氧化锌与定向碳纳米管复合纳米结构设计与场发射性能研究

摘要

考虑到目前方法制备出的氧化锌碳纳米管复合结构多为随机取向,会在一定程度上影响其场发射性能,例如发射电流稳定性、寿命等性能方面,提出了一种氧化锌纳米线与定向碳纳米管复合纳米结构阵列的制备方法,并制备出了相应的结构体.模拟计算和测试结果表明文中制备出的复合纳米结构阵列改善了单一纳米结构的场发射性能.与单纯碳纳米管阵列相比,开启场强下降了70％,阈值电压下降了50％,而且发射电流密度更大,稳定性更高.%Most of previously reported Zinc Oxide nanostructure/Carbon Nanotubes compounds are randomly oriented,which will limit their field emission properties,such as stability and lifetime. A structure composed of Zinc Oxide nanowires grown on an aligned Carbon nanotubes array was fabricated. Simulation and experiment results show that this structure appears enhanced field emission performance. Compared to bare aligned carbon nanotubes array, the turn-on field of the compound structure reduces 70% , while the threshold field reduces 50%. Additionally, the emission current density and stability are also improved.