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Issue 26, 2017
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Steering patchy particles using multivalent electrolytes

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Proteins and many recently designed colloids can be regarded as patchy particles where directional interactions strongly influence and govern assembly behavior. Using explicit ion implicit solvent Metropolis Monte Carlo simulations, we investigate spherical model particles, carrying both charge and electric patches, in dilute aqueous 1 : 1, 1 : 3, and 3 : 1 electrolyte solutions. Striking differences in pair interaction free energies and orientational correlations are induced by three different salts which are discussed and rationalized in terms of ion-binding to surface groups, ion–ion correlations, and double layer forces. These findings suggest a general strategy where directional, intermolecular interactions can be invoked and tuned via small amounts of a carefully chosen electrolyte.

Graphical abstract: Steering patchy particles using multivalent electrolytes

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The article was received on 07 Mar 2017, accepted on 09 May 2017 and first published on 10 May 2017

Article type: Paper
DOI: 10.1039/C7SM00470B
Citation: Soft Matter, 2017,13, 4591-4597
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    Steering patchy particles using multivalent electrolytes

    A. I. Abrikosov, B. Stenqvist and M. Lund, Soft Matter, 2017, 13, 4591
    DOI: 10.1039/C7SM00470B

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