Site-selective photoluminescence in thiol-capped gold nanoclusters

Photoluminescence (PL) from the thiol-capped Au nonoclusters (NCs) has been investigated under site-selective excitation. Upon scanning the excitation light with energy below 2.1eV down to 1.6eV, the PL narrows and begins shifting linearly with excitation energy. The time-resolved PL was studied and...

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Bibliographic Details
Published in:Applied physics letters 2012-03, Vol.100 (10), p.103102-103102-4
Main Authors: Lin, T. N., Liu, C. H., Shu, G. W., Shen, J. L., Lin, C. A. J., Chang, W. H., Wang, H. H., Yeh, H. I., Chan, W. H.
Format: Article
Language:English
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Summary:Photoluminescence (PL) from the thiol-capped Au nonoclusters (NCs) has been investigated under site-selective excitation. Upon scanning the excitation light with energy below 2.1eV down to 1.6eV, the PL narrows and begins shifting linearly with excitation energy. The time-resolved PL was studied and the PL decay traces of Au NCs were found to depend on the excitation and emission energies. The slow carrier relaxation in the localized states is suggested to be responsible for the line narrowing and peak-shift in the site-selective PL.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3692575