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Anomalous dynamics of intruders in a crowded environment of mobile obstacles

Sentjabrskaja, Tatjana and Zaccarelli, Emanuela and De Michele, Cristiano and Sciortino, Francesco and Tartaglia, Piero and Voigtmann, Thomas and Egelhaaf, Stefan U. and Laurati, Marco (2016) Anomalous dynamics of intruders in a crowded environment of mobile obstacles. Nature Communications, 7. Nature Publishing Group. doi: 10.1038/ncomms11133. ISSN 2041-1723.

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Many natural and industrial processes rely on constrained transport, such as proteins moving through cells, particles confined in nanocomposite materials or gels, individuals in highly dense collectives and vehicular traffic conditions. These are examples of motion through crowded environments, in which the host matrix may retain some glass-like dynamics. Here we investigate constrained transport in a colloidal model system, in which dilute small spheres move in a slowly rearranging, glassy matrix of large spheres. Using confocal differential dynamic microscopy and simulations, here we discover a critical size asymmetry, at which anomalous collective transport of the small particles appears, manifested as a logarithmic decay of the density autocorrelation functions. We demonstrate that the matrix mobility is central for the observed anomalous behaviour. These results, crucially depending on size-induced dynamic asymmetry, are of relevance for a wide range of phenomena ranging from glassy systems to cell biology.

Item URL in elib:https://elib.dlr.de/103876/
Document Type:Article
Title:Anomalous dynamics of intruders in a crowded environment of mobile obstacles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sentjabrskaja, TatjanaUniversity of DüsseldorfUNSPECIFIEDUNSPECIFIED
Zaccarelli, EmanuelaUniversita di Roma La SapienzaUNSPECIFIEDUNSPECIFIED
De Michele, CristianoUniversita di Roma La SapienzaUNSPECIFIEDUNSPECIFIED
Sciortino, FrancescoUniversita di Roma La SapienzaUNSPECIFIEDUNSPECIFIED
Tartaglia, PieroUniversita di Roma La SapienzaUNSPECIFIEDUNSPECIFIED
Voigtmann, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-1261-9295UNSPECIFIED
Egelhaaf, Stefan U.University of DüsseldorfUNSPECIFIEDUNSPECIFIED
Laurati, MarcoUniversidad de LeonUNSPECIFIEDUNSPECIFIED
Date:April 2016
Journal or Publication Title:Nature Communications
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Nature Publishing Group
Keywords:crowded environments, heterogeneous media, anomalous transport
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:13 Apr 2016 09:27
Last Modified:08 Mar 2018 18:35

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