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

Journal article
Authors Felix Kümmel
Parmida Shabestari
Celia Lozano
Giovanni Volpe
Clemens Bechinger
Published in Soft Matter
Volume 11
Pages 6187-6191
ISSN 1744683X
Publication year 2015
Published at
Pages 6187-6191
Language en
Subject categories Physical Sciences


© The Royal Society of Chemistry 2015. 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.

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