Critical adsorption of polyelectrolytes onto highly oppositely charged surfaces: Effects of charge renormalization DOI
Felipe Arantes Africo, Andrey G. Cherstvy, Sidney J. de Carvalho

и другие.

The Journal of Chemical Physics, Год журнала: 2024, Номер 161(19)

Опубликована: Ноя. 21, 2024

The critical adsorption conditions of polyelectrolytes (PEs) onto planar, cylindrical, and spherical surfaces were obtained by solving the Edwards equation using Wentzel–Kramers–Brillouin (WKB) method. It demonstrated to provide a suitable analytical approach for all three geometries, in conformity with some experimental results weakly charged micelles. However, our Monte Carlo simulations implementing approximate solutions nonlinear Poisson–Boltzmann highly indicated recently emergence limiting value ionic strength due dependence electrostatic (ES) potential on surface-charge density σ. Beyond this strength, PE no longer occurs, shifting standard paradigm. In work, we employ concept renormalized charge use WKB method study effects nonlinearity conditions, profile, adsorbed layer segments, comparison linear Debye–Hückel (DH) approach. Charge renormalization makes it possible known DH regime also high σ, introducing saturation effect observed case. larger ES screening affects profile PEs, promoting more dispersed distribution PEs at higher densities. Our curve reproduce σ recover low

Язык: Английский

Critical adsorption of polyelectrolytes onto highly oppositely charged surfaces: Effects of charge renormalization DOI
Felipe Arantes Africo, Andrey G. Cherstvy, Sidney J. de Carvalho

и другие.

The Journal of Chemical Physics, Год журнала: 2024, Номер 161(19)

Опубликована: Ноя. 21, 2024

The critical adsorption conditions of polyelectrolytes (PEs) onto planar, cylindrical, and spherical surfaces were obtained by solving the Edwards equation using Wentzel–Kramers–Brillouin (WKB) method. It demonstrated to provide a suitable analytical approach for all three geometries, in conformity with some experimental results weakly charged micelles. However, our Monte Carlo simulations implementing approximate solutions nonlinear Poisson–Boltzmann highly indicated recently emergence limiting value ionic strength due dependence electrostatic (ES) potential on surface-charge density σ. Beyond this strength, PE no longer occurs, shifting standard paradigm. In work, we employ concept renormalized charge use WKB method study effects nonlinearity conditions, profile, adsorbed layer segments, comparison linear Debye–Hückel (DH) approach. Charge renormalization makes it possible known DH regime also high σ, introducing saturation effect observed case. larger ES screening affects profile PEs, promoting more dispersed distribution PEs at higher densities. Our curve reproduce σ recover low

Язык: Английский

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