Ionic Capillary Evaporation in Weakly Charged Nanopores

Details Ionic Capillary Evaporation in Weakly Charged Nanopores Ionic Capillary Evaporation in Weakly Charged Nanopores

2010-04-11

arxiv.org/abs/1004.1816v2

Phys. Rev. Lett. 105, 158103 (2010)

Physics

Condensed Matter

Soft Condensed Matter

This version is accepted for publication in PRL

Scientific paper

Using a variational field theory, we show that an electrolyte confined to a neutral cylindrical nanopore traversing a low dielectric membrane exhibits a first-order ionic liquid-vapor pseudo-phase-transition from an ionic-penetration "liquid" phase to an ionic-exclusion "vapor" phase, controlled by nanopore-modified ionic correlations and dielectric repulsion. For weakly charged nanopores, this pseudotransition survives and may shed light on the mechanism behind the rapid switching of nanopore conductivity observed in experiments.

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