Test-charge theory for the electric double layer

Yoram Burak, David Andelman, Henri Orland

Research output: Contribution to journalArticlepeer-review


A model based on the response of the ions to the presence of a single test particle for the ion distribution near a charged surface was developed. It was found that the model can produce the exact density profile in the limits of weak and strong coupling, which correspond to zero and infinite values of the dimensionless coupling parameter. The model also provided an elementary theoretical framework for studying ion correlation effects near charged objects. It was concluded that for large values of the coupling parameter, the model can predict a crossover from exponential to algebraic decay at large distance from the charged plate.

Original languageEnglish
Article number016102
Pages (from-to)016102-1-016102-18
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number1 2
StatePublished - Jul 2004


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