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Issue 6, 2012
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Bicontinuous and mixed gels in binary mixtures of patchy colloidal particles

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Abstract

We investigate the thermodynamics and percolation regimes of model binary mixtures of patchy colloidal particles. The particles of each species have three sites of two types, one of which promotes bonding of particles of the same species while the other promotes bonding of different species. We find up to four percolated structures at low temperatures and densities: two gels where only one species percolates, a mixed gel where particles of both species percolate but neither species percolates separately, and a bicontinuous gel where particles of both species percolate separately forming two interconnected networks. The competition between the entropy and the energy of bonding drives the stability of the different percolating structures. Appropriate mixtures exhibit one or more connectivity transitions between the mixed and bicontinuous gels, as the temperature and/or the composition changes.

Graphical abstract: Bicontinuous and mixed gels in binary mixtures of patchy colloidal particles

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Publication details

The article was received on 12 Oct 2011, accepted on 17 Nov 2011 and first published on 03 Jan 2012


Article type: Paper
DOI: 10.1039/C1SM06948A
Citation: Soft Matter, 2012,8, 1785-1794
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    Bicontinuous and mixed gels in binary mixtures of patchy colloidal particles

    D. de las Heras, J. M. Tavares and M. M. Telo da Gama, Soft Matter, 2012, 8, 1785
    DOI: 10.1039/C1SM06948A

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