| Autor: |
Avni, Yael, Adar, Ram M., Andelman, David, Orland, Henri |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 128, 098002 (2022) & Suppl. Material |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.128.098002 |
| Popis: |
The conductivity of ionic solutions is arguably their most important trait, being widely used in electrochemical, biochemical, and environmental applications. The Debye-H\"uckel-Onsager theory successfully predicts the conductivity at very low ionic concentrations of up to a few millimolars, but there is no well-established theory applicable at higher concentrations. We study the conductivity of ionic solutions using a stochastic density functional theory, paired with a modified Coulomb interaction that accounts for the hard-core repulsion between the ions. The modified potential suppresses unphysical, short-range electrostatic interactions, which are present in the Debye-H\"uckel-Onsager theory. Our results for the conductivity show very good agreement with experimental data up to 3 molars, without any fit parameters. We provide a compact expression for the conductivity, accompanied by a simple analytical approximation. |
| Databáze: |
arXiv |
| Externí odkaz: |
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