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- Title
Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging.
- Authors
Gupta, Amar Prasad; Sangjun Park; Seung Jun Yeo; Jaeik Jung; Chonggil Cho; Sang Hyun Paik; Hunkuk Park; Young Chul Cho; Seung Hoon Kim; Ji Hoon Shin; Jeung Sun Ahn; Jehwang Ryu
- Abstract
We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic rectangular-rounded substrate with an area of 0.1377 cm² through a plasma enhanced chemical vapor deposition system. The stable field emission properties with triode electrodes after electrical aging treatment showed an anode emission current of 0.63 mA at a gate field of 7.51 V/μm. The 4.5-inch cubic shape open type X-ray system was developed consisting of an X-ray aperture, a vacuum part, an anode high voltage part, and a field emission electron gun including three electrodes with focusing, gate and cathode electrodes. Using this system, we obtained high-resolution X-ray images accelerated at 42-70 kV voltage by digital switching control between emitter and ground electrode.
- Subjects
CARBON nanotubes; X-ray imaging; DIAGNOSTIC imaging; FABRICATION (Manufacturing); ELECTRONS; ELECTRIC potential
- Publication
Materials (1996-1944), 2017, Vol 10, Issue 8, p878
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma10080878