Phys. Rev. E 49, R3584 - R3586 (1994)Conformation of a single polyelectrolyte chain in the Coulombic unscreened limit |
José Luis Alessandrini
Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 67, 1900 La Plata, Argentina
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, 1900 La Plata, Argentina
Jorge Vila
Instituto de Matemática Aplicada San Luis, Universidad Nacional de San Luis, Consejo Nacional de Investigaciones Científicas y Técnicas, Ejército de los Andes 950, 5700 San Luis, Argentina
Received 16 November 1993
The dimensions of single polyelectrolyte chains of increasing length are investigated with off lattice Monte Carlo simulations. It is found that the expansion factor of the mean square end to end distance αR2 scales with uN3/2 for chain lengths N between 10 and 100 in the whole range of the adimensional electrostatic coupling constant U. The agreement with the predictions of the mean field theory of dilute polyelectrolyte solutions in a θ solvent without added salt is discussed. The scaling laws are verified by our experiments, which suggest also the scaling behavior of the ‘‘shape’’ of the chains.
©1994 The American Physical Society
URL: http://link.aps.org/abstract/PRE/v49/pR3584
DOI: 10.1103/PhysRevE.49.R3584
PACS: 36.20.-r, 61.25.Hq
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