Dynamic clustering in active colloidal suspensions with chemical signaling

Theurkauff I, Cottin-Bizonne C, Palacci JA, Ybert C, Bocquet L. 2012. Dynamic clustering in active colloidal suspensions with chemical signaling. Physical Review Letters. 108(26), 268303.


Journal Article | Published | English

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Author
Theurkauff, I.; Cottin-Bizonne, C.; Palacci, Jérémie AIST Austria; Ybert, C.; Bocquet, L.
Abstract
In this Letter, we explore experimentally the phase behavior of a dense active suspension of self-propelled colloids. In addition to a solidlike and gaslike phase observed for high and low densities, a novel cluster phase is reported at intermediate densities. This takes the form of a stationary assembly of dense aggregates—resulting from a permanent dynamical merging and separation of active colloids—whose average size grows with activity as a linear function of the self-propelling velocity. While different possible scenarios can be considered to account for these observations—such as a generic velocity weakening instability recently put forward—we show that the experimental results are reproduced mathematically by a chemotactic aggregation mechanism, originally introduced to account for bacterial aggregation and accounting here for diffusiophoretic chemical interaction between colloidal swimmers.
Publishing Year
Date Published
2012-06-29
Journal Title
Physical Review Letters
Volume
108
Issue
26
Article Number
268303
ISSN
eISSN
IST-REx-ID

Cite this

Theurkauff I, Cottin-Bizonne C, Palacci JA, Ybert C, Bocquet L. Dynamic clustering in active colloidal suspensions with chemical signaling. Physical Review Letters. 2012;108(26). doi:10.1103/physrevlett.108.268303
Theurkauff, I., Cottin-Bizonne, C., Palacci, J. A., Ybert, C., & Bocquet, L. (2012). Dynamic clustering in active colloidal suspensions with chemical signaling. Physical Review Letters. American Physical Society . https://doi.org/10.1103/physrevlett.108.268303
Theurkauff, I., C. Cottin-Bizonne, Jérémie A Palacci, C. Ybert, and L. Bocquet. “Dynamic Clustering in Active Colloidal Suspensions with Chemical Signaling.” Physical Review Letters. American Physical Society , 2012. https://doi.org/10.1103/physrevlett.108.268303.
I. Theurkauff, C. Cottin-Bizonne, J. A. Palacci, C. Ybert, and L. Bocquet, “Dynamic clustering in active colloidal suspensions with chemical signaling,” Physical Review Letters, vol. 108, no. 26. American Physical Society , 2012.
Theurkauff I, Cottin-Bizonne C, Palacci JA, Ybert C, Bocquet L. 2012. Dynamic clustering in active colloidal suspensions with chemical signaling. Physical Review Letters. 108(26), 268303.
Theurkauff, I., et al. “Dynamic Clustering in Active Colloidal Suspensions with Chemical Signaling.” Physical Review Letters, vol. 108, no. 26, 268303, American Physical Society , 2012, doi:10.1103/physrevlett.108.268303.
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PMID: 23005020
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