6533b7cffe1ef96bd12590f9

RESEARCH PRODUCT

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

Zhongyue LuanEero HulkkoEero HulkkoKarolina SokołowskaChristoph RameshanNoelia BarrabésV. A. ApkarianTanja Lahtinen

subject

Materials scienceScanning electron microscopeDisulfide bondDithiolElectronNanoclusterschemistry.chemical_compoundCrystallographyBipyridinechemistryScanning transmission electron microscopyGeneral Materials SciencePhysical and Theoretical ChemistrySpectroscopy

description

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.

yearjournalcountryeditionlanguage
2020-01-15The Journal of Physical Chemistry Letters
https://doi.org/10.1021/acs.jpclett.9b03496