Journal of Statistical Mechanics: Theory and Experiment, volume 2022, issue 5, pages 53205

Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids

Kolesnikov Andrei L
Publication typeJournal Article
Publication date2022-05-01
Quartile SCImago
Q2
Quartile WOS
Q1
Impact factor2.4
ISSN17425468
Statistical and Nonlinear Physics
Statistics and Probability
Statistics, Probability and Uncertainty
Abstract

We propose a field-theoretical approach based on the thermodynamic perturbation theory and within it derive a grand thermodynamic potential of the inhomogeneous ionic fluid as a functional of electrostatic potential for an arbitrary reference fluid system. We obtain a modified Poisson–Boltzmann (PB) equation as the Euler–Lagrange equation for the obtained functional. Applying Noether’s theorem to this functional, we derive a general mean-field expression for the stress tensor consistent with the respective modified PB equation. We derive a general expression for the macroscopic force acting on the dielectric or conductive body immersed in an ionic fluid. In particular, we derive a general mean-field expression for the disjoining pressure of an ionic fluid in a slit pore. We apply the developed formalism to describe three ionic fluid models of practical importance: nonpolarizable models (including the well-known PB and Poisson–Fermi equations), polarizable models (ions carry nonzero permanent dipole or static polarizability), and models of ion-dipole mixtures (including the well-known PB–Langevin equation). For these models, we obtain modified PB equations and respective stress tensors, which could be valuable for different applications, where it is necessary to estimate the macroscopic forces acting on the dielectric or conductive bodies (electrodes, colloids, membranes, etc) together with the local electrostatic potential (field) and ionic concentrations.

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Budkov Y. A., Kolesnikov A. L. Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids // Journal of Statistical Mechanics: Theory and Experiment. 2022. Vol. 2022. No. 5. p. 53205.
GOST all authors (up to 50) Copy
Budkov Y. A., Kolesnikov A. L. Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids // Journal of Statistical Mechanics: Theory and Experiment. 2022. Vol. 2022. No. 5. p. 53205.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1088/1742-5468/ac6a5b
UR - https://doi.org/10.1088%2F1742-5468%2Fac6a5b
TI - Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids
T2 - Journal of Statistical Mechanics: Theory and Experiment
AU - Budkov, Yury A
AU - Kolesnikov, Andrei L
PY - 2022
DA - 2022/05/01 00:00:00
PB - IOP Publishing
SP - 53205
IS - 5
VL - 2022
SN - 1742-5468
ER -
BibTex |
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BibTex Copy
@article{2022_Budkov,
author = {Yury A Budkov and Andrei L Kolesnikov},
title = {Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids},
journal = {Journal of Statistical Mechanics: Theory and Experiment},
year = {2022},
volume = {2022},
publisher = {IOP Publishing},
month = {may},
url = {https://doi.org/10.1088%2F1742-5468%2Fac6a5b},
number = {5},
pages = {53205},
doi = {10.1088/1742-5468/ac6a5b}
}
MLA
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MLA Copy
Budkov, Yury A., and Andrei L Kolesnikov. “Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids.” Journal of Statistical Mechanics: Theory and Experiment, vol. 2022, no. 5, May. 2022, p. 53205. https://doi.org/10.1088%2F1742-5468%2Fac6a5b.
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