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Royal Society of Chemistry, Soft Matter, 4(7), p. 1390, 2011

DOI: 10.1039/c0sm00828a

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Schematic Models for Active Nonlinear Microrheology

Journal article published in 2010 by Manuel V. Gnann, Igor Gazuz, Antonio M. Puertas, Matthias Fuchs, Thomas-H. Voigtmann ORCID
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This paper is available in a repository.

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Abstract

We analyze the nonlinear active microrheology of dense colloidal suspensions using a schematic model of mode-coupling theory. The model describes the strongly nonlinear behavior of the microscopic friction coefficient as a function of applied external force in terms of a delocalization transition. To probe this regime, we have performed Brownian dynamics simulations of a system of quasi-hard spheres. We also analyze experimental data on hard-sphere-like colloidal suspensions [Habdas et al., Europhys. Lett., 2004, 67, 477]. The behavior at very large forces is addressed specifically.