Currents and flux-inversion in photokinetic active particles

Soft Matter
Claudio MaggiRoberto Di Leonardo

Abstract

Many active particles, both of biological and synthetic origin, can have a light controllable propulsion speed, a property that in biology is commonly referred to as photokinesis. Here we investigate directed transport of photokinetic particles by traveling light patterns. We find general expressions for the current in the cases where the motility wave, induced by light, shifts very slowly or very quickly. These asymptotic formulas are independent of the shape of the wave and are valid for a wide class of active particle models. Moreover we derive an exact solution for the one-dimensional "run and tumble" model. Our results could be used to design time-varying illumination patterns for fast and efficient spatial reconfiguration of photokinetic colloids or bacteria.

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Citations

Aug 23, 2019·Soft Matter·Nick KoumakisWilson C K Poon
Jun 9, 2019·Nature Communications·Celia Lozano, Clemens Bechinger
Dec 25, 2019·Physical Review. E·L Angelani, R Garra
Aug 9, 2020·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·A JavadiM Polin
Aug 15, 2018·ELife·Giacomo FrangipaneRoberto Di Leonardo
Jan 25, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Alexander R SprengerHartmut Loewen
Jan 27, 2022·Soft Matter·Lorenzo CapriniHartmut Löwen

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