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Chemically Selective Imaging of Individual Bonds through Scanning Electron Energy-Loss Spectroscopy: Disulfide Bridges Linking Gold Nanoclusters
journal contribution
posted on 2020-01-17, 14:09 authored by Karolina Sokołowska, Zhongyue Luan, Eero Hulkko, Christoph Rameshan, Noelia Barrabés, Vartkess A. Apkarian, Tanja LahtinenAs 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.
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electron energy-loss spectroscopyDisulfide BridgesIndividual BondsScanning Electron Energy-Loss SpectroscopyChemicallythiolate-coated gold nanoclustersliganddithiolatomicallyidentificationproof-of-principleimageImagingscanning transmission electron microscopy instrumentX-ray photoelectron spectra supportGold Nanoclustersbidisulfide bondsimaging
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