Author/Authors :
Jiang، نويسنده , , Jun and Zhang، نويسنده , , Jihua and Feng، نويسنده , , Tao and Jiang، نويسنده , , Bingyao and Wang، نويسنده , , Yongjin and Zhang، نويسنده , , Fumin and Dai، نويسنده , , Lijuan and Wang، نويسنده , , Xi and Liu، نويسنده , , Xianghuai and Zou، نويسنده , , Shichang، نويسنده ,
Abstract :
Plasma-enhanced chemical vapor deposition (PECVD) method was employed to synthesize the Fe-catalyzed carbon nanotubes (CNTs). Hf films were deposited onto the synthesized CNTs, followed by heat treatment at 1200 °C which could form HfC. Field emission properties indicate that the HfC-coated CNTs have good emission current density due to low work function of HfC and also keep stable emission characteristics under poor vacuum owing to the chemical inertness of HfC. Consequently, field emission characteristics of the CNTs can be improved by the HfC-coated surface treatment compared with the synthesized CNTs.
Keywords :
D. Chemical vapor deposition , A. Carbon nanotubes , A. HfC , D. Field emission
