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  Mobility gradient induces cross-streamline migration of semiflexible polymers

Steinhauser, D., Köster, S., & Pfohl, T. (2012). Mobility gradient induces cross-streamline migration of semiflexible polymers. ACS Macro Letters, 1(5), 541-545. doi:10.1021/mz3000539.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-80B8-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-80B9-8
Genre: Journal Article

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 Creators:
Steinhauser, Dagmar1, Author              
Köster, Sarah, Author
Pfohl, Thomas1, Author              
Affiliations:
1Group Dynamics of biological matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063313              

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 Abstract: Many aspects of modern material science and biology rely on the strategic manipulation and understanding of polymer dynamics in confining micro- and nanoflow. We directly observe and analyze nonequilibrium structural and dynamic properties of individual semiflexible actin filaments in pressure-driven microfluidic channel flow using fluorescence microscopy. Different conformational shapes, such as filaments fluctuating in an elongated manner, parabolically bent, as well as tumbling, are identified. With increasing flow velocity, a strong center-of-mass migration toward the channel walls is observed. This significant migration effect can be explained by a shear rate dependent spatial diffusivity due to a gradient in chain mobility of the semiflexible polymers.

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Language(s): eng - English
 Dates: 2012-04-102012
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1021/mz3000539
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Title: ACS Macro Letters
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 1 (5) Sequence Number: - Start / End Page: 541 - 545 Identifier: ISSN: 2161-1653
CoNE: https://pure.mpg.de/cone/journals/resource/2161-1653