[Ag25(SR)18]¯: The ‘Golden’ Silver Nanoparticle

Chakra Prasad Joshi, Megalamane Siddaramappa Bootharaju, Mohammad Jaber Alhilaly, Osman Bakr

Research output: Contribution to journalArticlepeer-review

300 Scopus citations

Abstract

Silver nanoparticles with an atomically precise molecular formula [Ag25(SR)18]¯ (‒SR: thiolate) are synthesized and their single-crystal structure is determined. This synthesized nanocluster is the only silver nanoparticle that has a virtually identical analogue in gold, i.e., [Au25(SR)18]¯, in terms of number of metal atoms, ligand count, super-atom electronic configuration, and atomic arrangement. Furthermore, both [Ag25(SR)18]¯ and its gold analogue share a number of features in their optical absorption spectra. This unprecedented molecular synthesis in silver to mimic gold offers the first model nanoparticle platform to investigate the centuries-old problem of understanding the fundamental differences between silver and gold in terms of nobility, catalytic activity, and optical property.
Original languageEnglish (US)
Pages (from-to)11578-11581
Number of pages4
JournalJournal of the American Chemical Society
Volume137
Issue number36
DOIs
StatePublished - Sep 8 2015

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