Stabilizer-free nanosized gold sols

被引：91

作者：

Andreescu, Daniel ^{[1
]}

Sau, Tapan Kumar ^{[1
]}

Goia, Dan V. ^{[1
]}

机构：

[1] Clarkson Univ, Ctr Adv Mat Proc, Potsdam, NY 13699 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 298卷 / 02期

基金：

美国国家科学基金会;

关键词：

gold nanoparticles; gold sol; iso-ascorbic acid; plasmon band; stabilizer; tetrachloroauric acid;

D O I：

10.1016/j.jcis.2006.01.011

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：

The paper describes a convenient, rapid, and reproducible method for the synthesis of stable dispersions of uniform gold nanoparticles at ambient temperatures by mixing aqueous solutions of tetrachloroauric acid and iso-ascorbic acid. The influence of the experimental conditions on the size of the gold particles and the stability of the final sols was monitored by dynamic light scattering and UV-vis spectrophotometry. It was found that the size of the resulting nanoparticles is affected by the concentration and the pH of gold solution, while the stability of the electrostatically stabilized final sols is strongly dependent on the excess of reductant in the system, the ionic strength, and the temperature of the precipitation. Since the preparation process does not require the addition of a dispersing agent, the surface of the resulting gold nanoparticles can be easily functionalized to make them suitable for applications in medicine, biology, and catalysis. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：742 / 751

页数：10

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