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Issue 30, 2016
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Understanding Au∼98Ag∼46(SR)60 nanoclusters through investigation of their electronic and local structure by X-ray absorption fine structure§

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Abstract

Here we report the electronic and local atomic structure of thiol-stabilized Au∼98Ag∼46(SR)60 nanoclusters investigated by synchrotron radiation-based X-ray absorption fine structure (XAFS). Au L3-edge X-ray absorption near edge fine structure (XANES) was used to examine the d band character of Au, which is highly related to the electronic, magnetic and catalytic activities of Au. It was observed that the d band hole population of Au in Au∼98Ag∼46(SR)60 was higher than that of bulk Au. The formation of the AuAg alloy was confirmed by extended X-ray absorption fine structure (EXAFS). The EXAFS results also suggested that Au atoms in Au∼98Ag∼46(SR)60 nanoclusters preferred to occupy the metal core sites, while the Ag atoms were mainly on the surface.

Graphical abstract: Understanding Au∼98Ag∼46(SR)60 nanoclusters through investigation of their electronic and local structure by X-ray absorption fine structure

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Article information


Submitted
21 Dec 2015
Accepted
29 Feb 2016
First published
02 Mar 2016

RSC Adv., 2016,6, 25368-25374
Article type
Communication

Understanding Au∼98Ag∼46(SR)60 nanoclusters through investigation of their electronic and local structure by X-ray absorption fine structure

J. Liu, K. S. Krishna, C. Kumara, S. Chattopadhyay, T. Shibata, A. Dass and C. S. S. R. Kumar, RSC Adv., 2016, 6, 25368
DOI: 10.1039/C5RA27396J

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