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Updated: May 10, 2026

Assembly and Characterization of Polyelectrolyte Complex Micelles
Published on: March 2, 2020
Adsorption of polyelectrolytes onto oppositely charged cylindrical macroions
Sidney Jurado de Carvalho1, Daniel Lucas Zago Caetano
1Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, UNESP-Univ Estadual Paulista, Rua Cristovão Colombo 2265, Jd. Nazareth 15054-000, São José do Rio Preto, São Paulo, Brazil.
Abstract:
In this work we investigate the adsorption of polyelectrolyte chains onto uniformly charged cylindrical macroions by means of the Metropolis Monte Carlo simulations and weighted histogram analysis method. Adopting a simplified model for macromolecules and treating the electrolytic solution in the Debye-Hückel level, conformational properties of the adsorbed chain, such as the radius of gyration and the thickness of the adsorbed layer, are provided as a function of ionic strength and macroion charge density. By analysis of the free energy profile as a function of the radius of gyration it was possible to identify first-order-like transitions between adsorbed and desorbed states and obtain a macroion charge density dependence of the critical ionic strength in good agreement with experiments.
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