Attractions between charged colloidal spheres mediated by correlated absorbed ions

Details Attractions between charged colloidal spheres mediated by correlated absorbed ions Attractions between charged colloidal spheres mediated by correlated absorbed ions

2000-10-04

arxiv.org/abs/cond-mat/0010065v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, requires revtex, no figures

Scientific paper

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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