Nanoions: Fundamental properties and analytical applications of charged nanoparticles

被引：53

作者：

Bishop, Kyle J. M.

Grzybowski, Bartosz A.

机构：

[1] Northwestern Univ, Dept Chem & Biol Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

CHEMPHYSCHEM | 2007年 / 8卷 / 15期

关键词：

analytical methods; charge measurements; colloids; electrostatic interactions; nanoparticles;

D O I：

10.1002/cphc.200700349

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：

Mixtures of oppositely charged nanoporticles (NPs) precipitate sharply only at the point of NP electroneutrality. This behavior-reminiscent of the threshold precipitation of inorganic ions-is specific to the nonoscale and con be attributed to the formation of like-chorged NP clusters stabilized in solution by mutual electrostatic repulsions. NP titrations based on this phenomenon provide a uniquely accurate tool for measuring charges tethered onto nonoscopic objects and for studying the thermodynamics of surface reactions at the nonoscole.

引用

收藏

页码：2171 / 2176

页数：6

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