摘  要：納米材料的物理化學性能與其顆粒的形狀、尺寸有著密切的關系。ZnO納米材料由于寬的帶隙(3.37eV)，高的禁帶激發能(60mV)以及奇特的光電性能，使其在激光、催化、氣敏、壓電、傳感等方面得到了廣泛的應用。納米ZnO形貌豐富，如量子點、納米線、納米棒、納米管、納米環以及量子阱等，隨著結構的不同，納米ZnO表現出許多優異的光電性能，所以，ZnO納米結構的制備、控制與應用研究成為當前納米材料的研究熱點之一。

　　　本文首先對目前納米材料及納米ZnO的研究情況進行初步的介紹，隨后研究了采用類CVD法制備不同溫度下的ZnO納米棒。

　　　我們的研究主要圍繞ZnO納米棒的制備展開，在沒有使用催化劑的條件下，用類化學氣相沉積方法制備出氧化鋅納米棒，研究了生長溫度對形貌的影響。我們用X射線衍射譜、掃描電子顯微鏡等分析技術對所制備的氧化鋅納米棒結構材料進行了表征。

本實驗測試了不同溫度下所制備的ZnO納米棒光致發光性能，對測得的光致發光光譜及其發光機理進行了詳細的分析。實驗結果顯示所有樣品的PL譜都有三個峰，其中380nm左右的近帶邊發射是激子碰撞發光，在440nm左右藍光和510nm左右綠光的發射峰是由氧空位造成的發射峰。

關鍵詞：ZnO納米棒；類CVD；光學特性；光致發光

Abstract：For the physical and chemical properties of material closely related to the size and shape of their particles，the monodispersed nanomaterials have caused great attention in recent years. ZnO is recognized as one of the most important semiconductor materials due to its wide band gap(3.37eV)，large excitation binding energy(60meV)and extensive applications in optoelectronics，catalysis，sensors，piezoelectricity，etc．Therefore，extensive interests have been stimulated to prepare ZnO nanostructurematerials．

　　　In this paper， we gave a primary introduction about nanoparticles and situation of nano-structured ZnO at present ，which followed by demonstration of ZnO nanorods by similar chemical vapor deposition method at different temperature. We prepared ZnO nanowires(nanorods)without using catalysts by similar chemical vapor deposition method．The effects of growth temperaturon the morphology of ZnO nanomaterials was investigated in detail. The composition，morphology and microstructure of ZnO nanowires (nanorods) was characterized by means of X-Ray Diffraction，Scanning Electron Microscope．

　　　The photoluminescence(PL)spectra of ZnO samples were recorded by an Ultraviolet Fluorescence Spectrophotometer in 220nm excitation wavelength，and the PL spectra and corresponding emission mechanism were analyzed．The results show that there were mainly three peaks(390nm，440nm，500nm)for all samples．The emission peak at 380nm was induced by an exciton-exciton collision process，and the emission peak at about 440nm and 510nm were caused by oxygen vacancy．

Key word: ZnO nanorods; similar CVD; optics characteristic; Photoluminescencespread