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arXiv · 1303.6546

The double-layer of penetrable ions: an alternative route to charge reversal

Derek Frydel·Yan Levin
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Abstract

We investigate a double-layer of penetrable ions near a charged wall. We find a new mechanism for charge reversal that occurs in the weak-coupling regime and, accordingly, the system is suitable for the mean-field analysis. The penetrability is achieved by smearing-out the ionic charge inside a sphere, so there is no need to introduce non-electrostatic forces and the system in the low coupling limit can be described by a modified version of the Poisson-Boltzmann equation. The predictions of the theory are compared with the Monte Carlo simulations.

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Derek Frydel, Yan Levin. 2013-03-26. The double-layer of penetrable ions: an alternative route to charge reversal. https://doi.org/10.1063/1.4802994

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