title: Growth mechanism and internal structure of vertically aligned single-walled carbon nanotubes.
abstract: An in situ optical absorbance technique was used to monitor the growth of vertically aligned single-walled carbon nanotubes (VA-SWNTs) at various temperatures and pressures. The effects of the growth temperature and ethanol pressure on the initial growth rate and catalyst lifetime were investigated. It was found that the ideal pressure for VA-SWNT synthesis changes with the growth temperature, shifting toward higher pressure as the growth temperature increases. It was also found that the growth reaction is first-order below this ideal pressure. Additionally, the internal structure of the VA-SWNT film was observed at different depths into the film by transmission electron microscopy. The absence of large bundles was confirmed, and little change in the structure was observed to a depth of approximately 1 microm.
authors.affiliation: Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Erik
authors.initials: E
authors.lastname: Einarsson
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kadowaki
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Ogura
authors.forename: Jun
authors.initials: J
authors.lastname: Okawa
authors.forename: Rong
authors.initials: R
authors.lastname: Xiang
authors.forename: Zhengyi
authors.initials: Z
authors.lastname: Zhang
authors.forename: Takahisa
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ikuhara
authors.forename: Shigeo
authors.initials: S
authors.lastname: Maruyama
mesh_terms: D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D037742:Nanotubes, Carbon