover, chiral swimmers, which move along spiraling trajectories, may diffuse preferably in a direction perpendicular to the active wave. Such a variety of tactic responses is explained by the modulation of the swimmer's diffusion inside traveling active pulses.
Description: This paper was accepted for publication in the journal Physical Review E and the definitive published version is available at http://dx.doi.org/10.1103/PhysRevE.94.012613
Version: Accepted for publication
DOI: 10.1103/PhysRevE.94.012613
URI: https://dspace.lboro.ac.uk/2134/22307
Publisher Link: http://dx.doi.org/10.1103/PhysRevE.94.012613
ISSN: 1539-3755
Appears in Collections:Published Articles (Physics)

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