標題: Single fluorescent gold nanoclusters
作者: Yuan, C. T.
Chou, W. C.
Tang, J.
Lin, C. A.
Chang, W. H.
Shen, J. L.
Chuu, D. S.
電子物理學系
Department of Electrophysics
公開日期: 31-Aug-2009
摘要: Both ensemble and single-molecule measurements were performed to explore the fluorescence properties of Au nanoclusters (NCs). Photoinduced fluorescence enhancement was observed for ensemble NCs in solution, but photobleaching was found at ambient environments. At the single-molecule level, fluorescence blinking and single-step photobleaching were observed. Furthermore, their time-resolved fluorescence shows a single exponential decay with a lifetime of similar to 7 ns and is insensitive to changes in fluorescence intensity. The lifetime distribution is more homogeneous within ensemble Au NCs as compared to CdSe QDs. Therefore, Au NCs have potential applications as nontoxic fluorescent labels for lifetime-based imaging microscopy. However, their low quantum yields and poor photostability are disadvantageous factors, which require further improvement. (C) 2009 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.17.016111
http://hdl.handle.net/11536/6782
ISSN: 1094-4087
DOI: 10.1364/OE.17.016111
期刊: OPTICS EXPRESS
Volume: 17
Issue: 18
起始頁: 16111
結束頁: 16118
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