title: Structure and NIR feature of QCC: a laboratory analog of carbon dust.
abstract: We have produced thin films of quenched carbonaceous composite (QCC) by hydrocarbon plasma deposition. The effect of thermal annealing on QCC has been investigated to understand how QCC, as a laboratory analog of carbon dust, is transformed in the warm environment around evolved stars. Spectroscopic measurements have indicated that, by heating, the proportion of aromatic sp2 CH bonds increases relative to sp3 CH bonds. Carbon onion-like spherules of approximately 10 nm in diameter are found with electron microscopic images after "graphitization" of thermal annealing.
authors.affiliation: Department of Physics, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo, Kyoto, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Goto
authors.forename: T
authors.initials: T
authors.lastname: Maihara
authors.forename: H
authors.initials: H
authors.lastname: Terada
authors.forename: S
authors.initials: S
authors.lastname: Wada
authors.forename: C
authors.initials: C
authors.lastname: Kaito
authors.forename: S
authors.initials: S
authors.lastname: Kimura
mesh_terms: D055580:Astronomical Phenomena; D001256:Astronomy; D002244:Carbon / Q000737:chemistry*; D019443:Cosmic Dust; D005118:Extraterrestrial Environment; D006358:Hot Temperature; D006838:Hydrocarbons / Q000032:analysis / Q000138:chemical synthesis*; D008697:Methane / Q000737:chemistry; D008854:Microscopy, Electron; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D019443:Cosmic Dust; D006838:Hydrocarbons; D002244:Carbon; D008697:Methane