title: A perfect carbon nanotube with two closed ends.
abstract: A perfect carbon nanotube with two closed ends consisting of graphitized carbon was experimentally observed. The large carbon nanotube, with a diameter of 187 nm and a length of 1.2 microns, was synthesized by pyrolysis of iron(II) phthalocyanine (FePc) under an Ar/NH3 flow at 900 degrees C on a nickel substrate. The structure and composition of the nanotube were determined by high-resolution transmission electron microscopy and electron energy loss spectroscopy. The carbon nanotube seems to grow spontaneously by some autocatalytic process.
authors.affiliation: Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
authors.forename: Xianbao
authors.initials: X
authors.lastname: Wang
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Daoben
authors.initials: D
authors.lastname: Zhu
mesh_terms: D003460:Crystallization / Q000379:methods*; D006358:Hot Temperature; D008422:Materials Testing / Q000379:methods*; D008854:Microscopy, Electron; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000302:isolation & purification; D009532:Nickel / Q000737:chemistry; D011786:Quality Control; D013057:Spectrum Analysis / Q000379:methods; D014835:Volatilization
chemical_list: D037742:Nanotubes, Carbon; D009532:Nickel