CAJ | 학술논문

以TiO_2∶Eu纳米颗粒为原材料,采取水热和高温(700 ℃)退火的方法合成了铕掺杂钛纳米棒(简写成Eu∶Ti 纳米棒).其结构和光学性能用场发射扫描电镜,显微共聚焦激光拉曼光谱,稳态荧光以及寿命谱进行表征.场发射扫描电镜图片显示纳米棒的直径大约为30 nm,长度大约为300~600 nm.显微共聚焦激光拉曼光谱测试结果表明纳米棒中含有部分锐钛矿结构.稳态荧光光谱显示纳米棒的发光强度明显比纳米颗粒的强度强,而且发光谱线也不同.检测Eu~(3+)的~5D_0→~7F_2跃迁(发光峰位在612 nm)的发光强度,采用394 nm激发,发现纳米棒的寿命比纳米颗粒的长120 μs.
이TiO_2∶Eu납미과립위원재료,채취수열화고온(700 ℃)퇴화적방법합성료유참잡태납미봉(간사성Eu∶Ti 납미봉).기결구화광학성능용장발사소묘전경,현미공취초격광랍만광보,은태형광이급수명보진행표정.장발사소묘전경도편현시납미봉적직경대약위30 nm,장도대약위300~600 nm.현미공취초격광랍만광보측시결과표명납미봉중함유부분예태광결구.은태형광광보현시납미봉적발광강도명현비납미과립적강도강,이차발광보선야불동.검측Eu~(3+)적~5D_0→~7F_2약천(발광봉위재612 nm)적발광강도,채용394 nm격발,발현납미봉적수명비납미과립적장120 μs.
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.