Volume 73, Number 6, March 2006
|Page(s)||864 - 870|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 February 2006|
Localisation-delocalisation transition of electrolytes between micro-electrodes
Institut für Theoretische Physik II, Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1, D-40225 Düsseldorf, Germany
Accepted: 17 January 2006
Employing computer simulations and Poisson-Boltzmann theory, we show that a symmetric electrolyte in an electric condenser undergoes a localisation-delocalisation transition as a function of the external voltage U. The transition occurs at the critical voltage corresponding to the situation where the surface charge density of the plates equals the area charge density of completely charge-separated electrolytes. The average distance of the electrolyte ions to the plates diverges logarithmically for . This transition is expected to be observable in micro-electrodes.
PACS: 61.20.Qg – Structure of associated liquids: electrolytes, molten salts, etc / 61.20.Ja – Computer simulation of liquid structure / 82.70.Dd – Colloids
© EDP Sciences, 2006
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