Chemically Selective Imaging of Individual Bonds through Scanning Electron Energy-Loss Spectroscopy : Disulfide Bridges Linking Gold Nanoclusters
Sokołowska, K., Luan, Z., Hulkko, E., Rameshan, C., Barrabés, N., Apkarian, V. A., & Lahtinen, T. (2020). Chemically Selective Imaging of Individual Bonds through Scanning Electron Energy-Loss Spectroscopy : Disulfide Bridges Linking Gold Nanoclusters. Journal of Physical Chemistry Letters, 11(3), 796-799. https://doi.org/10.1021/acs.jpclett.9b03496
Published inJournal of Physical Chemistry Letters
DisciplineFysikaalinen kemiaOrgaaninen kemiaNanoscience CenterPhysical ChemistryOrganic ChemistryNanoscience Center
© 2020 American Chemical Society
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.
PublisherAmerican Chemical Society
Publication in research information system
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Additional information about fundingThis work was supported by the National Science Foundation Center for Chemical Innovation on Chemistry at the Space-Time Limit (CaSTL), Grant Number CHE-1414466. STEM-EELS characterization was performed at the user facilities of the UC Irvine Materials Research Institute (IMRI), including instrumentation funded in part by the National Science Foundation Major Research Instrumentation Program under Grant No. CHE-1338173. We thank Dr. Toshiro Aoki for support measuring STEM-EELS at IMRI and C.R. for providing XPS spectra. We acknowledge Zhipei Sun and Mika Pettersson for fruitful discussions and financial support. ...
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