Charge fluctuations and counterion condensation
- 30 April 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 65 (5) , 051502
- https://doi.org/10.1103/physreve.65.051502
Abstract
We predict a condensation phenomenon in an overall neutral system, consisting of a single charged plate and its oppositely charged counterions. Based on the “two-fluid” model, in which the counterions are divided into a “free” and a “condensed” fraction, we argue that for high surface charge, fluctuations can lead to a phase transition in which a large fraction of counterions is condensed. Furthermore, we show that depending on the valence, the condensation is either a first-order or a smooth transition.Keywords
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