中文摘要：

以ZnS和金属Zn粉末混合物为蒸发源以及金属Zn片为衬底，利用热蒸发气相沉积方法，在弯曲的金属Zn微球表面上，成功地获得了ZnO亚微米棒阵列结构。场发射扫描电镜研究表明：在弯曲的Zn微球表面，能自组织地生长出大量的截面为六边形的ZnO亚微米棒，这些亚微米棒的平均直径为500nm，长约1μm。棒的顶部是平滑的。能量散射x射线谱结果表明：合成的产品只存在Zn和O两种元素，其成分比例接近1：1。没有观察到S元素。光致发射（PL）光谱显示：在387nm紫外波长处，出现一个强的半峰全宽为16nm的窄发光峰，可归属于ZnO的近带边发光，而509nm左右较弱的宽峰则源于界面缺陷态发光。这些研究结果说明我们所合成的这种ZnO亚微米棒阵列材料在紫外受激发射器件方面有着潜在的应用价值。

英文摘要：

ZnO sub-micrometer rod arrays have been prepared on bent surface of Zn microspheres by thermal evaporating the mixture of ZnS and Zn powder to metal Zn slice. In a typical preparation process, 0.01 mol ZnS and 0.01 mol Zn powder were mixed in an aluminum boat and positioned at the center of a horizontal quarts tube furnace. A slice of metal Zn substrate in a small quartz boat was located in downstream region of the tube. The whole system was sealed and pumped to a pressure of 100 Pa. High-purity Ar was aerated into the tube at a flow rate of 100 standard cubic centimeters per minute. The pressure in the tube was kept at 0.04 MPa. The furnace temperature was heated up to 900 ℃ at a 20 ℃/min rate. The system was kept at 900℃ for 2 h. After the furnace was cooled to room temperature naturally, white wool-like matter was found to deposit on the Zn substrate. Finally, the product was collected for further characterizations by field-emission scanning electron microscope （FE-SEM, Hitachi S-4800） and LEO 1550 SEM attached with an Oxford Inca Drycool EDS detector. The results show ZnO sub-micrometer rod arrays can self-organized grow on surfaces of formed Zn microspheres. These ZnO rods with hexagonal cross-section have an average diameter of 500 nm and length of 1 μm. Top of the ZnO rod is very fiat. Energy dispersive X-ray spectrum of the ZnO rod array demonstrates that only Zn and O elements exist with a ratio of about 1： 1. No S element has been found. ZnO crystal exhibits hexagonal wurtzite structure, which belongs to the space group C4v^6. According to selection rule of phonon mode, Raman active modes for the wurtzite ZnO are： 1A1 ＋2B2 ＋ 1El ＋2E2. A1 and E1 modes are polar and can split into the transverse optical （TO） and longitudinal optical （LO） phonon modes. E2 mode is non-polar optical phonon mode, which is composed of two modes with low and high frequency. The vibration peaks at 331,381,430 and 580 cm^-1 can be clearly observed in Raman spectrum of the ZnO sub-micrometer rod array.