title: Cobalt-filled apoferritin for suspended single-walled carbon nanotube growth with narrow diameter distribution.
abstract: Cobalt-filled apoferritin (Co-ferritin) was, for the first time, used as a wet catalyst for the synthesis of single-walled carbon nanotubes (SWNTs) with narrow diameter distribution. Co-ferritins were spin-coated and converted to cobalt nanoparticles by calcination. Using chemical vapor deposition, suspended networks of SWNTs were formed on pillar-structured substrates. The suspended SWNTs show narrow tube diameter distribution with a relatively good graphite structure. By virtue of the low diffusion coefficient of cobalt, Co-ferritin might be more useful for narrow diameter SWNTs growth than ferritins, which encase iron particles.
authors.affiliation: NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan. jeong@will.brl.ntt.co.jp
authors.forename: Goo-Hwan
authors.initials: GH
authors.lastname: Jeong
authors.forename: Akira
authors.initials: A
authors.lastname: Yamazaki
authors.forename: Satoru
authors.initials: S
authors.lastname: Suzuki
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Yoshimura
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Homma
mesh_terms: D000818:Animals; D001052:Apoferritins / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D005293:Ferritins / Q000737:chemistry; D006736:Horses; D007501:Iron / Q000737:chemistry; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D037742:Nanotubes, Carbon; D003035:Cobalt; D005293:Ferritins; D001052:Apoferritins; D007501:Iron