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Scientific article
English

Charge Regulation in the Electrical Double Layer: Ion Adsorption and Surface Interactions

Published inLangmuir, vol. 32, no. 2, p. 380-400
Publication date2016
Abstract

Charge regulation in the electrical double layer has important implications for ion adsorption, interparticle forces, colloidal stability, and deposition phenomena. Although charge regulation generally receives little attention, its consequences can be major, especially when considering interactions between unequally charged surfaces. The present article discusses common approaches to quantify such phenomena, especially within classical Poisson−Boltzmann theory, and pinpoints numerous situations where a consideration of charge regulation is essential. For the interpretation of interaction energy profiles, we advocate the use of the constant regulation approximation, which summarizes the surface properties in terms of two quantities, namely, the diffuse layer potential and the regulation parameter. This description also captures some pronounced regulation effects observed in the presence of multivalent ions.

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Citation (ISO format)
TREFALT, Gregor, BEHRENS, Sven Holger, BORKOVEC, Michal. Charge Regulation in the Electrical Double Layer: Ion Adsorption and Surface Interactions. In: Langmuir, 2016, vol. 32, n° 2, p. 380–400. doi: 10.1021/acs.langmuir.5b03611
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ISSN of the journal0743-7463
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