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  Collective dynamics effect transient subdiffusion of inert tracers in flexible gel networks.

Godec, A., Bauer, M., & Metzler, R. (2014). Collective dynamics effect transient subdiffusion of inert tracers in flexible gel networks. New Journal of Physics, 16: 092002. doi:10.1088/1367-2630/16/9/092002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-CB74-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-CB78-7
Genre: Journal Article

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Godec, A.1, Author              
Bauer, M., Author
Metzler, R., Author
Affiliations:
1Research Group of Mathematical Biophysics, MPI for Biophysical Chemistry, Max Planck Society, ou_2396692              

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Free keywords: anomalous diffusion; gel network; van Hove correlation
 Abstract: Based on extensive Brownian dynamics simulations we study the thermal motion of a tracer bead in a cross-linked, flexible gel in the limit when the tracer particle size is comparable to or even larger than the equilibrium mesh size of the gel. The analysis of long individual trajectories of the tracer demonstrates the existence of pronounced transient anomalous diffusion. From the time averaged mean squared displacement and the time averaged van Hove correlation functions we elucidate the many-body origin of the non-Brownian tracer bead dynamics. Our results shed new light onto the ongoing debate over the physical origin of steric tracer interactions with structured environments.

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Language(s): eng - English
 Dates: 2014-09-162014-09-22
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1367-2630/16/9/092002
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Title: New Journal of Physics
Source Genre: Journal
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Pages: 13 Volume / Issue: 16 Sequence Number: 092002 Start / End Page: - Identifier: -