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Attractions between charged colloidal spheres mediated by correlated absorbed ions

Francisco J. Solis·Monica Olvera de la Cruz
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Abstract

We describe arrangements of ions capable of producing short-range attractive interactions between pairs of charged colloidal spheres in the low temperature strongly correlated limit. For particles of radius $R$ with bare charge $Z$ and comparable absorbed charge $-N$ ($N \sim Z$), the correlations contribution to the spheres self-energy scales as $N^{3/2}/R$, and as $N/R$ for the interaction energy between two touching spheres. We show that the re-arrangement of charges due to polarization plays an insignificant role in the nature and magnitude of the interaction.

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Francisco J. Solis, Monica Olvera de la Cruz. 2000-10-04. Attractions between charged colloidal spheres mediated by correlated absorbed ions. https://arxiv.org/abs/cond-mat/0010065

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