Radial distribution function of rod-like polyelectrolytesR. Zandi1, J. Rudnick2 and R. Golestanian3
1 Department of Chemistry and Biochemistry, UCLA, Box 951569, Los Angeles, CA 90095-1569, USA
2 Department of Physics and Astronomy, UCLA, Box 951547, Los Angeles, CA 90095-1547, USA
3 Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159, Iran, Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran, Iran
(Received 4 March 2002 and Received in final form 1 July 2002 / Published online: 22 November 2002)
We study the effect of electrostatic interactions on the distribution function of the end-to-end distance of a single polyelectrolyte chain in the rod-like limit. The extent to which the radial distribution function of a polyelectrolyte is reproduced by that of a wormlike chain with an adjusted effective persistence length is investigated. Strong evidence is found for a universal scaling formula connecting the effective persistence length of a polyelectrolyte with the strength of the electrostatic interaction and the Debye screening length.
82.35.Rs - Polyelectrolytes.
87.15.La - Mechanical properties.
36.20.-r - Macromolecules and polymer molecules.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2002