Determination of Nanocluster Sizes from Dark-Field Scanning Transmission Electron Microscopy Images
Determination of Nanocluster Sizes from Dark-Field Scanning Transmission Electron Microscopy Images
复制标题
DOI：
10.1021/jp710959x
复制
发表时间：
2008-01
影响因子：
3.7
通讯作者：
N. Okamoto;B. Reed;S. Mehraeen;Apoorva Kulkarni;D. G. Morgan;B. Gates;N. Browning
中科院分区：
文献类型：
--
作者：
N. Okamoto;B. Reed;S. Mehraeen;Apoorva Kulkarni;D. G. Morgan;B. Gates;N. Browning
介绍了一种利用扫描透射电子显微镜中的高角度环形暗场成像测定纳米团簇尺寸和尺寸分布的新方法。通过在CO中处理Os3（CO）12前体形成的MgO负载的[Os 10 C（CO）24]2-簇证明了该方法。图像分析确定了Os3（CO）12前体和[Os 10 C（CO）24]2-簇的存在，并达到预期的比例（与基于其晶体学确定的结构计算的尺寸匹配的尺寸在6%以内）以及可以容易地被识别为先前集群的组合的较大集群。
A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os10C(CO)24]2- clusters formed by treating Os3(CO)12 precursors in CO. The image analysis identified the presence of both Os3(CO)12 precursors and [Os10C(CO)24]2- clusters in the expected ratio (with the sizes matching those calculated on the basis of their crystallographically determined structures within 6%) and also larger clusters that can be readily identified as combinations of the former clusters.