采用热蒸发法以锌粉和二水醋酸锌作为源材料在Si(111)衬底上制备了高密度的ZnO微纳米棒, 制得的每根ZnO棒明显分为直径不同的四段. 利用X射线衍射、扫描电镜、透射电镜、拉曼光谱和光致发光谱等测试手段对制备的样品进行了形貌、结构和光学性能的分析, 结果表明制备的ZnO棒晶体质量良好, 仅存在很少量的缺陷. 通过讨论该结构的生长机理, 发现O2分压对制备的ZnO微纳米棒的形貌有显著的影响, 调节O2流量可控制ZnO纳米结构的形貌.
High-density bat-like ZnO micro- and nanorods were prepared on Si(111) substrates by a thermal evaporation method using Zn powders and zinc acetate dihydrate (ZA) as the source materials. X-ray diffraction, field emission scanning electron microscope, transmission electron microscope, Raman scattering and photoluminescence were used to characterize the structural and optical properties of the obtained samples. The results indicate that the individual rod has four knots with different diameters, the rods are a high-quality single crystal with a few defects. The growth mechanism of the structures proposed reveals that oxygen partial pressures play an important role in the growth process. The shape of ZnO nanostructures can be controlled by adjusting oxygen flux.
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