A composition and size controllable approach for Au-Ag alloy nanoparticles

被引：36

作者：

Sun, Li ^{[1
]}

Luan, Weiling ^{[1
]}

Shan, Yue Jin ^{[2
]}

机构：

[1] E China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Safety Sci Pressurized Syst MOE, Shanghai 200237, Peoples R China

[2] Utsunomiya Univ, Dept Appl Chem, Fac Engn, Utsunomiya, Tochigi 3218585, Japan

来源：

NANOSCALE RESEARCH LETTERS | 2012年 / 7卷

关键词：

Au-Ag alloy; Nanoparticles; Composition; Size; Micro-reaction method; SILVER NANOPARTICLES; BIMETALLIC NANOPARTICLES; REPLACEMENT REACTION; GOLD NANOPARTICLES; OPTICAL-PROPERTIES; NANOCRYSTALS; ABSORPTION; OLEYLAMINE; CATALYSIS; OXIDATION;

D O I：

10.1186/1556-276X-7-225

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A capillary micro-reaction was established for the synthesis of Au-Ag alloy nanoparticles (NPs) with a flexible and controllable composition and grain size by tuning the synthesis temperature, the residence time, or the mole ratio of Au3+:Ag+. By extending the residence time from 5 to 900 s, enhancing the temperature from 120 degrees C to 160 degrees C, or decreasing the mole ratio of Au3+:Ag+ from 1:1 to 1:20, the composition of samples was changed continuously from Au-rich to Ag-rich. The particles became large with the increase of the residence time; however, synthesis temperatures showed less effect on the particle size change. The particle size of the Au-Ag alloy NPs with various composition could be kept by adjusting the mole ratio of Au3+:Ag+. TEM observation displayed that the as-obtained NPs were sphere-like with the smallest average size of 4.0 nm, which is half of those obtained by the traditional flask method.

引用

页数：6

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