| Project/Area Number |
11792003
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| Research Category |
Grant-in-Aid for University and Society Collaboration
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| Allocation Type | Single-year Grants |
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| Research Field |
表面界面物性
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| Research Institution | Mie University |
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Principal Investigator |
SAITO Yahachi MIE UNIVERSITY, DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING, PROFESSOR, 工学部, 教授 (90144203)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Hideki MIE UNIVERSITY, DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING, ASSISTANT PROFESSOR, 工学部, 助手 (40324545)
UEMURA Sashiro ISE ELECTRONICS, TECHNOLOGY RESEARCH LABORATORY, DIRECTOR, 技術部・取締役
HATA Koichi MIE UNIVERSITY, DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING, LECTURER, 工学部, 講師 (30228465)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Carbon nanotube / Field emission / Electron source / Current density / Brightness / Field ion microscopy / Pentagon / Light source |
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| Research Abstract |
Development of carbon nanotube (CNT) production and elucidation of fundamental properties of CNT field emitters were carried out with the aim of showing applicability of CNTs as field emission electron sources. Followings are the main achievement of the present study.
1. Growth conditions of CNTs
Growth conditions for obtaining high purity multiwall CNTs (MWCNTs) and special MWCNTs called nanografibers were found. Efficient catalysts such as Rh-Pt for synthesizing single-wall CNTs (SWCNTs) were also found.
2. Electron emission from clean MWNTs and the effects of adsorbates
Field emission occurred preferentially from carbon pentagons when the CNT surfaces were clean, while the enhanced emission was observed through adsorbates when the gas molecules were on the CNT tip.
3. Effect of ambient gases on the CNT field emitters
Among various ambient studied, oxygen, methane and carbon monoxide were the most hazardous gases degrading the electron emission from CNTs.
4. Energy distribution, brightness, and angular current density of CNT-electron sources
An electron energy distribution from one MWNT had a width of 330 meV. Emission current density and angular current density were respectively 10^8A/cm^2 and 10^<-7>A/sr, giving 10^<10>A/cm^2 sr as brightness at 100 kV acceleration.
5. Experimental fabrication of ultra-high luminance CNT light sources
The fabricated ultra-high luminance light-sources by using nanografibers showed 10^6 cd/m^2 at 30kV dc-driving, the brightness being more than 10 times higher than that manufactured previously.
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