Title :
Growth and Filed Emission of Tubular Carbon Cones
Author :
Li, J.J. ; Wang, Q. ; Gu, C.Z.
Author_Institution :
Inst. of Phys., Chinese Acad. of Sci., Beijing
Abstract :
A new tubular carbon cones (TCCs) were grown on the gold wires by hot filament chemical vapor deposition (HFCVD), having long-cone-shaped appearance with a herringbone hollow interior surrounded by helical sheets of graphite coiling around. It is considered to be a main result of TCCs formation that during growth the size of catalyst particle located in the top of TCCs is decreased continuously due to etching effect in the CVD plasma. In addition, these TCCs exhibited excellent field emission ability with a very low threshold field of 0.27 V/mum and a stable emitting current, which is attributed to its lower effective work function and the reduced screening effect
Keywords :
carbon; field emission; nanostructured materials; nanotechnology; particle size; plasma CVD coatings; sputter etching; work function; Au; C; CVD plasma etching; catalyst particle size; effective work function; emitting current; field emission; gold wires; helical graphite coiling sheets; herringbone hollow interior structure; hot filament chemical vapor deposition; screening effect; threshold field; tubular carbon cones; Carbon dioxide; Carbon nanotubes; Cathodes; Current density; Etching; Gold; Nanoscale devices; Plasma applications; Scanning electron microscopy; Wire;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International
Conference_Location :
Guilin
Print_ISBN :
1-4244-0401-0
DOI :
10.1109/IVNC.2006.335470
