【作者】 于利刚； 柴扬； 张耿民；

【Author】 Yu Ligang,Chai Yang and Zhang Gengmin (Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China)

【机构】 北京大学信息科学技术学院电子学系教育部纳米器件物理与化学重点实验室；

【摘要】 本文研究碳纳米管和聚苯胺混合物的场发射。用N-甲基吡咯烷酮溶解的聚苯胺和单壁碳纳米管混合溶液滴在硅片上,在垂直于样品平面的稳恒静电场的作用下,制成了不连续的薄膜。薄膜由尺寸在(2-5)μm的岛组成,分布比较均匀。测试其场发射特性,开启电场(10μA/cm2)为8．06 V/μm。经过计算,得到升压过程和降压过程的场增强因子β分别为8．3 ×102和1．1×103。用透明阳极技术观测其场发射中心分布,荧光屏上的像点比较均匀,没有观察到明显的屏蔽效应。更多还原

【Abstract】 Field emission of single-walled carbon nanotubes (SWCNTs) and polyaniline mixture was studied. We first dissolved the SWC-NTs and polyaniline in N-methy-2-pyrrolidone (NMP). Next, we put a few drops of the solution on Si wafer and apply electrical field normal to the wafer surface. Finally let it dry for several days in air. Large number of small islands,2 to 5 μm in diameter,formed uniformly on the wafer surface.The onset field of the islands in field emission was found to be 8.1 V/μm.Interesting finding is that no screening effect was observed on phosphorus screen,and its field emission is better than that of the continuous film. Moreover,external electric field applied in film growth considerably improves its field emission characteristics.更多还原