English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study an electrolyte confined in a slab of width $W$ composed of twogrounded metallic parallel electrodes. We develop a description of this systemin a low coupling regime beyond the mean field (Poisson--Boltzmann)approximation. There are two ways to model the metallic boundaries: as idealconductors in which the electric potential is zero and it does not fluctuate,or as good conductors in which the average electric potential is zero but thethermal fluctuations of the potential are not zero. This latter model is morerealistic. For the ideal conductor model we find that the disjoining pressureis positive behaves as $1/W^3$ for large separations with a prefactor that isuniversal, i.e. independent of the microscopic constitution of the system. Forthe good conductor boundaries the disjoining pressure is negative and it has anexponential decay for large $W$. We also compute the density and electricpotential profiles inside the electrolyte. These are the same in both models.If the electrolyte is charge asymmetric we find that the system is not locallyneutral and that a non-zero potential difference builds up between anyelectrode and the interior of the system although both electrodes are grounded.Comment: 16 pages, 5 figures, added a new appendix B and a discussion on ideal  conductors vs. good conductor

Description beyond the mean-field approximation of an electrolyte confined between two planar metallic electrodes