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  Fine balance of chemotactic and hydrodynamic torques: When microswimmers orbit a pillar just once

Jin, C., Vachier, J., Bandyopadhyay, S., Macharashvili, T., & Maass, C. C. (2019). Fine balance of chemotactic and hydrodynamic torques: When microswimmers orbit a pillar just once. Physical Review E, 100: 040601(R). doi:10.1103/PhysRevE.100.040601.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-E9BF-F Version Permalink: http://hdl.handle.net/21.11116/0000-0005-1988-6
Genre: Journal Article

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 Creators:
Jin, Chenyu1, Author              
Vachier, Jérémy2, Author              
Bandyopadhyay, Soumya, Author
Macharashvili, Tamara, Author
Maass, Corinna C.1, Author              
Affiliations:
1Group Active soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063307              
2Group Non-equilibrium soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063308              

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 Abstract: We study the detention statistics of self-propelling droplet microswimmers attaching to microfluidic pillars. These droplets show negative autochemotaxis: they shed a persistent repulsive trail of spent fuel that biases them to detach from pillars in a specific size range after orbiting them just once. We have designed a microfluidic assay recording microswimmers in pillar arrays of varying diameter, derived detention statistics via digital image analysis, and interpreted these statistics via the Langevin dynamics of an active Brownian particle model. By comparing data from orbits with and without residual chemical field, we can independently estimate quantities such as hydrodynamic and chemorepulsive torques, chemical coupling constants and diffusion coefficients, as well as their dependence on environmental factors such as wall curvature. This type of analysis is generalizable to many kinds of microswimmers.

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Language(s): eng - English
 Dates: 2019-10-242019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevE.100.040601
 Degree: -

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Title: Physical Review E
Source Genre: Journal
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Publ. Info: Melville, NY : American Physical Society
Pages: 6 Volume / Issue: 100 Sequence Number: 040601(R) Start / End Page: - Identifier: ISSN: 1539-3755
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012