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Phys Rev Lett. 2006 Jan 27;96(3):038302. Epub 2006 Jan 24.

Onsager-Manning-Oosawa condensation phenomenon and the effect of salt.

Author information

1
Theoretical Biological Physics, UCSD, La Jolla, California 92093, USA.

Abstract

Making use of results pertaining to Painlevé III type equations, we revisit the celebrated Onsager-Manning-Oosawa condensation phenomenon for charged stiff linear polymers, in the mean-field approximation with salt. We obtain analytically the associated critical line charge density and show that it is severely affected by finite salt effects, whereas previous results focused on the no salt limit. In addition, we obtain explicit expressions for the condensate thickness and the electric potential. The case of asymmetric electrolytes is also briefly addressed.

PMID:
16486779
DOI:
10.1103/PhysRevLett.96.038302
[Indexed for MEDLINE]

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