Field emission and growth mechanism of ZnO microrods array with nanospikes fabricated by thermal evaporation

摘要

Well aligned ZnO microrods array with nanospikes are fabricated on silicon substrate using thermal chemical vapor transport. The field emission property of samples is characterized. The low turn-on electronic field and the high current density are achieved with ZnO microrods array with nanospikes as the emitters. It is suggested that the special morphology of samples play a crucial role for its excellent field emission property, and the samples can be a promising candidate for an emitter. The growth mechanism of samples can be explained by the combination of vapor-solid (VS) and secondary nucleation processes. (C) 2016 Elsevier B.V. All rights reserved.