Site Selective Spectroscopy of Surfactant-Assembled Y2O3∶Eu Nanotubes
来源期刊：JOURNAL OF RARE EARTHS2003年第6期
论文作者：吴长锋 张继森 赵丹 秦冠仕 秦伟平
Key words：optics; luminescence; Y2O3∶Eu; nanotube; rare earths;
Abstract: Y2O3:Eu nanotubes were synthesized by a surfactant assembly mechanism. Under ultraviolet-light excitation, the nanotubes present luminescence properties different from that of Y2O3∶Eu nanoparticles. The peak position of the charge transfer band in excitation spectra varies with the monitoring emission peaks, while the emission spectra are dependent on the excitation wavelength. Laser selective spectroscopy was performed to distinguish the local symmetries of the Eu3+ ions in the nanotubes. The results of laser-selective excitation in dicate that the emission centers near the surface of nanotube walls exhibit inhomogeneously broadened spectra without spectral structures while the two sites (site B and site C) inside the nanotube walls present resolved spectral structures . It is concluded by the number and peak positions of the spectral lines that the sites Band Cpossess different site symmetries.
吴长锋1，张继森1，赵丹1，秦冠仕1，秦伟平1
(1.Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun,130022, China)
Abstract:Y2O3:Eu nanotubes were synthesized by a surfactant assembly mechanism. Under ultraviolet-light excitation, the nanotubes present luminescence properties different from that of Y2O3∶Eu nanoparticles. The peak position of the charge transfer band in excitation spectra varies with the monitoring emission peaks, while the emission spectra are dependent on the excitation wavelength. Laser selective spectroscopy was performed to distinguish the local symmetries of the Eu3+ ions in the nanotubes. The results of laser-selective excitation in dicate that the emission centers near the surface of nanotube walls exhibit inhomogeneously broadened spectra without spectral structures while the two sites (site B and site C) inside the nanotube walls present resolved spectral structures . It is concluded by the number and peak positions of the spectral lines that the sites Band Cpossess different site symmetries.
Key words:optics; luminescence; Y2O3∶Eu; nanotube; rare earths;
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