氧化锌纳米草阵列的制备、结构及场发射性能研究

In this paper, ZnO nanograss array is fabricated on silicon substrates using thermal chemical vapor transport and condensation (CVTC) with gold nanoparticles as metal catalyst. It is found that the alloying cataly droplets are located at the tip of ZnO nanograsses, impling the growth of ZnO nanograss array is a typical vapor- liquid- solid process. In the growth process, the higher ZnO concentration of the growth ambience is suggested to plays a crucial role for the formation of ZnO nanograsses. The luminescence spectrum prove that ZnO nanograss array has good crystallinity. The field emission property of as- prepared ZnO nanograss arrays are characterized. The low turn- on electronic field and the higher current density are achieved with ZnO nanograss arrays as the emitters. It was suggested that the morphology, structure and distribution density of ZnO nanograss arrays play a crucial role for its excellent field emission property.