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How roughness affects the depletion mechanism

Abstract

We develop a simple model, in the spirit of the Asakura-Oosawa theory, able to describe the effects of surface roughness on the depletion potential as a function of a small set of parameters. The resulting explicit expressions are easily computed, without free parameters, for a wide range of physically interesting conditions. Comparison with the recent numerical simulations [M. Kamp et al., Langmuir, 2016, 32, 1233] shows an encouraging agreement and allows to predict the onset of colloidal aggregation in dilute suspensions of rough particles. Furthermore, the model proves to be suitable to investigate the role of the geometry of the roughness.

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Publication details

The article was received on 04 Apr 2017, accepted on 05 Jun 2017 and first published on 07 Jun 2017


Article type: Paper
DOI: 10.1039/C7SM00674H
Citation: Soft Matter, 2017, Accepted Manuscript
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    How roughness affects the depletion mechanism

    P. Anzini and A. Parola, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM00674H

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