Author(s): Zhao Fengying, Xie Yunzhi, Li Yibao, Lian Ping, Luo Guotian, College of Chemistry and Chemical Engineering, Gannan Normal University, Department of Applied Chemistry, Jiangxi College of Applied Technology
Pages: 541-547
Year: 2014 Issue:  5
Journal: Journal of the Chinese Rare Earth Society
Keyword:  up-conversion; rare earth nanoparticles; water-solubility; synthesis; characterization;
Abstract: The water soluble NaLaF4:12%Yb3 +,3%Er3 +(mole fraction) up-conversion nanoparticles(UCNPs)were synthesized by rare earth ions,oleic acid,m-chloroperoxybenzoic acid and mPEG as raw materials.This product was characterized by NMR,infrared spectrum,atomic force microscope(AFM) and transmission electron microscope(TEM).The results showed that mPEG-UCNPs with uniform size are prepared successfully.Particle size is 15 ~ 25 nm.The properties of fluorescence were characterized by molecular fluorescence spectra(MFS),which indicated that the mPEG-UCNPs have good up-conversion fluorescence properties at 510 ~ 580 nm and 635 ~700 nm.