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Charge Reversal of Surfaces in Divalent Electrolytes: The Role of Ionic Dispersion Interactions

Parsons, Drew; Ninham, Barry


Surface potentials of alkali earth nitrates at a mica surface are calculated using a modified Poisson-Boltzmann approach that includes nonelectrostatic ion-surface dispersion interactions. New ab initio dynamic polarizabilities are used to determine dispersion interactions. A hydration model describing the hydration shell of cations is presented. Excellent agreement with experiment is achieved, including charge reversal at high electrolyte concentration without the need for site binding models....[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Langmuir
DOI: 10.1021/la9041265


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