Au144−xCux(SC6H13)60 nanomolecules: effect of Cu incorporation on composition and plasmon-like peak emergence in optical spectra

Asantha C. Dharmaratne; Amala Dass

doi:10.1039/C3CC47060A

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Au_144−xCu_x(SC₆H₁₃)₆₀ nanomolecules: effect of Cu incorporation on composition and plasmon-like peak emergence in optical spectra†

Asantha C. Dharmaratne^a and Amala Dass*^a

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* Corresponding authors

^a Department of Chemistry and Biochemistry, University of Mississippi, 352 Coulter Hall, University, 38677 Mississippi, USA
E-mail: amal@olemiss.edu
Fax: +1 662 915 7300
Tel: +1 662 915 1826

Abstract

Au_144−xCu_x(SR)₆₀ alloy nanomolecules were synthesized and characterized by using ESI-MS to atomic precision. A maximum of 23 copper atoms replace the gold atoms. When the number of copper atoms is higher than eight, a surface plasmon-like peak appears at ∼520 nm. Based on the fundamental elemental properties of Au and Cu, we predict a mixed atomic ordering and incorporation of Cu atoms into the Au₁₂ and Au₄₂ shells of the proposed icosahedral structure model of the 144-atom nanomolecule.

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Article information

DOI: https://doi.org/10.1039/C3CC47060A
Article type: Communication
Submitted: 15 Sep 2013
Accepted: 25 Nov 2013
First published: 07 Jan 2014

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Chem. Commun., 2014,50, 1722-1724

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Au_144−xCu_x(SC₆H₁₃)₆₀ nanomolecules: effect of Cu incorporation on composition and plasmon-like peak emergence in optical spectra

A. C. Dharmaratne and A. Dass, Chem. Commun., 2014, 50, 1722 DOI: 10.1039/C3CC47060A

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