摘要
采用水热法在PS模板上制备了不同的ZnO纳米阵列,通过控制反应时间得到不同长径比的ZnO纳米阵列,真空场发射测试表明,使用PS模板的ZnO纳米阵列的场发射性能得到改善,主要因为长纳米棒与短纳米管交叉两层的阵列结构导致屏蔽效应减弱。较长反应时间制备的ZnO纳米棒具有较大的长径比,场发射较好。多次重复场发射测试发现,本实验制备的ZnO纳米棒阵列的场发射稳定性不是很好,还需进一步改善。
We present ZnO nanostructure arrays synthesized with Polystyrene sphere（PS）assisted by hydrothermal method,and different length-diameter ratio ZnO nanostructures have been obtained with different reaction time.Field emission measurement showed the field emission properties of ZnO arrays with PS template were enhanced,which attribute to the decreased screening effect that results from the emergence of ZnO nanotube-nanorod hybrid arrays.With increase in hydrothermal reaction time,the field emission characteristics of as-synthesized ZnO arrays have remarkable enhancement because of the lager length-diameter ratio.Stability test showed that the field emission stability of preparated ZnO nanostructure arrays is not very good,and further research is needed.
基金
国家自然科学基金项目（编号：61076049）
关键词
ZNO纳米棒
阵列PS模板
场发射
屏蔽效应
ZnO nanostructure arrays
PS template
field emission
screening effect
