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Interaction of charged surfaces in electrolyte solutions

✍ Scribed by Roland Kjellander; Stjepan Marčelja

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
442 KB
Volume
127
Category
Article
ISSN
0009-2614

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✦ Synopsis

We report a restricted primitive model calculation of the double-layer interaction between two uniformly charged surfaces immersed in an electrolyte solution, where the anisotropic hypernetted chain approximation is utilized for the pair correlations. The strong, attractive pressure contribution resulting from ion-ion correlations is very similar to that found earlier for double layers with only counterions present. Consequently, the Poisson-Boltzmann equation, which neglects ion-ion correlations, significantly overestimates the double-layer repulsion in most situations. Some ion concentration profiles are presented, and for large separations between the surfaces the profiles close to each surface agree with grand canonical simulation results for a single wall.

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