Gong Maogang, Xu Xiaoliang, Yang Zhou, Liu Yansong, Lv Haifei, Liu Ling
Department of Physics, University of Science and Technology of China, Hefei 230026, China.
J Nanosci Nanotechnol. 2010 Nov;10(11):7762-5. doi: 10.1166/jnn.2010.2856.
Well aligned ZnO nanowire arrays with high crystal quality were grown on Si substrates at a low temperature (50 degrees C) by hydrothermal method using a pre-formed ZnO seed layer. ZnO seeds were prepared via radio-frequency magnetron sputtering onto Si substrates. The morphologies of the ZnO nanowire arrays were shown by field emission scanning electron microscopy. X-ray diffraction spectra showed that the full width at the half maximum of the (0002) peak of the nanowire arrays without any heat treatment was only 0.07 degrees, indicating very high crystal quality. Furthermore, the room-temperature photoluminescence spectra of the ZnO nanowire arrays exhibited excellent UV emission. The special micro/nano surface structure of the ZnO nanowire arrays can enhance the dewettability for surfaces modified via low surface energy materials such as long chain fluorinated organic compounds. The surface of the ZnO nanowire arrays is also found to be superhydrophobic with a contact angle of 165 degrees +/- 1 degrees, while the sliding angle is 3 degrees.
通过水热法，利用预先形成的ZnO籽晶层，在低温（50摄氏度）下于硅衬底上生长出了晶体质量高且排列良好的ZnO纳米线阵列。ZnO籽晶是通过射频磁控溅射制备到硅衬底上的。用场发射扫描电子显微镜展示了ZnO纳米线阵列的形貌。X射线衍射光谱表明，未经任何热处理的纳米线阵列（0002）峰的半高宽仅为0.07度，这表明其晶体质量非常高。此外，ZnO纳米线阵列的室温光致发光光谱呈现出优异的紫外发射。ZnO纳米线阵列特殊的微/纳表面结构能够增强通过长链氟化有机化合物等低表面能材料修饰的表面的去湿性。还发现ZnO纳米线阵列的表面具有超疏水性，接触角为165度±1度，而滑动角为3度。
