乙二醇
溶解
分散性
硝酸银
纳米颗粒
材料科学
Crystal(编程语言)
化学工程
氧气
单晶
纳米技术
化学
无机化学
核化学
结晶学
高分子化学
有机化学
物理化学
工程类
程序设计语言
计算机科学
作者
Benjamin J. Wiley,Thurston Herricks,Yugang Sun,Younan Xia
出处
期刊:Nano Letters
[American Chemical Society]
日期:2004-08-07
卷期号:4 (9): 1733-1739
被引量:936
摘要
Single-crystal cubes and tetrahedrons of silver with truncated corners/edges have been prepared for the first time in high yields by reducing silver nitrate with ethylene glycol heated to 148 °C in the presence of poly(vinyl pyrrolidone) and a trace amount of sodium chloride. These nanoparticles were relatively monodisperse in size and shape, and their dimensions could be readily controlled in the range of 20 to 80 nm by varying the reaction time and other experimental parameters. We propose that the defects inherent in twinned nuclei of silver led to their selective etching and dissolution by chloride and oxygen (from air), leaving only the single crystalline ones to grow into nanoscale cubes and tetrahedrons.
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