高质量四脚状ZnO纳米结构的制备及其影响因素

采用汽相传输法制备高质量四脚状ZnO纳米结构(T-ZnO).以ZnO纳米晶为同质催 化剂,在锌源-衬底间添加蒸汽过滤器,研究过滤器和纳米晶对产物组成和形态的影响,以及 T-ZnO的结构特征.实验结果表明,T-ZnO为纤锌矿结构,分布均匀、尺寸一致,由四个柱 状纳米棒和一个球形核心组成.纳米棒直径约为60nm,沿<0001>晶向生长.过滤器的使用可 有效地去除产物中颗粒,而ZnO纳米晶的使用明显降低其尺寸,提高其均匀性.

Synthesis and Influence Factors of High-quality Tetrapodlike ZnO Nanostructures

High-quality tetrapodlike ZnO nanostructures (T-ZnO) were synthesized by a vapor transport method, in which ZnO nanocrystals were used as homogeneous catalyst and a vapor filter was placed between the source and the substrate. The microstructure of T-ZnO and the effects of the filter and ZnO nanocrystals on the constitute and morphology of the products were investigated. Results show that T-ZnO is uniform and evenly distributing, constituted by four pillarlike nanorods and a spheral core. All components are wurtzite structure. The diameter of nanorods is 60nm, growing along <0001> direction. The use of filter leads to the effective remove of the particles in the products. ZnO nanocrystals are beneficial to reduce the size and improve the uniformity of the product.