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采用简单的热蒸发方法,不使用任何催化剂,在硅基底上制备出了两种垂直于基底、整齐排列的氧化锌纳米针阵列.它们具有均匀的分布以及一致的取向和高度.场发射性能研究表明它们同时具有较低的开启和阈值场强,稳定的发射电流和长时间维持发射的能力.较低的开启和阈值场强来源于它们较高的长径比和较细的尖端;稳定发射电流和长时间维持发射的能力来源于它们在基底上均匀一致的分布以及由于较粗的根部带来的与基底的良好接触.实验结果表明整齐的氧化锌针状纳米结构阵列是一种理想的平面场发射材料.
Using a simple thermal evaporation method, two arrays of ZnO nanowire arrays, perpendicular to the substrate and aligned, were prepared on a silicon substrate without the use of any catalyst, with uniform distribution and consistent orientation and height. Indicating that they have both low turn-on and threshold field strength, stable emission current and long-term ability to sustain emission.The lower turn-on and threshold field strengths derive from their higher aspect ratio and finer tip; stable emission Current and long-term ability to sustain emission stems from their uniform distribution on the substrate and good contact with the substrate due to thicker roots.The experimental results show that a neat array of zinc oxide needle nanostructures is an ideal Flat field emission material.