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Issue 25, 2016
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Removing grain boundaries from three-dimensional colloidal crystals using active dopants

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Abstract

Using computer simulations we explore how grain boundaries can be removed from three-dimensional colloidal crystals by doping with a small fraction of active colloids. We show that for sufficient self-propulsion, the system is driven into a crystal-fluid coexistence. In this phase separated regime, the active dopants become mobile and spontaneously gather at the grain boundaries. The resulting surface melting and recrystallization of domains result in the motion of the grain boundaries over time and lead to the formation of a large single crystal. However, when the self-propulsion is too low to cause a phase separation, we observe no significant enhancement of grain growth.

Graphical abstract: Removing grain boundaries from three-dimensional colloidal crystals using active dopants

  • This article is part of the themed collection: Colloids
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Publication details

The article was received on 22 Mar 2016, accepted on 27 May 2016 and first published on 30 May 2016


Article type: Paper
DOI: 10.1039/C6SM00700G
Citation: Soft Matter, 2016,12, 5630-5635
  • Open access: Creative Commons BY license
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    Removing grain boundaries from three-dimensional colloidal crystals using active dopants

    B. van der Meer, M. Dijkstra and L. Filion, Soft Matter, 2016, 12, 5630
    DOI: 10.1039/C6SM00700G

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