钛酸铅纳米线的XPS和Raman特性研究  

XPS and Raman studies of single-crystalline PbTiO_3 nanowires

作　　者：蔡亚璇[1] 胡永明[1] 尤晶[1] 袁颖[1] 胡正龙[1] 王钊[1] 

机构地区：[1]湖北大学铁电压电材料和器件省重点实验室,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2007年第3期258-260,共3页Journal of Hubei University：Natural Science

基　　金：湖北省自然科学基金创新群体项目(2005ABC008)

摘　　要：采用水热法在200℃合成直径约为12 mm、长度达5μm、具有四方相钙钛矿结构的钛酸铅（PbTiO3）纳米线.X射线光子能谱（XPS）结果表明,PbTiO3纳米线的Ti 2p（3/2）结合能中心峰值大于PbTiO3陶瓷,导致Ti 2p自旋轨道分裂（Δ（2p（3/2）-2p（1/2）））增大.室温激光Raman光谱研究显示,PbTiO3纳米线的振动模具有红移和拉曼峰展宽现象,表明纳米线的声子寿命相对于块体材料有所减小.Lead titanate nanowires are synthesized by hydrothermal method at 200℃. The products have a tetragonal perovskite structure without any other impurity phase, which are made up of a large quantity nanowires with uniform diameters of about 12 nm and lengths reaching up to 5 ~m. XPS result shows that the binding energy of Ti 2p（3/2） core level peak for PbTiO3 nanowires is larger than the corresponding ceramics, and lead to the larger spin-orbit splitting （Δ（2p（3/2）-2p（1/2））） for Ti 2p. Raman studies at room temperature show that the vibration modes of nanowires were redshifting and broadening, which have shorter phonon lifetime compared with that of bulk materials.

关 键 词：钛酸铅纳米线 水热法 XPS 拉曼光谱 

分 类 号：TB303[一般工业技术—材料科学与工程]