利用微波等离子体化学气相沉积(MPCVD)方法,在不锈钢衬底上直接沉积碳纳米管膜.研究碳纳米管膜在放电过程中对其场发射性能的影响.通过XPS、Raman光谱等手段,分析碳纳米管膜在放电过程中sp2碳和sp3碳含量的变化,对碳纳米管膜场发射性能变化的根源进行研究.结果显示,在放电过程中,碳纳米管膜中sp2碳的含量减少,场发射性能变差.经过分析,我们认为发生这种现象的原因是:发射电子主要是从sp2碳发出的,sp2碳的减少直接影响了发射电子的减少,故其场发射性能降低.
参考文献
| [1] | Fan Z Q;Zhang B L;Yao N et al.Controlled Growth of Carbon Nanotubes and Its Fiied Emission Properties[J].Chinese Physics Letters,2003,20(11):1991. |
| [2] | Fan Z Q;Zhang B L;Yao N et al.Influence of Pretreatment Conditions of Stainless Steel Substrates on Field Emission Properties of the Carbon Nanotubes Films[J].Journal of Semiconductors,2004,25(11):1349. |
| [3] | Dean K A;Chalamala B R .Current Saturation Mechanism in Carbon Nanotube Field Emitters[J].Applied Physics Letters,2000,76:375. |
| [4] | 许宁生,陈岳,邓少芝,陈军,马旭村,王恩哥.A New Mechanism Responsible for the Enhancement of Local Electric Field on the Surface of Emitting Carbon Nanotubes[J].中国物理快报(英文版),2001(09):1278-1281. |
| [5] | Xu X P;Brandes G R .Effect of Nickel Thickness and Microwave Power on the Growth of Carbon Nanotubes by Microwave-heated Chemical Vapor Deposition[J].Applied Physics Letters,1999,74:2549. |
| [6] | Yu K.;Zhu ZQ.;Xu M.;Li Q.;Lu W. .Electron field emission from soluble carbon nanotube films treated by hydrogen plasma[J].Chemical Physics Letters,2003(1/2):109-114. |
| [7] | 秦玉香,胡明.电泳沉积碳纳米管的微波等离子体改性[J].无机材料学报,2008(03):515-518. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%