Ion-ion correlation and charge reversal at titrating solid interfaces

Autor:	Labbez, Christophe, Jonsson, Bo, Skarba, Michal, Borkovec, Michal
Rok vydání:	2008
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
Popis:	Confronting grand canonical titration Monte Carlo simulations (MC) with recently published titration and charge reversal (CR) experiments on silica surfaces by Dove et al. and van der Heyden it et al, we show that ion-ion correlations quantitatively explain why divalent counterions strongly promote surface charge which, in turn, eventually causes a charge reversal (CR). Titration and CR results from simulations and experiments are in excellent agreement without any fitting parameters. This is the first unambiguous evidence that ion-ion correlations are instrumental in the creation of highly charged surfaces and responsible for their CR. Finally, we show that charge correlations result in "anomalous" charge regulation in strongly coupled conditions in qualitative desagreement with its classical treatment. Comment: 4 pages, 4 figures, submitted to PRL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0812.0300 Zobrazit plný text záznamu View this record from Arxiv