摘要
结合丝网印刷和过滤阴极真空电弧法、离子束溅射方法,在普通玻璃衬底上制备催化剂图案,采用低温热化学气相沉积法(CVD)生长碳纳米管/纤维(CNTs)薄膜.研究了不同种类催化剂对CNTs薄膜生长及其场发射的影响.结果表明,在a-C:Co,Ni-Cu和Cu三种催化剂上没有获得明显的CNTs,在外加电场小于4.4V/μm时没有观察到场发射;而在Ni-Fe及Ni-Cr两种催化剂上获得了大量的CNTs,并且表现出良好的场发射性能,开启电场为2.5V/μm.这种热CVD有简单、低温等优点,在CNTs场发射显示器的阴极制备中有潜在的应用价值.
Carbon nanotubes/nanofibers（CNTs）were grown on sodalime glass by low temperature chemical vapor deposition.The catalytic films were pre-patterned using screen-printing method,combined with filtered cathodic vacuum arc or ion beam sputtering.The effect of different catalysts on the CNT growth and field emission were investigated.For samples catalyzed with a-C：Co,Ni-Cu or Cu,no CNTs are formed,and they show no field emission below the applied field of 4.4V/μm.For samples catalyzed with Ni-Fe or Ni-Cr,large amounts of entangled CNTs are successfully obtained and exhibit good electron emission,having a turn-on field as low as 2.5V/μm.The process,due to its simplicity and relatively low growth temperature,is promising for practical application in field emission display.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期6705-6711,共7页
Acta Physica Sinica
基金
上海市科委纳米专项项目(批准号:0114nm056
0452nm048)
教育部重点项目(批准号:02105)资助的课题.~~
关键词
化学气相沉积
场致发射
碳纳米管
扫描电子显微镜
chemical vapor deposition,field emission,carbon nanotubes,scanning electron microscopy
