Volume 116, Number 5, December 2016
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||20 January 2017|
Diffusive-convective transition in the non-equilibrium charging of an electric double layer
1 School of Physics, University College Dublin - Belfield, Dublin 4, Ireland
2 Fachbereich Physik, Freie Universität Berlin - 14195 Berlin, Germany
Received: 5 September 2016
Accepted: 2 January 2017
We study the non-equilibrium electrolyte kinetics in a planar nanocapacitor that is driven by periodically switching surfaces charges using simulations, theory and scaling analysis. The combined effects of inter-ionic charge correlations and hydrodynamic interactions lead to correlated convective behavior for weakly charged ions. These dynamic correlations, signaling the breakdown of the Poisson-Nernst-Planck theory, are distinct from static correlations that are manifested by the crossover from Poisson-Boltzmann to strong-coupling theory that occurs as the ion valency increases.
PACS: 82.45.-h – Electrochemistry and electrophoresis / 66.10.-x – Diffusion and ionic conduction in liquids / 66.20.-d – Viscosity of liquids; diffusive momentum transport
© EPLA, 2016
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