Simulation of charge reversal in salty environments: Giant overcharging?

2007/11/30 by Olaf Lenz, Christian Holm · 2 citations
Chemistry · Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Electrostatics and Colloid Interactions #Geophysical and Geoelectrical Methods #Microfluidic and Bio-sensing Technologies #cond-mat.soft

paper · pdf · doi:10.1140/epje/i2007-10260-x

published as Eur. Phys. J. E 26, p.191-195 (2008) · Replaced b&w figures by color figures for the online version

arxiv created 2007/12/20 · openalex publication_date 2008/02/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have performed MD simulations of a highly charged colloid in a solution of 3:1 and additional 1:1 salt. The dependency of the colloid's inverted charge on the concentration of the additional 1:1 salt has been studied. Most theories predict, that the inverted charge increases when the concentration of monovalent salt grows, up to what is called giant overcharging, while experiments and simulational studies observe the opposite. Our simulations agree with the experimental findings and shed light onto the weaknesses of the theories.

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