The influence of ionic dispersion potentials on counterion condensation on polyelectrolytes

Mathias Boström; David R.M. Williams; Barry W. Ninham

doi:10.1021/jp0256084

The influence of ionic dispersion potentials on counterion condensation on polyelectrolytes

Mathias Boström^*, David R.M. Williams, Barry W. Ninham

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

Abstract

The prevalent theories for polyelectrolytes have not been able to describe the experimentally observed ion specificity found at high ion concentrations for counterion condensation and conformational transitions. One important source of ion specificity missed in these theories is the dispersion force that acts between an ion and the cylindrical polyion surface. Here, we solve the cylindrical Poisson-Boltzmann equation numerically in the presence of ionic dispersion potentials. We demonstrate that ionic dispersion forces have important influences on ionic distributions and potentials. This influence increases with increasing concentration reflecting that specific ion effects are observed only at high concentrations.

Original language	English
Pages (from-to)	7908-7912
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	32
DOIs	https://doi.org/10.1021/jp0256084
Publication status	Published - 15 Aug 2002

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abstract = "The prevalent theories for polyelectrolytes have not been able to describe the experimentally observed ion specificity found at high ion concentrations for counterion condensation and conformational transitions. One important source of ion specificity missed in these theories is the dispersion force that acts between an ion and the cylindrical polyion surface. Here, we solve the cylindrical Poisson-Boltzmann equation numerically in the presence of ionic dispersion potentials. We demonstrate that ionic dispersion forces have important influences on ionic distributions and potentials. This influence increases with increasing concentration reflecting that specific ion effects are observed only at high concentrations.",

author = "Mathias Bostr{\"o}m and Williams, {David R.M.} and Ninham, {Barry W.}",

year = "2002",

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AU - Boström, Mathias

AU - Williams, David R.M.

AU - Ninham, Barry W.

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Y1 - 2002/8/15

N2 - The prevalent theories for polyelectrolytes have not been able to describe the experimentally observed ion specificity found at high ion concentrations for counterion condensation and conformational transitions. One important source of ion specificity missed in these theories is the dispersion force that acts between an ion and the cylindrical polyion surface. Here, we solve the cylindrical Poisson-Boltzmann equation numerically in the presence of ionic dispersion potentials. We demonstrate that ionic dispersion forces have important influences on ionic distributions and potentials. This influence increases with increasing concentration reflecting that specific ion effects are observed only at high concentrations.

AB - The prevalent theories for polyelectrolytes have not been able to describe the experimentally observed ion specificity found at high ion concentrations for counterion condensation and conformational transitions. One important source of ion specificity missed in these theories is the dispersion force that acts between an ion and the cylindrical polyion surface. Here, we solve the cylindrical Poisson-Boltzmann equation numerically in the presence of ionic dispersion potentials. We demonstrate that ionic dispersion forces have important influences on ionic distributions and potentials. This influence increases with increasing concentration reflecting that specific ion effects are observed only at high concentrations.

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U2 - 10.1021/jp0256084

DO - 10.1021/jp0256084

M3 - Article

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VL - 106

SP - 7908

EP - 7912

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 32

ER -

The influence of ionic dispersion potentials on counterion condensation on polyelectrolytes

Abstract

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