Modulated exciton-plasmon interactions in Au-SiO2-CdTe composite nanoparticles.
Modulated exciton-plasmon interactions in Au-SiO2-CdTe composite nanoparticles.
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DOI：
10.1364/oe.21.011095
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发表时间：
2013-05
期刊：
影响因子：
3.8
通讯作者：
Lijuan Tang;Jinyou Xu;Pengfei Guo;Xiujuan Zhuang;Yong Tian;Yicheng Wang;H. Duan;A. Pan
中科院分区：
文献类型：
--
作者：
Lijuan Tang;Jinyou Xu;Pengfei Guo;Xiujuan Zhuang;Yong Tian;Yicheng Wang;H. Duan;A. Pan
为了研究金属与半导体纳米结构之间的相互作用，在水溶液中通过多步化学反应合成了结构清晰的Au-SiO（2）-CdTe复合纳米粒子。光致发光测试表明，在优化的SiO2厚度（4 nm）下，复合材料中CdTe量子点的荧光强度比未掺杂的CdTe量子点增强了10倍以上。CdTe量子点的荧光显著增强归因于表面等离子体共振，寿命测量进一步证实了这一点。增强的荧光可用于提高CdTe量子点作为荧光探针的性能，并可能在生物标记中找到潜在的应用。
Well-defined Au-SiO(2)-CdTe composite nanoparticles were synthesized via a multistep chemical approach in water solution to gain insight into the interaction between metal and semiconductor nanostructures. Photoluminescence measurement reveals that the fluorescence of CdTe quantum dots (QDs) in this composite with optimized SiO(2) thickness (4 nm) has over ten times enhancement compared with that of bare CdTe QDs. The considerable fluorescence enhancement of CdTe QDs is attributed to the surface plasmon resonance, which is further confirmed by the lifetime measurement. The enhanced fluorescence can be used to improve the performance of CdTe QDs as fluorescence probe and may find potential applications in biolabeling.