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Chemically Selective Imaging of Individual Bonds through Scanning Electron Energy-Loss Spectroscopy: Disulfide Bridges Linking Gold Nanoclusters.
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-01-17 , DOI: 10.1021/acs.jpclett.9b03496
Karolina Sokołowska 1 , Zhongyue Luan 2 , Eero Hulkko 1, 3 , Christoph Rameshan 4 , Noelia Barrabés 4 , Vartkess A Apkarian 5 , Tanja Lahtinen 1
Affiliation  

As proof-of-principle of chemically selective, spatially resolved imaging of individual bonds, we carry out electron energy-loss spectroscopy in a scanning transmission electron microscopy instrument on atomically precise, thiolate-coated gold nanoclusters linked with 5,5'-bis(mercaptomethyl)-2,2'-bipyridine dithiol ligands. The images allow the identification of bridging disulfide bonds (R-S-S-R) between clusters, and X-ray photoelectron spectra support the finding.

中文翻译:

通过扫描电子能量损失谱法对各个键的化学选择性成像:连接金纳米团簇的二硫键。

作为单个键化学选择性的空间分辨成像的原理证明,我们在扫描透射电子显微镜仪器上对与5,5'-bis(5,5'-bis()连接的原子精确的硫醇盐涂层金纳米团簇进行了电子能量损失谱分析。巯基甲基)-2,2′-联吡啶二硫醇配体。这些图像可以识别簇之间的桥接二硫键(RSSR),并且X射线光电子能谱支持这一发现。
更新日期:2020-01-17
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