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Proceedings Paper

Self-driven particles on asymmetric trap arrays
Author(s): L. M. Lopatina; C. Reichhardt; C. J. Olson Reichhardt
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Paper Abstract

Active matter or self driven particle systems include swimming bacteria, crawling cells and artificial swimmers. These systems often exhibit run and tumble dynamics; however, there are also examples of particles that move or swim in circles, such as bacteria near surfaces. Circular swimmers have also been experimentally realized using chiral colloidal particles. Here we examine how a substrate can be used to direct the motion of circle swimmers and separate particles with different swimming chiralities. The combination of the time reversal symmetry breaking by the circular motion as well as the breaking of detailed balance when the particles interact with the barriers leads to the directed motion. We examine this effect for different types of substrate geometries and also consider the effects of temperature. Such substrates could be created using various optical techniques.

Paper Details

Date Published: 12 September 2013
PDF: 11 pages
Proc. SPIE 8810, Optical Trapping and Optical Micromanipulation X, 881016 (12 September 2013); doi: 10.1117/12.2027325
Show Author Affiliations
L. M. Lopatina, Los Alamos National Lab. (United States)
C. Reichhardt, Los Alamos National Lab. (United States)
C. J. Olson Reichhardt, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 8810:
Optical Trapping and Optical Micromanipulation X
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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