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  • Title: One-dimensional Ce3+- and/or Tb3+-doped X1-Y2SiO5 nanofibers and microbelts: electrospinning preparation and luminescent properties.
    Author: Wang L, Hou Z, Quan Z, Li C, Yang J, Lian H, Yang P, Lin J.
    Journal: Inorg Chem; 2009 Jul 20; 48(14):6731-9. PubMed ID: 19522469.
    Abstract:
    One-dimensional X(1)-Y(2)SiO(5):Ce(3+) and -Tb(3+) nanofibers and quasi-one-dimensional X(1)-Y(2)SiO(5):Ce(3+) and -Tb(3+) microbelts have been prepared by a simple and cost-effective electrospinning process. X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry, transmission electron microscopy, high-resolution transmission electron microscopy, photoluminescence (PL), and cathodoluminescence spectra were used to characterize the samples. SEM results indicate that the as-prepared fibers and belts are smooth and uniform with a length of several tens to hundreds of micrometers, whose diameters decrease after being annealed at 1000 degrees C for 3 h. Under ultraviolet excitation and low-voltage electron beam excitation, the doped rare earth ions show their characteristic emission, that is, Ce(3+) 5d-4f and Tb(3+ 5)D(4)-(7)F(J) (J = 6, 5, 4, 3) transitions, respectively. PL excitation and emission spectra demonstrated that there is an energy transfer from Ce(3+) to Tb(3+) in the X(1)-Y(2)SiO(5):Ce(3+),Tb(3+) samples. Additionally, the X(1)-Y(2)SiO(5):Ce(3+) and -Tb(3+) microbelt phosphors show a higher emission intensity than that of nanofiber phosphors under UV and low-voltage electron beam excitation.
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