title: Hydrothermal preparation and luminescence of LaF3:Eu3+ nanoparticles.
abstract: LaF3:Eu3+ nanoparticles were prepared by a simple hydrothermal process at low temperature and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectrum. Well-dispersed nanoparticles with an average size of 30 nm and a hexagonal shape were obtained. The influences of reaction temperature and time on the preparation and luminescence of LaF3:Eu3+ nanoparticles were investigated. Luminescent quenching occurred at a much higher concentration ( approximately 25mol%) and stronger luminescent intensity than in bulk LaF3:Eu3+. Fluorescence intensity of the LaF3:Eu3+ nanoparticles varied remarkably with calcination temperatures. It was found that samples without any further calcinations can emit quite strong fluorescence.
authors.affiliation: Department of Chemistry, Institute of Nano-chemistry, Jinan University, Guangzhou 510632, China. tmjx@jnu.edu.cn
authors.forename: Jian-Xin
authors.initials: JX
authors.lastname: Meng
authors.forename: Mao-Feng
authors.initials: MF
authors.lastname: Zhang
authors.forename: Ying-Liang
authors.initials: YL
authors.lastname: Liu
authors.forename: Shi-Qing
authors.initials: SQ
authors.lastname: Man
mesh_terms: D005063:Europium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D006358:Hot Temperature; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D014961:X-Ray Diffraction
chemical_list: C083668:lanthanum trifluoride; D005063:Europium; D007811:Lanthanum; D005459:Fluorides