微观结构对Eu:Ti纳米材料光学性能的影响  

Influence of Microstructure on the Optical Properpties of the Eu:Ti Nanomaterials

作　　者：曾庆光[1] 乐天[1,2] 蔡进军[1,2] 丁泽军[3] 刘剑[1] 盛业青[1] 王忆[1] 

机构地区：[1]五邑大学数学物理系,江门529020 [2]五邑大学化学与环境工程系,江门529020 [3]中国科学技术大学物理系合肥微尺度物质科学国家实验室,合肥230026

出　　处：《人工晶体学报》2009年第6期1429-1432,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.10874160);广东省科技计划项目(No.2009B030803015);2008年江门市科技计划项目;2008年五邑大学重点科研基金

摘　　要：以TiO2∶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Eu3＋的5D0→7F2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120μs。In this manuscript, Eu doped in TiO2 nanorods （Eu： Ti nanorods ） was prepared by hydrothermal and high temperatures annealing methods using TiO2： Eu nanoparticle（ molar ratio TiO2： 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 5D0→7F2 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.

关 键 词：纳米棒 荧光 寿命 

分 类 号：O64[理学—物理化学]