Interrelation of transport and optical properties in gold nanoclusters

Temperature dependence of the electrical conductivity and photoluminescence (PL) in Au nanoclusters (NCs) is investigated. The correlation of the conductivity and PL in Au NCs at different temperatures is evident: (i) for T < 50   K , both the conductivity and PL intensity decrease with temperatu...

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Bibliographic Details
Published in:Applied physics letters 2010-09, Vol.97 (12), p.123108-123108-3
Main Authors: Shu, G. W., Chen, T. Y., Shen, J. L., Lin, C. A. J., Chang, W. H., Chan, W. H., Wang, H. H., Yeh, H. I., Chou, W. C.
Format: Article
Language:English
Subjects:
CHARGE EXCHANGE
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EMISSION
FLUCTUATIONS
GOLD
LUMINESCENCE
MATERIALS SCIENCE
METALS
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
OPTICAL PROPERTIES
PARTICLES
PHOTOLUMINESCENCE
PHOTON EMISSION
PHYSICAL PROPERTIES
SOLID CLUSTERS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
VARIATIONS
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Summary:Temperature dependence of the electrical conductivity and photoluminescence (PL) in Au nanoclusters (NCs) is investigated. The correlation of the conductivity and PL in Au NCs at different temperatures is evident: (i) for T < 50   K , both the conductivity and PL intensity decrease with temperature, which suggests thermal structural fluctuations; (ii) for 50   K < T < 90   K , conductivity and PL are explained by variable range hopping; (iii) for 90   K < T < 170   K , simple thermal activated hopping dominates in conductivity, with a rate-equation model proposed to analyze the carrier transfer in PL.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3491288