Magnetic tuning of upconversion luminescence in Au/NaGdF4: Yb3+/Er3+ nanocomposite

被引：17

作者：

Dai, Gangtao ^{[1
]}

Zhong, Zhiqiang ^{[2
]}

Wu, Xiaofeng ^{[3
]}

Zhan, Shiping ^{[1
]}

Hu, Shigang ^{[3
]}

Hu, Pan ^{[3
]}

Hu, Junshan ^{[1
]}

Wu, Shaobing ^{[1
]}

Han, Junbo ^{[2
]}

Liu, Yunxin ^{[1
]}

机构：

[1] Hunan Univ Sci & Technol, Dept Phys & Elect Sci, Xiangtan 411201, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Hubei, Peoples R China

[3] Hunan Univ Sci & Technol, Dept Informat Sci, Xiangtan 411201, Peoples R China

来源：

NANOTECHNOLOGY | 2017年 / 28卷 / 15期

基金：

中国国家自然科学基金;

关键词：

optical-magnetic bifunctional; upconversion luminescence; paramagnetic; magnetic field; NANOPARTICLES; NANOCRYSTALS; RESONANCE; FLUORESCENCE; SPECTROSCOPY; TM3+; YB3+;

D O I：

10.1088/1361-6528/aa61f8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Lanthanide-doped upconversion nanoparticles (UCNPs) NaGdF4: Yb3+/Er3+ have received increasing attention due to their unique optical-magnetic bifunctional properties. Here, we show that the luminescent intensity from NaGdF4: Yb3+/Er3+ nanoparticles decreases monotonously with increasing the applied magnetic field from 0 to 37.1 T, while plasmon-enhanced upconversion luminescence in Au/NaGdF4: Yb3+/Er3+ nanocomposite is independent of a magnetic field lower than 6 T. The surface plasmon resonances could compensate for the energetic mismatching between the excitation light and the energy-level gaps induced by magnetic field and enhance the radiative efficiency, which is the main factor for achieving this stable upconversion emission in this nanocomposite under a magnetic field not higher than 6 T. These findings provide a novel route for exploring the magnetic control of upconversion luminescence in lanthanide-doped bifunctional nanoparticles.

引用

页数：7

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