A carbon nanotube field emitter formed on W-wire with high current density for X-ray source

Author

Jun-Tae Kang ; Jae-Woo Kim ; Jin-Woo Jeong ; Hyeong-Rag Lee ; Yoon-Ho Song

Author_Institution

Electron. & Telecommun. Res. Inst., Daejeon, South Korea

fYear

2010

fDate

14-16 Oct. 2010

Firstpage

313

Lastpage

314

Abstract

Field emission micro-focus X-ray source based on carbon nanotube (CNT) has attractive features for biomedical or clinical imaging. X-ray sources for micro-focus and/or miniature tube types require a mini-sized, high-density emission current in the order of 10²_~10³ mA/cm². We have previously reported that the optimized paste composition with a nano-scale metal filler enhanced adhesion between CNT emitter and cathode electrode at low temperature. In this study, a CNT-on-Tip cathode, having CNT emitter on a tungsten (W) wire of 100 μm in diameter, was developed in order to increase emission current density.

Keywords

adhesion; carbon nanotubes; cathodes; current density; electron field emission; nanofabrication; tungsten; wires; C; W; biomedical imaging; carbon nanotube field emitter; cathode electrode; clinical imaging; field emission microfocus X-ray source; high-density emission current; miniature tube type; nanoscale metal filler enhanced adhesion; optimized paste composition; size 100 mum; tungsten wire; Three dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International

Conference_Location

Nanjing

Print_ISBN

978-1-4244-6645-0

Type

conf

DOI

10.1109/IVESC.2010.5644316

Filename

5644316