Preparation of gold-, gold/silver-dendrimer nanocomposites in the presence of benzoin in ethanol by UV irradiation

被引：51

作者：

Esumi, K ^{[1
]}

Matsumoto, T

Seto, Y

Yoshimura, T

机构：

[1] Tokyo Univ Sci, Dept Appl Chem, Shinjuku Ku, Tokyo 1628601, Japan

[2] Tokyo Univ Sci, Inst Colloid & Interface Sci, Shinjuku Ku, Tokyo 1628601, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 284卷 / 01期

关键词：

gold-dendrimer nanocomposite; gold/silver-dendrimer nanocomposites; UV irradiation; benzoin;

D O I：

10.1016/j.jcis.2004.09.020

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：

Gold- and gold/silver-dendrimer nanocomposites have been synthesized by UV irradiation of their salts dissolved in ethanol containing dendrimers. As dendrimers, poly(amidomaine) PAMAM dendrimers and poly(propyleneimine) PPI dendrimers of various generations were used, The photoreduction of their salts is greatly accelerated by using benzoin as a photoinitiator. The sizes of gold in the nanocomposites are affected by the concentration of benzoin as well as the concentration of dendrimers, but are hardly changed with the kind of dendrimers. For gold/silver-dendrimer nanocomposites, the absorption spectra of gold/silver nanoparticles in the nanocomposites are very similar to the theoretical spectra of gold/silver alloy nanoparticles, suggesting the formation of gold/silver alloy nanoparticles. From the comparison of TEM and DLS measurements, it is found that the metal-dendrimer nanocomposites consist of metal nanoparticles covering by dendrimer molecules. (c) 2004 Elsevier Inc. All rights reserved.

引用

页码：199 / 203

页数：5

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