Counting the Atoms in Supported, Monolayer-Protected Gold Clusters

Zhiwei Wang, O Toikkanen, Feng Yin, Zi Li, BM Quinn, Richard Palmer

Research output: Contribution to journalArticle

48 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)2854-+
JournalJournal of the American Chemical Society
Issue number9
Publication statusPublished - 1 Mar 2010


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