Overcharging by macroions: above all, an entropy effect

Details Overcharging by macroions: above all, an entropy effect Overcharging by macroions: above all, an entropy effect

2001-05-15

arxiv.org/abs/physics/0105043v2

Physics

Chemical Physics

4 pages, 5 figures

Scientific paper

Model macroion solutions next to a charged wall show interface \textit{true overcharging}, charge reversal and inversion, and layering. Macroion layering is present, even if the wall or the macroparticle are \textit{uncharged} or if the wall and macroions are like-charged. An effective long-range attractive force between the adsorbed macroions is implied. The results are obtained through an integral equation theory and a new extended Poisson-Boltzmann theory, and are in accordance with experiments on confined macroions and polymer layering.

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