DOI: 10.1063/1.437340. The Poisson–Boltzmann equation and its application to polyelectrolytes

The Poisson–Boltzmann equation and its application to polyelectrolytes

10.1063/1.437340

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The validity of the Poisson–Boltzmann (PB) equation is reconsidered on the basis of functional expansion techniques supplemented by the mean spherical approximation. In the application of greatest interest a strong Coulomb potential originating in an external source, such as a polyelectrolyte molecule, acts on a salt solution of small mobile ions. Where the local charge density of mobile ions is high, substantial errors may occur in the PB approximation that relates charge density to mean potential. However, the solution to the PB equation is nevertheless a good approximation in the indicated application because a quite small percentage change in the electrostatic potential can compensate large errors in the Boltzmann distribution. An application to DNA illustrates this compensation, and also its impending failure at bulk salt concentrations in excess of 0.1M. A two phase (or condensation) model is derived as an approximation to the PB equation and retains fair accuracy even at substantial salt concentrations, where the limiting laws lose theoretical validity.

Bibliography

Fixman, M. (1979). The PoissonâBoltzmann equation and its application to polyelectrolytes. The Journal of Chemical Physics, 70(11), 4995â5005.

Authors 1

Marshall Fixman (first)

References 29 Referenced 256

{'key': '2024020917522423200_r1'}
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Dates

Type	When
Created	22 years, 5 months ago (Feb. 27, 2003, 5:52 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 2:51 p.m.)
Indexed	1 month, 2 weeks ago (July 2, 2025, 4:09 p.m.)
Issued	46 years, 2 months ago (June 1, 1979)
Published	46 years, 2 months ago (June 1, 1979)
Published Print	46 years, 2 months ago (June 1, 1979)

Funders 0

None

BibTeX

@article{Fixman_1979, title={The Poisson–Boltzmann equation and its application to polyelectrolytes}, volume={70}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.437340}, DOI={10.1063/1.437340}, number={11}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Fixman, Marshall}, year={1979}, month=jun, pages={4995–5005} }

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