title: Synthesis and Characterization of Carbon Nanofibers on Transition Metal Catalysts by Chemical Vapor Deposition.
abstract: Carbon nanofibers were synthesized on transition metal (Fe, Co, Cu) catalysts by Chemical Vapor Deposition (CVD). The variations of thickness and surface of the fibers were investigated according to the concentration of the transition metal. In order to prepare the metal catalysts for synthesis, transition metal nitrate and copper nitrate at a weight ratio were dissolved in distilled water. The obtained catalyst precipitates were filtered and then dried for more than 24 hours at 110 degrees C. Carbon nanofibers were synthesized by using ethylene gas of carbon source by CVD after pulverization of the fully-dried catalyst precipitates. They were characterized by SEM, EDS, Raman, XRD, XPS and TG/DTA, and their specific surface area was measured by BET. The characteristics of the synthesized carbon nanofibers were greatly influenced by the concentration ratio of the metal catalysts. Especially, uniform carbon nanofibers grew when the concentration ratio of Fe and Cu was 7:3, and that of Co and Cu was 6:4. Carbon nanofibers synthesized under such concentration conditions had the best crystallizability, compared to carbon nanofibers synthesized with metal catalysts of different concentration ratios, and revealed high amorphicity as well as high specific surface area.
authors.forename: Yura
authors.initials: Y
authors.lastname: Hyun
authors.forename: Eun-Sil
authors.initials: ES
authors.lastname: Park
authors.forename: Karina
authors.initials: K
authors.lastname: Mees
authors.forename: Ho-Seon
authors.initials: HS
authors.lastname: Park
authors.forename: Monika
authors.initials: M
authors.lastname: Willert-Porada
authors.forename: Chang-Seop
authors.initials: CS
authors.lastname: Lee