在浓缩表面活性剂相中无籽合成八面体金纳米颗粒。

Seedless synthesis of octahedral gold nanoparticles in condensed surfactant phase.

作者信息

Cao Cuong, Park Sungho, Sim Sang Jun

机构信息

Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, South Korea.

出版信息

J Colloid Interface Sci. 2008 Jun 1;322(1):152-7. doi: 10.1016/j.jcis.2008.03.031. Epub 2008 Mar 20.

DOI:10.1016/j.jcis.2008.03.031

PMID:18395217

Abstract

We report a seedless synthetic method of gold octahedral nanoparticles in an aqueous phase. Eight facets with {111} crystalline structures of octahedral nanoparticles could be formed in an aqueous medium when the gold salt was reduced by ascorbic acid at room temperature in the presence of cetyltrimethylammonium bromide as a shape-inducing agent, and hydrogen peroxide as a reaction promoter. The growth kinetics and surface crystalline structures were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy.

摘要

我们报道了一种在水相中合成无籽八面体金纳米粒子的方法。当在十六烷基三甲基溴化铵作为形状诱导剂和过氧化氢作为反应促进剂的存在下，在室温下用抗坏血酸还原金盐时，八面体纳米粒子的具有{111}晶体结构的八个面可以在水介质中形成。通过紫外可见光谱、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和X射线光电子能谱对生长动力学和表面晶体结构进行了表征。