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42
Ha Noi Metroplolitan University
THE PHENOMENA OF CHARGE INVERSION
AND EFFECTIVE ATTRACTION BETWEEN
THE SPHERICAL MACROMOLECULES IN ELECTROLYTE SOLVENT
Nguyen Vu Nhan1, Nguyen Viet Duc2, Toan T. Nguyen2
1
Hanoi Metropolitan University
2
Key Laboratory for Multiscale Simulation of Complex Systems,
VNU University of Science, Vietnam National University
Abstract: The phenomena of charge inversion and effective attraction between the like charged spherical macromolecules in electrolyte solvent has been studied by using
Poisson - Boltzmann mean-field theory, alongside the assumption that counterions
condense on the surface of macromolecules to form a strongly correlation liquid. This
oversimplified model is able to capture many important features of these phenomena,
provide essential understanding of electrostatics in strong interaction regime in
biological and soft matter systems.
Keywords: Charge inversion, like-charged attraction, polyelectrolyte solution, Poisson Boltzmann equation, biological macromolecule.
Email:
Received 16 October 2019
Accepted for publication 15 November 2019
1. INTRODUCTION
In recent years, the there are many researches on physical properties of biological and
soft maters macro-molecules, such as colloidal particles, vesicles, micelles, proteins,
DNA… Insightly knowledge about structure and also interaction of biological molecules is
essential to understand biological processes [1]. Most of these systems function in aqueous
solution in the presence of many electrolytes such as NaCl, MgCl2… Standard theoretical
and computational approaches to understand the electrostatics of these system has been