文献类型：期刊文献

英文题名：A composition and size controllable approach for Au-Ag alloy nanoparticles

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

年份：2012

卷号：7

外文期刊名：NANOSCALE RESEARCH LETTERS

收录：;EI(收录号：20121915013270);WOS:【SCI-EXPANDED(收录号:WOS:000310873000001)】；

基金：Authors appreciated the financial supports from the Fundamental Research Funds for National Nature Science Foundation of China (51172072), the Fundamental Research Funds for the Central Universities (WJ0913001), the Focus of Scientific and Technological Research Projects (109063), and the State Key Laboratory of Chemical Engineering at ECUST (SKL-ChE-08 C09).

语种：英文

外文关键词：Au-Ag alloy; Nanoparticles; Composition; Size; Micro-reaction method

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.