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Issue 38, 2010
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A numerical study of one-patch colloidal particles: from square-well to Janus

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Abstract

We perform numerical simulations of a simple model of one-patch colloidal particles to investigate: (i) the behavior of the gas–liquid phase diagram on moving from a spherical attractive potential to a Janus potential and (ii) the collective structure of a system of Janus particles. We show that, for the case where one of the two hemispheres is attractive and one is repulsive, the system organizes into a dispersion of orientationally ordered micelles and vesicles and, at low temperature (T), the system can be approximated as a fluid of such clusters, interacting essentially via excluded volume. The stability of this cluster phase generates a very peculiar shape of the gas and liquid coexisting densities, with a gas coexistence density that increases on cooling, approaching the liquid coexistence density at very low T.

Graphical abstract: A numerical study of one-patch colloidal particles: from square-well to Janus

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Publication details

The article was received on 10 May 2010, accepted on 15 Jun 2010 and first published on 11 Aug 2010


Article type: Paper
DOI: 10.1039/C0CP00504E
Citation: Phys. Chem. Chem. Phys., 2010,12, 11869-11877
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    A numerical study of one-patch colloidal particles: from square-well to Janus

    F. Sciortino, A. Giacometti and G. Pastore, Phys. Chem. Chem. Phys., 2010, 12, 11869
    DOI: 10.1039/C0CP00504E

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