计数负载于表面、单层保护的金纳米簇中的原子。
Counting the atoms in supported, monolayer-protected gold clusters.
机构信息
Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom.
出版信息
J Am Chem Soc. 2010 Mar 10;132(9):2854-5. doi: 10.1021/ja909598g.
Mass spectrometry of supported, monolayer-protected, nominally Au(38) (MP-Au(38)) clusters is performed via quantitative High Angle Annular Dark Field-Scanning Transmission Electron Microscopy (HAADF-STEM) using size-selected Au(N) clusters (N = 25, 38, 55) as mass standards. With the intensity due to the (presumed) 24 hexanethiolate ligands taken into account, the clusters are found to contain 38 +/- 2 Au atoms. The method may also be used to determine the degree of aggregation of deposited nanoparticles.
采用经过尺寸筛选的 Au(N) 团簇（N = 25、38、55）作为质量标准，通过定量高角度环形暗场扫描透射电子显微镜（HAADF-STEM）对负载的、单分子层保护的标称 Au(38)（MP-Au(38)）团簇进行质谱分析。考虑到（假定的）24 个己硫醇配体的强度，发现这些团簇含有 38 +/- 2 个金原子。该方法也可用于确定沉积纳米颗粒的聚集程度。
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