关键词: 纳米棒;荧光;寿命

Abstract: In this manuscript, Eu doped in TiO_2 nanorods (Eu∶Ti nanorods) was prepared by hydrothermal and high temperatures annealing methods using TiO_2∶Eu nanoparticle(molar ratio TiO_2∶Eu =100∶1,the particle size was about 10-30 nm,anatase)as raw materials. The structure and optical properties of the Eu∶Ti nanorods were characterized by field emission scanning electronic microscopy (FE-SEM) and confocal microscope Raman spectrometer. The FE-SEM image shows the nanorods diameter is 30 nm and length is 300-600 nm. A part of anatase phase was also observed in nanorods by Raman spectra. The steady-state/lifetime spectrofluorometer was used to record the emission spectra and the lifetime curves of the samples. It is obviously that the fluorescence spectra of the Eu∶Ti nanorods is different from the nanoparticle, and the emission intensity of the former is stronger than later. By monitoring the ~5D_0→~7F_2 transition intensity of the Eu~(3+) excited by the 394 nm line, it is found that the lifetime of nanorods is longer 120 μs than the nanoparticle.