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  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Enhanced field emission from the side wall of SWNTs coated on vertically aligned MWNT arrays

등록일
2008년 2월 13일 13시 05분 03초
접수번호
1101
발표코드
29P44포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅴ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
정현영, 정성미, 서정쌍
서울대학교 화학부,
Vertically aligned multiwalled carbon nanotube (MWCNT) arrays were fabricated on an anodic aluminum oxide membrane bonded to a Si wafer. After obtaining a protruding tip for the MWCNTs by etching away some oxide, they were used as electrodes in the fabrication of carbon nanotube field emitters. Long single-walled carbon nanotubes (SWCNTs) were spin coated on the MWCNT arrays of uniform height. Clean SWCNTs were suspended by attaching them to the tips of the vertically aligned MWCNT arrays. The spin coated SWCNTs function as emitters, while the MWCNT arrays function as electrodes. The field emission was greatly improved by coating gold on the MWCNT arrays and annealing at 400 C. Our field emitter exhibits good field emission properties such as a low turn-on field (1.4 V/um), very high current density (122 mA/cm^2), and long-term stability (55 h for 10 % degradation of current density from 400 uA/cm^2).

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