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Nanoscale. 2011 Aug;3(8):3064-7. doi: 10.1039/c1nr10429b. Epub 2011 Jul 13.

(AuAg)144(SR)60 alloy nanomolecules.

Author information

1
Department of Chemistry and Biochemistry, University of Mississippi, 352 Coulter Hall, University, Mississippi 38677, USA.

Abstract

(Au-Ag)(144)(SR)(60) alloy nanomolecules were synthesized and characterized by ESI mass spectrometry to atomic precision. The number of Ag atoms can be varied by changing the incoming metal ratio and plateaus at ∼60. UV-vis data demonstrates that the electronic structure of the nanomolecules can be tuned by incorporation of silver atoms. Based on the proposed 3-shell structure of Au(144)(SR)(60), we hypothesize that the Ag atoms are selectively incorporated in to the symmetry equivalent 60-atom shell-having Au(12), Au(42), Ag(60) concentric shells with 30 -SR-Au-SR- protecting units.

PMID:
21750816
DOI:
10.1039/c1nr10429b

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