氧化锌纳米棒的拉曼光谱研究  

Study on Raman Spectra of ZnO Nanorods

作　　者：孔晋芳[1] 

机构地区：[1]上海应用技术学院理学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2012年第4期329-331,335,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市优秀青年基金项目(405ZK10YQ02);上海应用技术学院人才引进项目(YJ2010-09)

摘　　要：用热蒸发法制备有铝模板存在Si衬底上的ZnO纳米棒,并对其变温拉曼(Raman)光谱进行研究。通过洛仑兹(Lorentz)模型拟合不同温度下的拉曼光谱,对样品的Raman峰进行了指认。运用一个详细的模型(考虑了晶格热膨胀和三声子、四声子衰变)描述拉曼光谱中的E2(high)模频率随温度的变化情况,拟合参数表明在E2(high)模频率随温度红移的过程中,四声子过程做了主要的贡献。Abstract：The Raman optical properties of ZnO nanorods grown on porous alumina membranes of Si substrates by thermal evaporation were studied. Through Lorentz mode fitting Raman spectra at differ- ent temperatures, Raman peaks of the samples were identified. F~ （high） modes in ZnO nanorods were well described by a mode taking into account the contributions of the lattice thermal expansion, and three-phonon and four-phonon decay. The results clearly showed that in the red shift process of E2 （high） modes with increasing temperatures in ZnO nanorods, four-phonon played a major contribution.

关 键 词：ZNO纳米棒 拉曼光谱 声子衰变 态密度 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O614.241[理学—无机化学]