| 학회 | 한국재료학회 |
| 학술대회 | 2006년 가을 (11/03 ~ 11/03, 수원대학교) |
| 권호 | 12권 2호 |
| 발표분야 | 나노 및 생체 재료 |
| 제목 | 탄소나노튜브/코발트 나노복합재료 전계방출에미터의 제조 및 특성평가 (Fabrication and Characterization of CNT/Co Nanocomposite Field Emitters) |
| 초록 | Since CNTs have relatively low threshold voltage and high current density owing to their high electric conductivity and high aspect ratio with a sharp top, researchers have been intensely focused on developing CNT-based field emission devices. However, CNTs deposited on substrates or metal electrodes using an arc discharge or chemical vapour deposition process are considered inadequate for large area display applications. Although researchers have proposed using screen printing of CNT pastes consisting of CNTs and inorganic frits for large area displays, critical problems remain, including low electric conductivity and weak bonding strength between screen-printed CNTs and metal layer. In order to overcome previously encountered problems and to utilize the advantages of a metal layer, to be efficient electron emitters, perpendicularly aligned CNTs must be implanted within continuous metal layer and simultaneously exposed to the surface. In this study, we fabricated pearl-necklace-structured CNT/Co powders, in which Co nanoparticles are threaded by CNTs. Furthermore, the CNTs straightened and were aligned perpendicular to the substrate after sintering process. The fabricated CNT/Co nanocomposite field emitters showed highly efficient field emission behavior and high stability. Therefore, the fabricated CNT/Co nanocomposite powders are considered to be promising for field emission device applications. This research was supported by a grant(F0004240-2006-22) from the Information Display R&D Center, one of the 21st Century Frontier R&D Program funded by the Ministry of Commerce, Industry and Energy of the Korean Government. |
| 저자 | Chan B. Mo, Seung I. Cha, Soon H. Hong |
| 소속 | 한국과학기술원 신소재공학과 |
| 키워드 | Carbon Nanotube; Nanocomposite; Field Emitter |
