Abstract
Eu 3+ doped NaGdF 4 (NaGdF 4:Eu 3+) nanocrystals in hexagonal crystal phase were prepared by a polyol method, and the size and morphology controllable NaGdF 4:Eu 3+/PVP nano-composite fibers were obtained through the electrospinning technique, and then the NaGdF 4:Eu 3+ nanowires were obtained by followed annealing. By changing the ratio of PVP to NaGdF 4 as well as the calcination temperature, the optimal conditions for synthesizing the NaGdF 4 nanowires were obtained, and the structural properties of the synthesized sample were characterized by powder X-ray diffraction (XRD) patterns and field emission scanning electron micrographs (SEM) images. The luminescent properties of the NaGdF 4:Eu 3+ nanocrystals and nanowires were also studied in this paper. We observed that the luminescent intensity of NaGdF 4:Eu 3+ nanowires was greatly increased compared to the annealed NaGdF 4:Eu 3+ nanocrystals at the same temperature.
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