Effect of counterion distribution on the electrostatic component of the persistence length of flexible linear polyions

Debbie Klearman; Kenneth S. Schmitz

doi:10.1117/12.44171

1 June 1991 Effect of counterion distribution on the electrostatic component of the persistence length of flexible linear polyions

Debbie Klearman, Kenneth S. Schmitz

Author Affiliations +

Proceedings Volume 1430, Photon Correlation Spectroscopy: Multicomponent Systems; (1991) https://doi.org/10.1117/12.44171
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

We examine in more detail the "three-region" model recently proposed to explain the dependence of the persistence length of linear polyions as a function of small ion concentration under low ionic conditions. The three regions approximated as step functions are: (1) "condensed counterions" on the surface of the polyion whose function is simply to reduce the effective charge of each polyion site; (2) a counterion sheath in the vicinity of the polyion that may extend tens of angstroms from the polyion surface; and (3) the "bulk" solution concentration. Incorporated in this model is the property that the concentration of ions in region (2) increases relative to the concentration of ions in region (3) as the polyion concentration is decreased.

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Debbie Klearman and Kenneth S. Schmitz "Effect of counterion distribution on the electrostatic component of the persistence length of flexible linear polyions", Proc. SPIE 1430, Photon Correlation Spectroscopy: Multicomponent Systems, (1 June 1991); https://doi.org/10.1117/12.44171

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