Uniform NaLuF4 nanoparticles with strong upconversion luminescence for background-free imaging of plant cells and ultralow power detecting of trace organic dyes

被引:25
作者
Hu, Shigang [1 ]
Wu, Xiaofeng [1 ]
Chen, Zenghui [2 ]
Hu, Pan [1 ]
Yan, Huanyuan [3 ]
Tang, Zhijun [1 ]
Xi, Zaifang [1 ]
Liu, Yunxin [2 ]
机构
[1] Hunan Univ Sci & Technol, Sch Informat & Elect Engn, Xiangtan 411201, Peoples R China
[2] Hunan Univ Sci & Technol, Dept Phys & Elect Sci, Xiangtan 411201, Peoples R China
[3] Hunan Univ Sci & Technol, Coll Mech & Elect Engn, Xiangtan 411201, Peoples R China
基金
中国国家自然科学基金;
关键词
Optical materials; Nanostructures; Fluorides; Luminescence; Optical properties; RESONANCE ENERGY-TRANSFER; IN-VIVO; GOLD NANOPARTICLES; LANTHANIDE; FLUORESCENCE; NANOPROBES; NANOPHOSPHORS; NANORODS; GLASSES;
D O I
10.1016/j.materresbull.2015.08.020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Yb3+ and Er3+/Tm3+ co-doped NaLuF4 upconversion nanoparticles (UCNPs) with strong visible luminescence under the excitation of infrared light are successfully synthesized. The synthesized NaLuF4 upconversion nanorystals have acidic ligand and can quickly capture the basic dyes to form UCNPs@dye nanosystem, in which the efficient luminescence resonance energy transfer (LRET) can be observed from UCNPs to dyes. We select NaLuF4:Yb3+/Er3+ UCNPs as a model to detect Rhodamine B (RB) in plant cells. NaLuF4:Yb3+/Er3+ UCNPs can emit green light at the wavelength of similar to 545 nm while RB can efficiently absorb the green light of similar to 545 nm to emit red light of 610 nm. As a result, the LRET process can occur in NaLuF4:Yb3+/Er3+@RB system. Based on the DIET process, an excitation power limit of 60 mu W can be achieved in detecting traces of RB in plant cells. This LRET process is also used for detecting sodium fluorescein with the excitation power limit of 65 mu W. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:6 / 13
页数:8
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