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Chemically Selective Imaging of Individual Bonds Through Scanning Electron Energy-Loss Spectroscopy: Disulfide Bridges Linking Gold Nanoclusters

Karolina Sokołowska, Zhongyue Luan, Eero Hulkko, Christoph Rameshan, Noelia Barrabés, Vartkess A Apkarian, Tanja Lahtinen

J Phys Chem Lett. 2020 Feb 6;11(3):796-799.

PMID: 31939675

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP894105987 5,5′-Bis(mercaptomethyl)-2,2′-bipyridine 5,5′-Bis(mercaptomethyl)-2,2′-bipyridine 894105-98-7 Price
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