Luminescence Resonance Energy Transfer in Au@SiO2/LaF3∶Ce, Tb Nanostructures

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (3): 635.

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Luminescence Resonance Energy Transfer in Au@SiO2/LaF3∶Ce, Tb Nanostructures

FENG Wei, ZHAO Guang-Yao, SUN Ling-Dong, YAN Chun-Hua*

College of Chemistry and Molecular Engineering, Beijng National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China

Received:2010-10-15 Revised:2010-11-11 Online:2011-03-10 Published:2011-02-23
Contact: YAN Chun-Hua E-mail:yan@pku.edu.cn
Supported by:
国家自然科学基金(批准号: 20821091, 20971005, 20828001)资助.

Abstract

Abstract: Au@SiO2/LaF3:Ce,Tb nanostructures were synthesized simply by the coprecipitation of LaF3:Ce,Tb in the presence of Au@SiO2 nanoparticles. The as-obtained nanostructures were used as a model system to investigate the luminescence resonance energy transfer (LRET) process, where LaF3:Ce,Tb, Au, and SiO2 served as long-lifetime donor, quenching acceptor, and distance spacer, respectively. The LRET efficiency decreased with the increase of thickness of silica shell. The LRET process could still be observed even when the thickness of silica shell increased up to 42 nm. This long-distance LRET phenomenon can be attributed to the long lifetime of Tb3+ and the “point-to-surface” transfer model modified for Au nanoparticle acceptor. This result indicates that the analogous systems could be employed to study the LRET processes that take place over larger distances (> 10 nm).

Key words: luminescence resonance energy transfer, rare earth nanoparticles, gold nanoparticle, core-shell structure

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FENG Wei, ZHAO Guang-Yao, SUN Ling-Dong, YAN Chun-Hua*. Luminescence Resonance Energy Transfer in Au@SiO2/LaF3∶Ce, Tb Nanostructures[J]. Chem. J. Chinese Universities, 2011, 32(3): 635.

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Luminescence Resonance Energy Transfer in Au@SiO2/LaF3∶Ce, Tb Nanostructures

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