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Issue 43, 2015
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Phase separation and self-assembly in a fluid of Mickey Mouse particles

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Recent developments in the synthesis of colloidal particles allow for control over shape and inter-particle interaction. One example, among others, is the so-called “Mickey Mouse” (MM) particle for which the self-assembly properties have been previously studied yielding a stable cluster phase together with elongated, tube-like structures. Here, we investigate under which conditions a fluid of Mickey Mouse particles can yield phase separation and how the self-assembly behaviour affects the gas–liquid coexistence. We vary the distance between the repulsive and the attractive lobes (bond length), and the interaction range, and follow the evolution of the gas–liquid (GL) coexistence curve. We find that upon increasing the bond length distance the binodal line shifts to lower temperatures, and that the interaction range controls the transition between phase separation and self-assembly of clusters. Upon further reduction of the interaction range and temperature, the clusters assume an increasingly ordered tube-like shape, ultimately matching the one previously reported in literature. These results are of interest when designing particle shape and particle–particle interaction for self-assembly processes.

Graphical abstract: Phase separation and self-assembly in a fluid of Mickey Mouse particles

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Publication details

The article was received on 19 Aug 2015, accepted on 04 Sep 2015 and first published on 11 Sep 2015

Article type: Paper
DOI: 10.1039/C5SM02076J
Citation: Soft Matter, 2015,11, 8432-8440

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    Phase separation and self-assembly in a fluid of Mickey Mouse particles

    G. Avvisati and M. Dijkstra, Soft Matter, 2015, 11, 8432
    DOI: 10.1039/C5SM02076J

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