摘要
利用极其简单的方法，即将氯化锌溶液和氨水按一定配比混合进行水浴加热制备了ZnO纳米棒，其直径约为100nm。利用扫描电子显微镜和能谱仪对其结构和成分进行了分析。场发射测试结果表明，所制备的ZnO纳米棒有较低的开启场和阈值场，分别为2．7V／μm和4．95V／μm，其场增强因子为5390。这样高的场增强因子来源于氧化锌参差的层状结构。
An extremely simple method has been successfully employed to prepare ZnO nanorods. ZnO nanorods with the diameter of about 100nm are prepared by hydrothermal growth in solutions of ammonia and zinc chloride, and the field emission properties are tested. The low values of turn-on field and threshold field are 2. 7V/μm and 4. 95V/μm, respectively, which are achieved from these nanorods. A high field enhancement factor of 5390 is due to the hierarchical structure of ZnO nanorods. The morphology and the composition of ZnO nanorods are characterized by SEM and EDS.
关键词
ZnO纳米捧
场发射
水热法
ZnO nanorods, field emission, hydrothermal method
