Sonochemical synthesis of well-dispersed gold nanoparticles at the ice temperature

被引：78

作者：

Su, CH ^{[1
]}

Wu, PL ^{[1
]}

Yeh, CS ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Chem, Tainan 701, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 51期

关键词：

D O I：

10.1021/jp035451v

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 newly modified sonochemical approach was demonstrated to synthesize stable Au suspensions. The formation of Au nanoparticles with diameters of similar to20 nm was accomplished through the ultrasonic irradiation of aqueous HAuCl4 solutions containing trisodium citrate at 4 degreesC. The efficient generation in gold particles only occurred when the sufficient citrate concentrations (1.9, 2.9, and 3.9 mM) were reached. At low citrate concentrations ranging from 0.49 to 1.5 mM, large aggregates of coalesced Au particles were observed as sonication time increased. It is proposed that citrate could transform as the reducing radicals, 1,2,3-tricarboxy-2-propyl radicals, for the AuCl4 reduction and might also act as the stabilizer during particles formation.

引用

页码：14240 / 14243

页数：4

共 20 条

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