title: Spectroscopic study of Eu3+ doped LaF, nanoparticles prepared with different PH values.
abstract: Europium doped lanthanide fluoride (LaF3) nanoparticles were prepared through a hydrothermal method with different PH values of precursor complex solution. The influence of PH value on the luminescence properties is investigated. It was found that the local symmetry of doped ions reduced with the increase of PH value, leading to the increase of the inversion symmetry ratio. The fluorescence quenching was observed for small nanoparticles, which was attributed to the large amount of OH groups absorbed to the surface of the nanoparticles.
authors.affiliation: College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Tian
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng
authors.forename: Min
authors.initials: M
authors.lastname: Cui
authors.forename: Zhengxing
authors.initials: Z
authors.lastname: Fu
authors.forename: Dangli
authors.initials: D
authors.lastname: Gao
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
mesh_terms: D005063:Europium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007811:Lanthanum / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D013050:Spectrometry, Fluorescence; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: C083668:lanthanum trifluoride; D005063:Europium; D007811:Lanthanum; D005459:Fluorides