Sub-10 nm lanthanide-doped SrFCl nanoprobes:Controlled synthesis,optical properties and bioimaging

作     者：Jiaojiao Wei Wei Lian Wei Zheng Xiaoying Shang Meiran Zhang Tao Dai Xueyuan Chen 

作者机构：College of ChemistryFuzhou UniversityFuzhou 350116China CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2019年第37卷第7期

页      面：691-698页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 070205[理学-凝聚态物理] 0708[理学-地球物理学] 070302[理学-分析化学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Project supported by the CAS/SAFEA International Partnership Program for Creative Research Teams the National Natural Science Foundation of China(21771185,11774345,21875250,21650110462) the CAS Youth Innovation Promotion Association(2016277) the Chunmiao Project of Haixi Institutes of the CAS(CMZX-2016-002) Natural Science Foundation of Fujian Province(201710018) 

主　　题：Lanthanide SrFCl nanocrystals Upconverting luminescence Thermal sensing Bioimaging Rare earths 

摘      要：Alkaline-earth dihalide nanocrystals(NCs) such as SrFCl, owing to their high chemical stability and low phonon energy, are excellent host materials for lanthanide(Ln3+) doping to achieve desirable optical properties for various bioapplications, Herein, we report a novel strategy for the synthesis of sub-10 nm Ln3+-doped SrFCl NCs with efficient upconverting and downshifting luminescence through a facile onestep hot-injection method. Utilizing the temperature-dependent upconverting luminescence(UCL) from the thermally coupled 2H11/2 and 4S3/2 levels of Er3+, we showed the potential of SrFCl:Yb,Er NCs as sensitive UCL nanoprobes for non-contact thermal sensing with a maximum detection sensitivity of 0.0066 K-1, which is among the highest values for thermal sensing based on Er3+-activated UCL nanoprobes. Furthermore, by employing the intense downshifting luminescence from Tb3+ and Eu3+, we demonstrated the successful use of biotinylated SrFCl:Ce,Tb and SrFCl:Eu3+ nanoprobes for biotin receptor-targeted cancer cell imaging, thus revealing the great promise of SrFCl:Ln3+ nanoprobes for versatile bioapplications.