固相反应法制备ZnO纳米晶的变温拉曼光谱  

Temperature-dependent Raman spectrum of ZnO nanocrystals synthesized by technique of solid-phase reaction

作　　者：吴尝[1] 朱克荣[2,3] 马永青[2] 

机构地区：[1]阜阳师范学院信息工程学院,安徽阜阳236041 [2]安徽大学物理与材料科学学院,安徽合肥230039 [3]安徽大学现代实验技术中心,安徽合肥230039

出　　处：《合肥工业大学学报（自然科学版）》2011年第7期997-1000,共4页Journal of Hefei University of Technology：Natural Science

基　　金：安徽高校省级自然科学研究重点资助项目(KJ2010A012);安徽大学人才队伍建设基金资助项目(02203105/05)

摘　　要：文章利用固相反应法,制备了不同粒径的ZnO纳米晶;采用透射电镜(TEM)、选区衍射(SAED)、X射线衍射(XRD)对制备的ZnO纳米晶性质进行研究,观察室温和变温拉曼光谱,发现二级散射2TO模(983 cm-1)的相对强度随颗粒的减小而增大,这是由于小颗粒晶体的晶格平移对称性受到一定的破坏;随着温度的降低,ZnO的E2模的频率蓝移,线宽变窄,是因为三声子的相互作用。ZnO nanocrystals with different diameters were synthesized by the technique of solid-phase reaction and characterized by XRD,TEM and SAED.Room temperature and temperature-dependent Raman spectrum were investigated.The reason why the relative strength of the second order scattering 2TO mode（983 cm-1） increases with the decrease of the diameter of the crystal is that the crystal lattice symmetry of the small crystal is damaged to a certain extent.As the temperature decreases,the frequency of E2 mode turns to blue-shift and the band width narrows,which is attributed to the reaction of three phonons.

关 键 词：ZNO 纳米晶 拉曼光谱 

分 类 号：O437.3[机械工程—光学工程]