The hydrophobic effect as a driving force for charge inversion in colloids

被引：37

作者：

Martin-Molina, Alberto ^{[2
]}

Calero, Carles ^{[1
]}

Faraudo, Jordi ^{[1
]}

Quesada-Perez, Manuel ^{[3
]}

Travesset, Alex ^{[4
,5
]}

Alvarez, Roque Hidalgo- ^{[2
]}

机构：

[1] CSIC, Inst Ciencia Mat Barcelona, E-08193 Bellaterra, Spain

[2] Univ Granada, Dpto Fis Aplicada, Grp Fis Fluidos & Biocoloides, E-18071 Granada, Spain

[3] Univ Jaen, Escuela Politecn Super, Dept Fis, Jaen 23700, Spain

[4] Iowa State Univ, Dept Phys, Ames, IA 50011 USA

[5] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

SOFT MATTER | 2009年 / 5卷 / 07期

关键词：

MULTIVALENT IONS; DOUBLE-LAYER; SIMULATIONS; REVERSAL; WATER; MODEL; ELECTROLYTES; MACROIONS; PARTICLE; SOLVENTS;

D O I：

10.1039/b820489f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new mechanism for charge inversion of colloids in electrolyte solutions based on the hydrophobic effect is presented. We show that this mechanism is able to induce charge inversion at low concentrations (similar to mM) of monovalent ions containing hydrophobic functional groups and present for the first time experimental evidence of this prediction. We provide a simple mean field theoretical model that successfully describes the experimental data up to charge inversion. Saturation effects appearing at higher concentrations are also discussed.

引用

页码：1350 / 1353

页数：4

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