Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 9, Pages 2854-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja909598g
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Funding
- EPSRC
- TSB
- Academy of Finland
- EPSRC [EP/D056241/1, EP/G070326/1, EP/E005918/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D056241/1, EP/E005918/1, EP/G070326/1] Funding Source: researchfish
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Mass spectrometry of supported, monolayer-protected, nominally Au-38 (MP-Au-38) clusters is performed via quantitative High Angle Annular Dark Field-Scanning Transmission Electron Microscopy (HAADF-STEM) using size-selected Au-N clusters (N = 25, 38, 55) as mass standards. With the intensity due to the (presumed) 24 hexanethiolate ligands taken into account, the clusters are found to contain 38 +/- 2 Au atoms. The method may also be used to determine the degree of aggregation of deposited nanoparticles.
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