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Issue 31, 2015
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Formation, compression and surface melting of colloidal clusters by active particles

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Abstract

We demonstrate with experiments and numerical simulations that the structure and dynamics of a suspension of passive particles is strongly altered by adding a very small (<1%) number of active particles. With increasing passive particle density, we observe first the formation of dynamic clusters comprised of passive particles being surrounded by active particles, then the merging and compression of these clusters, and eventually the local melting of crystalline regions by enclosed active particles.

Graphical abstract: Formation, compression and surface melting of colloidal clusters by active particles

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Article information


Submitted
08 Apr 2015
Accepted
25 Jun 2015
First published
25 Jun 2015

Soft Matter, 2015,11, 6187-6191
Article type
Paper
Author version available

Formation, compression and surface melting of colloidal clusters by active particles

F. Kümmel, P. Shabestari, C. Lozano, G. Volpe and C. Bechinger, Soft Matter, 2015, 11, 6187
DOI: 10.1039/C5SM00827A

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