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Issue 19, 2018
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Influence of dielectric inhomogeneities on the structure of charged nanoparticles in neutral polymer solutions

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Abstract

We study the structural characteristics of a system of charged nanoparticles in a neutral polymer solution while accounting for the differences in the dielectric constant between the particles, polymer and the solvent. We use a hybrid computational methodology involving a combination of single chain in mean-field simulations and the solution of the Poisson's equation for the electrostatic field. We quantify the resulting particle structural features in terms of radial distribution function among particles as a function of the dielectric contrast, particle charge, particle volume fraction and polymer concentration. In the absence of polymers, charged macroions experience increased repulsion with a lowering of the ratio of particle to solvent dielectric constant. The influence of the dielectric contrast between the particle and the solvent however diminishes with an increase in the particle volume fraction and/or its charge. In the presence of neutral polymers, similar effects manifest, but with the additional physics arising from the fact that the polymer-induced interactions are influenced by the dielectric contrast of the particle and solvent.

Graphical abstract: Influence of dielectric inhomogeneities on the structure of charged nanoparticles in neutral polymer solutions

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Publication details

The article was received on 09 Feb 2018, accepted on 17 Apr 2018 and first published on 27 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00298C
Citation: Soft Matter, 2018,14, 3748-3759
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    Influence of dielectric inhomogeneities on the structure of charged nanoparticles in neutral polymer solutions

    R. Samanta and V. Ganesan, Soft Matter, 2018, 14, 3748
    DOI: 10.1039/C8SM00298C

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