Title :
Vertically aligned graphene sheets grown on carbon nanotubes
Author :
Liu, Jianlong ; Zeng, Baoqing
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Vertically aligned graphene sheets were grown on carbon nanotubes by microwave-plasma enhanced chemical vapor deposition. Due to their high multistage enhancement and intrinsic low contact resistance, these graphene sheets resulted in good emission property. It was found that the turn-on field was 1.4V/μm, and the threshold-field corresponding to emission current density of 1mA/cm2 was about 2.9V/μm. The high enhancement factor was attributed to the effects of the high aspect ratio of graphene sheets and the geometry of carbon nanotubes.
Keywords :
carbon nanotubes; current density; electron field emission; graphene; plasma CVD; sheet materials; C; carbon nanotubes; emission current density; field emission; high aspect ratio; high enhancement factor; intrinsic low contact resistance; microwave-plasma enhanced chemical vapor deposition; multistage enhancement; threshold-field; turn-on field; vertically aligned graphene sheets; Carbon; Carbon nanotubes; Chemical vapor deposition; Chemicals; Current density; Substrates; carbon nanotube; field emisison; graphene;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2012 25th International
Conference_Location :
Jeju
Print_ISBN :
978-1-4673-1983-6
Electronic_ISBN :
pending
DOI :
10.1109/IVNC.2012.6316914
