Schematic models for active nonlinear microrheology

M. V. Gnann, I. Gazuz, A. M. Puertas, M. Fuchs, Th. Voigtmann

Research output: Contribution to journalArticleScientificpeer-review

43 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1390-1396
Number of pages7
JournalSoft matter
Issue number4
Publication statusPublished - 21 Feb 2011
Externally publishedYes


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