Publikation: Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
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2013
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Physical Review Letters. 2013, 110(23), 238301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.238301
Zusammenfassung
We study experimentally and numerically a (quasi) two dimensional colloidal suspension of self-propelled spherical particles. The particles are carbon-coated Janus particles, which are propelled due to diffusiophoresis in a near-critical water-lutidine mixture. At low densities, we find that the driving stabilizes small clusters. At higher densities, the suspension undergoes a phase separation into large clusters and a dilute gas phase. The same qualitative behavior is observed in simulations of a minimal model for repulsive self-propelled particles lacking any alignment interactions. The observed behavior is rationalized in terms of a dynamical instability due to the self-trapping of self-propelled particles.
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BUTTINONI, Ivo, Julian BIALKÉ, Felix KÜMMEL, Hartmut LÖWEN, Clemens BECHINGER, Thomas SPECK, 2013. Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles. In: Physical Review Letters. 2013, 110(23), 238301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.238301BibTex
@article{Buttinoni2013-05-17T20:13:04ZDynam-39282,
year={2013},
doi={10.1103/PhysRevLett.110.238301},
title={Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles},
number={23},
volume={110},
issn={0031-9007},
journal={Physical Review Letters},
author={Buttinoni, Ivo and Bialké, Julian and Kümmel, Felix and Löwen, Hartmut and Bechinger, Clemens and Speck, Thomas},
note={Article Number: 238301}
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<dcterms:abstract xml:lang="eng">We study experimentally and numerically a (quasi) two dimensional colloidal suspension of self-propelled spherical particles. The particles are carbon-coated Janus particles, which are propelled due to diffusiophoresis in a near-critical water-lutidine mixture. At low densities, we find that the driving stabilizes small clusters. At higher densities, the suspension undergoes a phase separation into large clusters and a dilute gas phase. The same qualitative behavior is observed in simulations of a minimal model for repulsive self-propelled particles lacking any alignment interactions. The observed behavior is rationalized in terms of a dynamical instability due to the self-trapping of self-propelled particles.</dcterms:abstract>
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