Construction of self-sensitized LiErF4:0.5%Tm^3+@LiYF4 upconversion nanoprobe for trace water sensing  

作　　者：Ling Zhang Xiaodan Li Wang Wang Xu Zhao Xu Yan Chenguang Wang Haoqiang Bao Yang Lu Xianggui Kong Fengmin Liu Xiaomin Liu Geyu Lu 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics,hilin Key Laboratory of Advanced Gas Sensors,College of Electronic Science and Engineering,Jjilin University,Changchun 130012,China [2]Department of Respiratory Medicine,The First Hospital,jilin University,Changchun 130021,China [3]State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Plhysics,Chinese Academy of Science,Changchun 130033,China

出　　处：《Nano Research》2020年第10期2803-2811,共9页纳米研究（英文版）

基　　金：the Science and Technology Development Program of Jilin Province(No.20170520162]H);the National Key Research and Development Program of China(No.016YFC0207300);the National Natural Science Foundation of China(Nos.61875191,11874354,61722305,and 61833006);the Program for Jilin University Science and Technology Innovative Research Team(No.JLUSTIRT 2017TD-07);Jilin Development and Reform Commission(No.2018C052-10);the Open Project of State Key Laboratory of Supramolecular Structure and Materials(No.sklssm202023).

摘　　要：LiErF4 was commonly used as a dipolar-coupled antiferromagnet,and was rarely considered as a luminescent material.Herein,we achieved the strong red upconversion emission of LiErF4 simply by an inert shell coating,i.e.,[e-mail] to the unique and intrinsic ladder-like energy levels of Er3+ions,this LiErF4 core–shell nanostructures present red emission(~650 nm)under multi-band excitation in the near-infrared(NIR)region(~808,~980,and^1,530 nm).A brighter and monochromic red emission can be further obtained via doping 0.5%Tm3+into the LiErF4 core,i.e.,LiErF4:[e-mail] enriched Er3+ions and strong monochromic red emission natures make LiErF4:0.5%Tm3+@LiYF4 nanocrystals very sensitive for trace water probing in organic solvents with detection limit of 30 ppm in acetonitrile,50 ppm in dimethyl sulfoxide(DMSO),and 58 ppm in N,N-dimethylformamide(DMF)under excitation of 808 nm.Due to their superior chemical and physical stability,these nanoprobes exhibit excellent antijamming ability and recyclability,offering them suitable for real-time and long-term water monitoring.

关 键 词：LiErF4 water detection upconversion emission SENSOR self-sensitized 

分 类 号：O62[理学—有机化学]