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Issue 41, 2017
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Cooperative behavior of biased probes in crowded interacting systems

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Abstract

We study, via extensive numerical simulations, dynamics of a crowded mixture of mutually interacting (with a short-range repulsive potential) colloidal particles immersed in a suspending solvent, acting as a heat bath. The mixture consists of a majority component – neutrally buoyant colloids subject to internal stimuli only, and a minority component – biased probes (BPs) also subject to a constant force. In such a system each of the BPs alters the distribution of the colloidal particles in its vicinity, driving their spatial distribution out of equilibrium. This induces effective long-range interactions and multi-tag correlations between the BPs, mediated by an out-of-equilibrium majority component, and prompts the BPs to move collectively assembling in clusters. We analyse the size-distribution of the self-assembling clusters in the steady-state, their specific force–velocity relations and also properties of the effective interactions emerging between the BPs.

Graphical abstract: Cooperative behavior of biased probes in crowded interacting systems

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Publication details

The article was received on 01 May 2017, accepted on 27 Sep 2017 and first published on 27 Sep 2017


Article type: Paper
DOI: 10.1039/C7SM00865A
Citation: Soft Matter, 2017,13, 7617-7624
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    Cooperative behavior of biased probes in crowded interacting systems

    O. A. Vasilyev, O. Bénichou, C. Mejía-Monasterio, E. R. Weeks and G. Oshanin, Soft Matter, 2017, 13, 7617
    DOI: 10.1039/C7SM00865A

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