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Vol.44, No.3, 192 ~ 199, 2006
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| Title |
| Effect of CNT Paste Materials and Gas Atmosphere on Field Emission and Degradation Properties in Carbon Nanotube Cathodes |
| 김동희 Dong Hee Kim , 김태식 Tae Sik Kim , 정원섭 Won Sug Chung , 김광호 Kwang Ho Kim , 손영국 Young Gook Son , 조영래 Young Rae Cho |
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| Abstract |
| The influence of bonding materials on the field emission of CNT(carbon nanotube) cathodes was investigated with respect to the vacuum level. The vacuum level was controlled by gases(O2, H2) exposure. An OCNT(organic binder with CNT) cathode and an ICNT(inorganic binder with CNT) cathode were fabricated using different composition of CNT pastes which have organic or inorganic bonding materials. The emission current decreased in the case of OCNT cathode but increased in the case of ICNT cathode as the vacuum level decreased from 10(-7) Torr to 10^(-4) Torr by the exposing oxygen. From this study, we found that the effect of surface cleaning, increasing emission current, by ion bombardment in the ICNT cathode was more dominant than adsorption but adsorption in the OCNT cathode was more dominant than ion bombardment. |
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| Key Words |
| Field emission, Paste material, Carbon nanotube, Degradation |
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