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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 115 - 119 (5page)
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A tip-type carbon nanotube(CNT)-based field emitter was studied to consider it as electron source for micro-focused x-ray tube. The CNT was grown directly on a metal (tungsten) substrate by using an inductively coupled plasma-chemical vapor deposition (ICP-CVD) method. Prior to CNT growth, the metal substrate was etched to have various tip angles from $10^{\circ}$ to $180^{\circ}C$ (flat-type). The morphologies and microstructures of all the grown CNTs were analyzed via field-emission SEM. Furthermore, the effects of substrate tip-angles on the emission properties of CNT-based field emitters were characterized to estimate the maximum current density, the turn-on voltage, and the spatial distribution of electron beams. Prolonged long-term stability testing of the CNT emitters was also performed. All the experiment results obtained from this study indicated why a tip-type CNT emitter, compared with a flat-type CNT emitter, would be more desirable for a micro-focused x-ray system, in terms of the emission current level, the focused beam area, and the emission stability.
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참고문헌 (8)
참고문헌 신청
H. Y. Jung / 200808 / Horizontally aligned single-walled carbon nanotube field emitters fabricated on vertically aligned multi-walled carbon nanotube electrode arrays / CARBON 46:1345~1349
E. Terrado / 2006 / Aligned carbon nanotubes grown on alumina and quartz substrates by a simple thermal CVD process / Diamond Relat. Mater 15:1059~2815
Z. Liu / 2006 / Development of a carbon nanotube based microfocus x-ray tube with single focusing electrode / Rev. Sci. Instrum 77:054302-1-6
S. H. Heo / 2007 / Transmission-type microfocus x-ray tube using carbon nanotube field emitters / Appl. Phys. Lett 90:183109-1-3
J. P. Kim / 200902 / Long-term stability of various carbon-nanotube-based micro-tip emitters / DIAMOND AND RELATED MATERIALS 18:486~489
E. Terrado / 2006 / Aligned carbon nanotubes grown on alumina and quartz substrates by a simple thermal CVD process / Diamond Relat. Mater 15:1059~2815
Z. Liu / 2006 / Development of a carbon nanotube based microfocus x-ray tube with single focusing electrode / Rev. Sci. Instrum 77:054302-1-6
S. H. Heo / 2007 / Transmission-type microfocus x-ray tube using carbon nanotube field emitters / Appl. Phys. Lett 90:183109-1-3
J. P. Kim / 200902 / Long-term stability of various carbon-nanotube-based micro-tip emitters / DIAMOND AND RELATED MATERIALS 18:486~489
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