Modified Poisson–Boltzmann equations and macroscopic forces in inhomogeneous ionic fluids
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.
Citations by journals
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Journal of Chemical Physics
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Journal of Chemical Physics
3 publications, 17.65%
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Physics of Fluids
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Physics of Fluids
1 publication, 5.88%
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Physical Review E
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Physical Review E
1 publication, 5.88%
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Europhysics Letters
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Europhysics Letters
1 publication, 5.88%
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International Journal of Computational Methods
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International Journal of Computational Methods
1 publication, 5.88%
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Journal of Physics A: Mathematical and Theoretical
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Journal of Physics A: Mathematical and Theoretical
1 publication, 5.88%
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Physical Review Letters
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Physical Review Letters
1 publication, 5.88%
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Macromolecules
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Macromolecules
1 publication, 5.88%
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Polymer Science - Series C
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Polymer Science - Series C
1 publication, 5.88%
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European Physical Journal E
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European Physical Journal E
1 publication, 5.88%
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Journal of Statistical Mechanics: Theory and Experiment
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Journal of Statistical Mechanics: Theory and Experiment
1 publication, 5.88%
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Journal of Physical Chemistry B
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Journal of Physical Chemistry B
1 publication, 5.88%
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Communications Physics
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Communications Physics
1 publication, 5.88%
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Journal of Physics Condensed Matter
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Journal of Physics Condensed Matter
1 publication, 5.88%
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Journal of Chemical & Engineering Data
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Journal of Chemical & Engineering Data
1 publication, 5.88%
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Citations by publishers
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American Institute of Physics (AIP)
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American Institute of Physics (AIP)
4 publications, 23.53%
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IOP Publishing
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IOP Publishing
4 publications, 23.53%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
3 publications, 17.65%
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American Physical Society (APS)
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American Physical Society (APS)
2 publications, 11.76%
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Springer Nature
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Springer Nature
2 publications, 11.76%
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World Scientific
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World Scientific
1 publication, 5.88%
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Pleiades Publishing
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Pleiades Publishing
1 publication, 5.88%
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