Ma Teng, Guo Min, Zhang Mei, Zhang Yanjun, Wang Xidong
Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
Nanotechnology. 2007 Jan 24;18(3):035605. doi: 10.1088/0957-4484/18/3/035605. Epub 2007 Jan 3.
Density-controlled ZnO nanorod arrays (ZNAs) were prepared on pre-treatment substrates by a hydrothermal approach under different conditions. The effect of substrate pre-treatment conditions on controlling the density of ZNAs was systematically studied by scanning electron microscopy and x-ray diffraction. It is demonstrated that the substrate pre-treatment conditions such as the concentration of the ZnO colloid, spin coating times, and substrate annealing treatment have their respective influence on controlling the density of the ZNAs. The introduction of a ZnO nanoparticle layer on the substrate not only helps to control the nanorod density but also has a strong impact on the orientation of the nanorod arrays. Although controlling the spin coating process has a similar mechanism to controlling the concentration of colloid, it offers a convenient method to prepare a series of ZNAs with variable density. An annealing treatment of the substrate can influence the microstructure of the ZnO seed layer and then influence the density of the ZNAs.
通过水热法在不同条件下在预处理衬底上制备了密度可控的氧化锌纳米棒阵列（ZNAs）。通过扫描电子显微镜和X射线衍射系统地研究了衬底预处理条件对ZNAs密度控制的影响。结果表明，诸如氧化锌胶体浓度、旋涂次数和衬底退火处理等衬底预处理条件对ZNAs密度的控制有各自的影响。在衬底上引入氧化锌纳米颗粒层不仅有助于控制纳米棒密度，而且对纳米棒阵列的取向有很大影响。虽然控制旋涂过程与控制胶体浓度有类似的机制，但它提供了一种制备一系列密度可变的ZNAs的简便方法。对衬底进行退火处理会影响氧化锌籽晶层的微观结构，进而影响ZNAs的密度。
