이교우 정종수 강경태 황정호 2024-01-21T06:32:47Z 2024-01-21T06:32:47Z 2021-09-06 2004-09 1226-4881 https://pubs.kist.re.kr/handle/201004/137260 The synthesis of Ni-catalyzed multi-walled carbon nanotubes and nanofibers on a catalytic metal substrate, using an ethylene fueled inverse diffusion flame as a heat source, was investigated. When the gas temperature was varied from 1,400K to 900K, approximately, carbon nanotubes with diameters of 2060nm were formed on the substrate. In the regions where the gas temperature was higher than 1,400K or lower than 900K, iron nanorods or carbon nanofibers were synthesized, respectively. Based on the quantitative analyses of large amount of SEM and TEM images, the nanotubes formed closer to the flame had a tendency of having larger diameters. HR-TEM images and Raman spectra revealed that carbon nanotubes synthesized had multi-walled structures with some defective graphite layers at the wall. Based on the graphite mode of the Raman spectra, it was believed that the optimal synthesis could be obtained as the substrate was positioned at between 5.5mm and 5.0mm, from the flame axis. 대한기계학회 에틸렌 역확산화염을 열원으로 사용하여 촉매금속 기판 상에 합성한 탄소나노튜브와 탄소나노섬유 Synthesis of Multi-Walled Carbon Nanotubes and Nanofibers on a Catalytic Metal Substrate Using an Ethylene Inverse Diffusion Flame as a Heat Source Article 2 대한기계학회논문집 B, v.28, no.9, pp.1081 - 1092 대한기계학회논문집 B 28 9 1081 1092 kci ART001093593 Flame Synthesis(화염합성) Multi-Walled Carbon Nanotubes(다중벽 탄소나노튜브) Carbon Nanofibers(탄소나노섬유) Catalytic Metal Substrate(촉매금속 기판) Flame Synthesis(화염합성) Multi-Walled Carbon Nanotubes(다중벽 탄소나노튜브) Carbon Nanofibers(탄소나노섬유) Catalytic Metal Substrate(촉매금속 기판)