Low-temperature synthesis of multiwalled carbon nanotubes by graphite antenna CVD in a hydrogen-free atmosphere

Daisuke Yokoyama, Takayuki Iwasaki, Kentaro Ishimaru, Shintaro Sato, Mizuhisa Nihei, Yuji Awano, Hiroshi Kawarada

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Multiwalled carbon nanotubes (MWCNTs) were synthesized at 390 °C in a hydrogen-free atmosphere by graphite antenna chemical vapor deposition, which provides carbon radicals by the etching of the antenna itself in a He- or Ar-based noble gas plasma. An increase in the number of defects in the graphite layers of the CNTs was observed with increasing hydrogen partial pressure. The results of X-ray photoelectron spectroscopy analysis suggested that these defects were caused by the transformation from an sp2 to an sp3 structure in the graphite layers of CNTs due to hydrogen radicals.

    Original languageEnglish
    Pages (from-to)825-831
    Number of pages7
    JournalCarbon
    Volume48
    Issue number3
    DOIs
    Publication statusPublished - 2010 Mar

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    Graphite
    Multiwalled carbon nanotubes (MWCN)
    Hydrogen
    Chemical vapor deposition
    Antennas
    Noble Gases
    Defects
    Inert gases
    Partial pressure
    Temperature
    Etching
    Carbon
    X ray photoelectron spectroscopy
    Plasmas

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Low-temperature synthesis of multiwalled carbon nanotubes by graphite antenna CVD in a hydrogen-free atmosphere. / Yokoyama, Daisuke; Iwasaki, Takayuki; Ishimaru, Kentaro; Sato, Shintaro; Nihei, Mizuhisa; Awano, Yuji; Kawarada, Hiroshi.

    In: Carbon, Vol. 48, No. 3, 03.2010, p. 825-831.

    Research output: Contribution to journalArticle

    Yokoyama, Daisuke ; Iwasaki, Takayuki ; Ishimaru, Kentaro ; Sato, Shintaro ; Nihei, Mizuhisa ; Awano, Yuji ; Kawarada, Hiroshi. / Low-temperature synthesis of multiwalled carbon nanotubes by graphite antenna CVD in a hydrogen-free atmosphere. In: Carbon. 2010 ; Vol. 48, No. 3. pp. 825-831.
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    AU - Nihei, Mizuhisa

    AU - Awano, Yuji

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