title: Modulated exciton-plasmon interactions in Au-SiO2-CdTe composite nanoparticles.
abstract: 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.
authors.affiliation: Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Physics and Microelectronics Science, Hunan University, Changsha 410082, China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Tang
authors.forename: Jinyou
authors.initials: J
authors.lastname: Xu
authors.forename: Pengfei
authors.initials: P
authors.lastname: Guo
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Zhuang
authors.forename: Yong
authors.initials: Y
authors.lastname: Tian
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Wang
authors.forename: Huigao
authors.initials: H
authors.lastname: Duan
authors.forename: Anlian
authors.initials: A
authors.lastname: Pan
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis*; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D017785:Photons; D012822:Silicon Dioxide / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013691:Tellurium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D006046:Gold; D012822:Silicon Dioxide; D013691:Tellurium; C028337:cadmium telluride