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Efficiency of Surface-Driven Motion: Nanoswimmers Beat Microswimmers

Efficiency of Surface-Driven Motion: Nanoswimmers Beat Microswimmers Surface interactions provide a class of mechanisms which can be employed for propulsion of micrometer and nanometer sized particles. We investigate the related efficiency of externally and self-propelled swimmers. A general scaling relation is derived showing that only swimmers whose size is comparable to, or smaller than, the interaction range can have appreciable efficiency. An upper bound for efficiency at maximum power is 1 / 2 . Numerical calculations for the case of diffusiophoresis are found to be in good agreement with analytical expressions for the efficiency. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Letters American Physical Society (APS)

Efficiency of Surface-Driven Motion: Nanoswimmers Beat Microswimmers

Physical Review Letters , Volume 105 (21) – Nov 19, 2010
4 pages

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References (11)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2010 The American Physical Society
ISSN
1079-7114
DOI
10.1103/PhysRevLett.105.218103
pmid
21231358
Publisher site
See Article on Publisher Site

Abstract

Surface interactions provide a class of mechanisms which can be employed for propulsion of micrometer and nanometer sized particles. We investigate the related efficiency of externally and self-propelled swimmers. A general scaling relation is derived showing that only swimmers whose size is comparable to, or smaller than, the interaction range can have appreciable efficiency. An upper bound for efficiency at maximum power is 1 / 2 . Numerical calculations for the case of diffusiophoresis are found to be in good agreement with analytical expressions for the efficiency.

Journal

Physical Review LettersAmerican Physical Society (APS)

Published: Nov 19, 2010

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