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Sedimentation and Effective Temperature of Active Colloidal Suspensions
Open accessAbstract
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.
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Cited by
Dynamic Clustering in Active Colloidal Suspensions with Chemical Signaling
Theurkauff, I., Cottin-Bizonne, C., Palacci, J., Ybert, C., & Bocquet, L. (2012) · Physical Review Letters · doi:10.1103/physrevlett.108.268303 · Cited by 773
Self-citationCircular Motion of Asymmetric Self-Propelling Particles
Kümmel, F., ten Hagen, B., Wittkowski, R., Buttinoni, I., Eichhorn, R., Volpe, G., Löwen, H., & Bechinger, C. (2013) · Physical Review Letters · doi:10.1103/physrevlett.110.198302 · Cited by 469
Emergent behavior in active colloids
Zöttl, A., & Stark, H. (2016) · Journal of Physics: Condensed Matter · doi:10.1088/0953-8984/28/25/253001 · Cited by 426
Osmosis, from molecular insights to large-scale applications
Marbach, S., & Bocquet, L. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00420j · Cited by 316
Self-citationFilms of bacteria at interfaces
Vaccari, L., Molaei, M., Niepa, T. H. R., Lee, D., Leheny, R. L., & Stebe, K. J. (2017) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2017.07.016 · Cited by 70
Metadata
- Authors
- Palacci, J., Cottin-Bizonne, C., Ybert, C., & Bocquet, L.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2010-08-17
- Volume
- 105
- Issue
- 8
- Pages
- 088304-088304
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1806622961
- Cited by
- 525
- References
- 0
- FWCI
- 14.29
- Type
- journal article
- Language
- en
- Open access
- green
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- Palacci, J., Cottin-Bizonne, C., Ybert, C., & Bocquet, L. (2010). Sedimentation and Effective Temperature of Active Colloidal Suspensions. Physical Review Letters. https://doi.org/10.1103/physrevlett.105.088304
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