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  Shape dependent phoretic propulsion of slender active particles

Ibrahim, Y., Golestanian, R., & Liverpool, T. B. (2018). Shape dependent phoretic propulsion of slender active particles. Physical Review Fluids, 3(3): 033101. doi:10.1103/PhysRevFluids.3.033101.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-705F-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-7075-D
Genre: Journal Article

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Ibrahim, Y., Author
Golestanian, Ramin1, Author              
Liverpool, T. B., Author
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1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2570692              

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 Abstract: We theoretically study the self-propulsion of a thin (slender) colloid driven by asymmetric chemical reactions on its surface at vanishing Reynolds number. Using the method of matched asymptotic expansions, we obtain the colloid self-propulsion velocity as a function of its shape and surface physicochemical properties. The mechanics of self-phoresis for rod-like swimmers has a richer spectrum of behaviors than spherical swimmers due to the presence of two small length scales, the slenderness of the rod and the width of the slip layer. This leads to subtleties in taking the limit of vanishing slenderness. As a result, even for very thin rods, the distribution of curvature along the surface of the swimmer, namely, its shape, plays a surprising role in determining the efficiency of propulsion. We find that thin cylindrical self-phoretic swimmers with blunt ends move faster than thin prolate spheroid shaped swimmers with the same aspect ratio. © 2018 American Physical Society.

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Language(s): eng - English
 Dates: 2018-03-14
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevFluids.3.033101
BibTex Citekey: Ibrahim2018
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Title: Physical Review Fluids
Source Genre: Journal
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Pages: 19 Volume / Issue: 3 (3) Sequence Number: 033101 Start / End Page: - Identifier: -