首页 | 本学科首页   官方微博 | 高级检索  
     检索      

掺杂对碳纳米管拉曼光谱及场发射性能的影响
引用本文:李强,柳堃,李华洋,梁二军.掺杂对碳纳米管拉曼光谱及场发射性能的影响[J].光散射学报,2006,18(1):16-21.
作者姓名:李强  柳堃  李华洋  梁二军
作者单位:1. 郑州大学物理工程学院,材料物理教育部重点实验室,郑州,450052
2. 郑州大学物理工程学院,材料物理教育部重点实验室,郑州,450052;东华大学理学院应用物理系,上海,200051
基金项目:FundsforUniversityTalentsofHenanProvince(No.1999-125),FundsforNewlyIntroducedTalentsofDonghauUni-versity(No.2351038)
摘    要:采用高温热解法在860℃分别制备出了镓、氮以及硼和氮掺杂的碳纳米管,提纯后利用丝网印刷工艺分别将它们制备成薄膜,并测试了它们的拉曼光谱与场发射性能。测试结果表明,掺杂纳米管的缺陷密集度比纯碳纳米管明显增大,而它们的场致电子发射性能则与掺杂元素的性质密切相关。镓和氮掺杂的纳米管均具有非常优异的场发射性能,而硼和氮共掺杂的纳米管的场发射性能很差。掺杂引起碳纳米管费米能级附近能态密度的变化及功函数的降低是其具有优异场致电子发射性能的主要原因。

关 键 词:碳纳米管  掺杂  拉曼光谱  场发射
文章编号:1004-5929(2006)01-0016-06
收稿时间:2005/6/17
修稿时间:2005年6月17日

Effect of Doping on the Raman Spectral and Field Emission Properties of Carbon Nanotubes
LI Qiang,LIU Kun,LI Hua-yang,LIANG Er-jun.Effect of Doping on the Raman Spectral and Field Emission Properties of Carbon Nanotubes[J].Chinese Journal of Light Scattering,2006,18(1):16-21.
Authors:LI Qiang  LIU Kun  LI Hua-yang  LIANG Er-jun
Abstract:Pristine,nitrogen(N)-,nitrogen and boron(N+B)-,and gallium(Ga)-doped carbon nanotubes were synthesized by pyrolysis at 860℃ and purified.Thin films of the purified samples were fabricated by a screen-printing method.Raman spectroscopic and field emission properties of these films were studied.It is found that doping increases the density of defects of the nanotubes while the field electron emission property depends on the types of doped elements.N-and Ga-doped nanotubes have unique field electron emission properties but N and B co-doped samples are very poor emitters.The changes in the density of states near the Fermi level and in the work function are responsible for the differences in field emission properties of these films.
Keywords:Carbon nanotubes  Doping  Raman spectroscopy  Field emission
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号