Upconversion luminescent property and EPR study of NaGdF4：yb3＋/Tm3＋ synthesized by the hydrothermal method

作     者：Jing LIU Jing-Ying ZHANG Kai LIU Hong-Jian GAO Xiao-Long YU Yang CAO Zhong-Xin LIU 

作者机构：Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan University Haikou 570228 China 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2015年第9卷第3期

页      面：241-246页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No. 51361009)  Key Program for International S&T Cooperation Projects of Hainan Province  China (GJXM201103)  Science and Technology Department of Hainan Province  China (Grant No. 090401)  and the Natural Science Foundation of Hainan Province  China (Grant No. 513136) 

主　　题：hydrothermal method sodium source fluorine source electron paramagnetic resonance (EPR) magnetic resonance imaging (MRI) 

摘      要：Water soluble upconversion （UC） luminescence hexagonal-phase NaGdF4： yb3＋/Tm3＋ nanoparticles have been successfully synthesized by the hydrothermal method. XRD, SEM, UC photoluminescence spectra and electron paramagnetic resonance （EPR） spectrum were used to characterize the nanoparticles. The intensity of UC emission region could be controlled through different sodium source and the fluorine source, 6PJ→8S7/2 emission of Gd3＋ is also observed at 310 nm. A broad spectrum with a dominant resonance at g of about 2 was observed by the EPR spectrum of the NaGdF4：Yb3＋/Tm3＋ nanoparticles. The transparent NaGdF4：yb3＋/Tm3＋ solution presented naked eye-visible violet-blue light under the 980 nm LD excitation. The current work paves the way for their potential application in infrared tomography and magnetic resonance imaging （MRI）.