Gouy-Chapman model

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A model of the electrical double layer in which thermal motion causing disordering of the layer is taken into account. This is very similar to the Debye-Hückel theory of the ionic atmosphere around an ion, except that the concept of a central single ion is replaced by that of an infinite plane electrode. The Gouy-Chapman model understates the structure in a double layer, but can be improved by the Stern model, in which the ions closest to the electrode are ordered and the ions are described by the Gouy-Chapman model outside the first layer.

Subjects: Chemistry.

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