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Active and Nonlinear Microrheology in Dense Colloidal Suspensions

Gazuz, Igor and Puertas, A. M. and Voigtmann, Thomas and Fuchs, Matthias (2009) Active and Nonlinear Microrheology in Dense Colloidal Suspensions. Physical Review Letters, 102 (24), p. 248302. American Physical Society. DOI: 10.1103/PhysRevLett.102.248302

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Abstract

We present a first-principles theory for the active nonlinear microrheology of colloidal model system; for a constant external force on a spherical probe particle embedded in a dense host dispersion, neglecting hydrodynamic interactions, we derive an exact expression for the friction. Within mode-coupling theory, we discuss the threshold external force needed to delocalize the probe from a host glass, and its relation to strong nonlinear velocity-force curves in a host fluid. Experimental microrheology data and simulations, which we performed, are explained with a simplified model.

Item URL in elib:https://elib.dlr.de/59670/
Document Type:Article
Title:Active and Nonlinear Microrheology in Dense Colloidal Suspensions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gazuz, IgorUNSPECIFIEDUNSPECIFIED
Puertas, A. M.UNSPECIFIEDUNSPECIFIED
Voigtmann, ThomasUNSPECIFIEDUNSPECIFIED
Fuchs, MatthiasUNSPECIFIEDUNSPECIFIED
Date:2009
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:102
DOI :10.1103/PhysRevLett.102.248302
Page Range:p. 248302
Publisher:American Physical Society
Status:Published
Keywords:microrheology, colloidal suspensions, mode-coupling theory, delocalization transition
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - 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:11 Aug 2009 08:27
Last Modified:30 May 2019 22:05

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