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arXiv · 2303.14846

Dielectric properties of aqueous electrolytes at the nanoscale

Maximilian R. Becker·Philip Loche·Douwe Jan Bonthuis·Dominique Mouhanna·Roland R. Netz·Hélène Berthoumieux
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Abstract

Despite the ubiquity of aqueous electrolytes, the effect of salt on water organization remains controversial. We introduce a nonlocal and nonlinear field theory for the nanoscale polarization of ions and water and derive the electrolyte dielectric response as a function of salt concentration to first order in a loop expansion. By comparison with molecular dynamics simulations, we show that rising salt concentration induces a dielectric permittivity decrement and Debye screening in the longitudinal susceptibility but leaves the water structure remarkably unchanged.

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Maximilian R. Becker, Philip Loche, Douwe Jan Bonthuis, Dominique Mouhanna, Roland R. Netz, Hélène Berthoumieux. 2023-03-26. Dielectric properties of aqueous electrolytes at the nanoscale. https://arxiv.org/abs/2303.14846

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