Jung, Hyun-Seung Lee, Seung Yong Ahn, Jae-Pyoung Park, Jong-Ku 2024-01-21T02:30:30Z 2024-01-21T02:30:30Z 2021-08-31 2006-10 1598-9623 https://pubs.kist.re.kr/handle/201004/135096 Carbon nanofibers (CNFs) are synthesized by the dissociation of ethylene gas in the presence of Ni-Cu alloy catalysts; helical CNFs are favored by Ni-Cu alloy catalysts. The role of alloy compositions and reaction time in the morphology of CNFs were determined by varying both the Cu content in the alloy catalyst and the holding time at a particular synthesis temperature. The chemical composition, the size, and the shape of the catalyst particles were shown to affect the morphology of CNFs. Two kinds of growth mechanism are suggested to explain the growth of helical and straight CNFs. English KOREAN INST METALS MATERIALS FORMATION MECHANISM FILAMENTOUS CARBON DECOMPOSITION NICKEL ACETYLENE METHANE DEPOSITION PYROLYSIS NANOTUBES NANOCOILS Growth of helical carbon nanofibers in the presence of Ni-Cu catalysts Article 10.1007/BF03027709 1 METALS AND MATERIALS INTERNATIONAL, v.12, no.5, pp.417 - 423 METALS AND MATERIALS INTERNATIONAL 12 5 417 423 scie scopus kci ART001025937 000241566900008 2-s2.0-33751028436 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article FORMATION MECHANISM FILAMENTOUS CARBON DECOMPOSITION NICKEL ACETYLENE METHANE DEPOSITION PYROLYSIS NANOTUBES NANOCOILS carbon nanofibers catalytically grown carbon vapor grown carbon pyrolysis