碳纳米片-碳纳米管复合材料的一步合成及其场发射性质研究  

One-step synthesis of a carbon nano sheet-scarbon nanotubes composite and its field emission properties

作　　者：胡小颖[1,2] 王淑敏[1] 裴艳慧[1] 田宏伟[1] 朱品文[3] 

机构地区：[1]吉林大学材料科学与工程学院,长春130012 [2]长春大学理学院,长春130022 [3]吉林大学,超硬材料国家重点实验室,长春130012

出　　处：《物理学报》2013年第3期429-433,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:51002061;51202017);吉林省自然科学基金(批准号:201115019;201215104);吉林大学超硬材料国家重点实验室开放基金(批准号:201215;201110)资助~~

摘　　要：利用等离子体化学气相沉积技术,在引入Ti过渡层后的Co膜表面一步制备出碳纳米片-碳纳米管复合材料,研究了Co膜厚度对复合材料形貌及场发射性质的影响.当Co薄膜厚度为11nm时,得到了垂直基片定向生长的碳纳米管和碳纳米片复合物,此时,碳纳米片分布在碳纳米管的管壁上和管的顶端,样品的场发射性能最佳.One-step synthesis of a carbon nano sheets-carbon nanotubes composite by plasma enhanced chemical vapor deposition and its field emission properties are investigated. We obtain the carbon nano sheets-carbon nanotube composite on the Co thin film with 20 nm Ti interlayer. We gain carbon nano sheets only on the Co thin films without Ti interlayer in the same growth conditions. The carbon nano sheets are distributed on the side wall and the top of carbon nanotubes. The Ti interlayer hinders the diffusion of Co into the silicon substrate and improves the catalytic capability of Co, thus it will help the growth of carbon nanotubes. When the thickness of Co film is 11 nm, the carbon nanotubes are vertically aligned on the flat Co film surface. Most of the carbon nano sheets are distributed on the top of the carbon nanotubes under this condition, which increases the number of emitters and enhances the field emission properties of the composites.

关 键 词：碳纳米片 碳纳米管 化学气相沉积 场发射 

分 类 号：TB383.1[一般工业技术—材料科学与工程]