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Dipolar correlations in structured solvents under nanoconfinement

Abstract : We study electrostatic correlations in structured solvents confined to nanoscale systems. We derive variational equations of Netz-Orland type for a model liquid composed of finite size dipoles. These equations are solved for both dilute solvents and solvents at physiological concentrations in a slit nanopore geometry. Correlation effects are of major importance for the dielectric reduction and anisotropy of the solvent resulting from dipole image interactions and also lead to a reduction of van der Waals attractions between low dielectric bodies. Finally, by comparison with other recently developed self-consistent theories and experiments, we scrutinize the effect of solvent-membrane interactions on the differential capacitance of the charged liquid in contact with low dielectric substrates. The interfacial solvent depletion driven by solvent-image interactions plays the major role in the observed low values of the experimental capacitance data, while non-locality associated with the extended charge structure of solvent molecules only brings a minor contribution.
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https://hal.univ-lille.fr/hal-03220420
Contributeur : Lilloa Université de Lille <>
Soumis le : vendredi 7 mai 2021 - 11:00:45
Dernière modification le : mardi 18 mai 2021 - 11:06:05

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Sahin Buyukdagli, Ralf Blossey. Dipolar correlations in structured solvents under nanoconfinement. Journal of Chemical Physics, American Institute of Physics, 2014, The Journal of Chemical Physics, 140 (23), pp.234903. ⟨10.1063/1.4881604⟩. ⟨hal-03220420⟩

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