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Updated: Feb 13, 2026

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Interacción de nanopartículas cargadas en suspensiones desionizadas

Alexandre P Dos Santos¹, Yan Levin¹

¹Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970 Porto Alegre, RS, Brazil.

The Journal of chemical physics

|February 12, 2026

Abstract:

We develop a theoretical framework to calculate the interaction potential between charged nanoparticles in monovalent deionized suspensions. The approach is based on the renormalized Jellium (rJellium) model, which provides the effective charge governing the far-field behavior of the Derjaguin, Landau, Verwey, and Overbeek (DLVO) potential. For short interparticle separations, we combine rJellium with the modified Derjaguin approximation, explicitly accounting for local violations of charge neutrality while imposing a constant-charge boundary condition on the Derjaguin surfaces. The theoretical predictions are systematically compared with Monte Carlo simulations, where the infinite system size is treated using Ewald summation. We find excellent quantitative agreement across all separations, surface charge densities, colloidal volume fractions, and particle sizes-without any adjustable parameters.

Palabras clave:

nanopartículas cargadas suspensiones desionizadas modelo rJellium potenciales de interacción simulaciones

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