Title :
Field emission of graphene-based materials
Author :
Yanan Zhao ; Linchuan Song ; Jianlong Liu ; Baoqing Zeng
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
We use chemical oxidation to make the gram scale graphene oxide and exfoliate the graphene from carbon fiber clothe. Then the graphene oxide is made as low operating electric field emitter by electrophoretic. Notably, the exfoliated graphene on carbon cloth has excellent field emission properties, with turn-on field at 0.4V/μm and threshold-field at 0.7V/μm. And aligned graphene sheets are horizontal layered to form flexible graphene paper, whose maximum emission current density was about 10A/cm2. The high emission current was attributed to the effects of the high aspect ratio of graphene sheets and aligned graphene sheets emission array.
Keywords :
current density; electrophoresis; field emitter arrays; graphene; graphene devices; materials preparation; oxidation; C; aligned graphene sheet emission array; carbon fiber clothe; chemical oxidation; electrophoresis; exfoliated graphene; field emission properties; flexible graphene paper; gram scale graphene oxide; graphene-based materials; high aspect ratio effects; low operating electric field emitter; maximum emission current density; threshold-field; turn-on field; Carbon dioxide; Current density; Electromagnetic heating; Graphene; Microwave filters; emission current; field emission; graphene;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2015 28th International
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4673-9356-0
DOI :
10.1109/IVNC.2015.7225544
