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Issue 46, 2018
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Phase separation around a heated colloid in bulk and under confinement

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Abstract

We study the non-equilibrium coarsening dynamics of a binary liquid solvent around a colloidal particle in the presence of a time-dependent temperature gradient that emerges after a temperature quench of a suitable coated colloid surface. The solvent is maintained at its critical concentration and the colloid is fixed in space. The coarsening patterns near the surface are shown to be strongly dependent on the colloid surface adsorption properties and on the temperature evolution. The temperature gradient alters the morphology of the binary solvent near the surface of the colloid as compared to the coarsening proceeding at a constant temperature everywhere. We also present results for the evolution of coarsening in thin films with confining surfaces preferring one species of the binary liquid mixture over the other. Confinement leads to a faster phase segregation process and formation of a bridge connecting the colloid and both confining walls.

Graphical abstract: Phase separation around a heated colloid in bulk and under confinement

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Publication details

The article was received on 19 Jun 2018, accepted on 26 Aug 2018 and first published on 19 Sep 2018


Article type: Paper
DOI: 10.1039/C8SM01258J
Citation: Soft Matter, 2018,14, 9326-9335
  • Open access: Creative Commons BY license
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    Phase separation around a heated colloid in bulk and under confinement

    S. Roy and A. Maciołek, Soft Matter, 2018, 14, 9326
    DOI: 10.1039/C8SM01258J

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