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Article Dans Une Revue Journal of Physical Chemistry C Année : 2013

Nanoconfined Electrolyte Solutions in porous Hydrophilic Silica Membranes.

Richard Renou
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Aziz Ghoufi
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H. Zhu
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Jean-Claude Neyt
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Patrice Malfreyt

Résumé

Manipulating of electrolyte solutions is ubiquitous in numerous fields ranging from condensed to soft matter. The fundamental understanding of the molecular mechanism ruling the macroscopic properties is inescapable to well rationalize the engineering processes. In confined situations such as nanofluidic or nanofiltration, interactions between the fluids and the surface drastically modify the usual macroscopic properties. In this work we addressed a structural and dielectric analysis of confined NaCl, NaI, MgCl2, and Na2SO4 in nanoporous hydrophilic silica membranes. We highlight a dielectric anisotropy of confined water and an unusual increase in the radial component of permittivity (ε) of confined solutions with respect to the decrease in ε in the bulk solution phase. Structurally, we investigate the size, the polarizability, and the salt effect on water confinement and ions translocation through a cylindrical silica nanopore.
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Dates et versions

hal-00828106 , version 1 (30-05-2013)

Identifiants

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Richard Renou, Aziz Ghoufi, Anthony Szymczyk, H. Zhu, Jean-Claude Neyt, et al.. Nanoconfined Electrolyte Solutions in porous Hydrophilic Silica Membranes.. Journal of Physical Chemistry C, 2013, 117 (21), pp.11017-11027. ⟨10.1021/jp403450x⟩. ⟨hal-00828106⟩
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