Sedimentation and effective temperature of active colloidal suspensions

Palacci JA, Cottin-Bizonne C, Ybert C, Bocquet L. 2010. Sedimentation and effective temperature of active colloidal suspensions. Physical Review Letters. 105(8), 088304.


Journal Article | Published | English

Scopus indexed
Author
Palacci, Jérémie AIST Austria; Cottin-Bizonne, Cécile; Ybert, Christophe; Bocquet, Lydéric
Abstract
In this Letter, we investigate experimentally the nonequilibrium steady state of an active colloidal suspension under gravity field. The active particles are made of chemically powered colloids, showing self propulsion in the presence of an added fuel, here hydrogen peroxide. The active suspension is studied in a dedicated microfluidic device, made of permeable gel microstructures. Both the microdynamics of individual colloids and the global stationary state of the suspension under gravity are measured with optical microscopy. This yields a direct measurement of the effective temperature of the active system as a function of the particle activity, on the basis of the fluctuation-dissipation relationship. Our work is a first step in the experimental exploration of the out-of-equilibrium properties of active colloidal systems.
Publishing Year
Date Published
2010-08-20
Journal Title
Physical Review Letters
Volume
105
Issue
8
Article Number
088304
ISSN
eISSN
IST-REx-ID

Cite this

Palacci JA, Cottin-Bizonne C, Ybert C, Bocquet L. Sedimentation and effective temperature of active colloidal suspensions. Physical Review Letters. 2010;105(8). doi:10.1103/physrevlett.105.088304
Palacci, J. A., Cottin-Bizonne, C., Ybert, C., & Bocquet, L. (2010). Sedimentation and effective temperature of active colloidal suspensions. Physical Review Letters. American Physical Society . https://doi.org/10.1103/physrevlett.105.088304
Palacci, Jérémie A, Cécile Cottin-Bizonne, Christophe Ybert, and Lydéric Bocquet. “Sedimentation and Effective Temperature of Active Colloidal Suspensions.” Physical Review Letters. American Physical Society , 2010. https://doi.org/10.1103/physrevlett.105.088304.
J. A. Palacci, C. Cottin-Bizonne, C. Ybert, and L. Bocquet, “Sedimentation and effective temperature of active colloidal suspensions,” Physical Review Letters, vol. 105, no. 8. American Physical Society , 2010.
Palacci JA, Cottin-Bizonne C, Ybert C, Bocquet L. 2010. Sedimentation and effective temperature of active colloidal suspensions. Physical Review Letters. 105(8), 088304.
Palacci, Jérémie A., et al. “Sedimentation and Effective Temperature of Active Colloidal Suspensions.” Physical Review Letters, vol. 105, no. 8, 088304, American Physical Society , 2010, doi:10.1103/physrevlett.105.088304.
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PMID: 20868136
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