Near-edge x-ray absorption fine structure of ultrananocrystalline diamond/hydrogenated amorphous carbon films prepared by pulsed laser deposition

Tsuyoshi Yoshitake, Shinya Ohmagari, Akira Nagano, Sausan Al-Riyami, Ryota Ohtani, Hiroyuki Setoyama, Eiichi Kobayashi, Kunihito Nagayama

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    The atomic bonding configuration of ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a-C:H) films prepared by pulsed laser ablation of graphite in a hydrogen atmosphere was examined by near-edge X-ray absorption fine structure spectroscopy. The measured spectra were decomposed with simple component spectra, and they were analyzed in detail. As compared to the a-C:H films deposited at room substrate-temperature, the UNCD/a-C:H and nonhydrogenated amorphous carbon (a-C) films deposited at a substrate- temperature of 550 °C exhibited enhanced and CC peaks. At the elevated substrate-temperature, the and CC bonds formation is enhanced while the C-H and C-C bonds formation is suppressed. The UNCD/a-C:H film showed a larger C-C peak than the a-C film deposited at the same elevated substrate-temperature in vacuum. We believe that the intense C-C peak is evidently responsible for UNCD crystallites existence in the film.

    Original languageEnglish
    Article number876561
    JournalJournal of Nanomaterials
    Volume2009
    DOIs
    Publication statusPublished - Aug 10 2009

    Fingerprint

    Diamond
    Carbon films
    Amorphous carbon
    Amorphous films
    Pulsed laser deposition
    Diamonds
    X rays
    Substrates
    X ray absorption near edge structure spectroscopy
    Temperature
    Graphite
    Laser ablation
    Pulsed lasers
    Crystallites
    Hydrogen
    Vacuum
    Carbon

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)

    Cite this

    Near-edge x-ray absorption fine structure of ultrananocrystalline diamond/hydrogenated amorphous carbon films prepared by pulsed laser deposition. / Yoshitake, Tsuyoshi; Ohmagari, Shinya; Nagano, Akira; Al-Riyami, Sausan; Ohtani, Ryota; Setoyama, Hiroyuki; Kobayashi, Eiichi; Nagayama, Kunihito.

    In: Journal of Nanomaterials, Vol. 2009, 876561, 10.08.2009.

    Research output: Contribution to journalArticle

    Yoshitake, Tsuyoshi ; Ohmagari, Shinya ; Nagano, Akira ; Al-Riyami, Sausan ; Ohtani, Ryota ; Setoyama, Hiroyuki ; Kobayashi, Eiichi ; Nagayama, Kunihito. / Near-edge x-ray absorption fine structure of ultrananocrystalline diamond/hydrogenated amorphous carbon films prepared by pulsed laser deposition. In: Journal of Nanomaterials. 2009 ; Vol. 2009.
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    abstract = "The atomic bonding configuration of ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a-C:H) films prepared by pulsed laser ablation of graphite in a hydrogen atmosphere was examined by near-edge X-ray absorption fine structure spectroscopy. The measured spectra were decomposed with simple component spectra, and they were analyzed in detail. As compared to the a-C:H films deposited at room substrate-temperature, the UNCD/a-C:H and nonhydrogenated amorphous carbon (a-C) films deposited at a substrate- temperature of 550 °C exhibited enhanced and CC peaks. At the elevated substrate-temperature, the and CC bonds formation is enhanced while the C-H and C-C bonds formation is suppressed. The UNCD/a-C:H film showed a larger C-C peak than the a-C film deposited at the same elevated substrate-temperature in vacuum. We believe that the intense C-C peak is evidently responsible for UNCD crystallites existence in the film.",
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    AU - Yoshitake, Tsuyoshi

    AU - Ohmagari, Shinya

    AU - Nagano, Akira

    AU - Al-Riyami, Sausan

    AU - Ohtani, Ryota

    AU - Setoyama, Hiroyuki

    AU - Kobayashi, Eiichi

    AU - Nagayama, Kunihito

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