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

doi:10.1016/j.carbon.2009.10.035

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

研究成果: Article › 査読

14 被引用数 (Scopus)

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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.

本文言語	English
ページ（範囲）	825-831
ページ数	7
ジャーナル	Carbon
巻	48
号	3
DOI	https://doi.org/10.1016/j.carbon.2009.10.035
出版ステータス	Published - 2010 3月
外部発表	はい

ASJC Scopus subject areas

化学 (全般)
材料科学（全般）

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10.1016/j.carbon.2009.10.035

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

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.",

author = "Daisuke Yokoyama and Takayuki Iwasaki and Kentaro Ishimaru and Shintaro Sato and Mizuhisa Nihei and Yuji Awano and Hiroshi Kawarada",

note = "Funding Information: This work was completed as part of the MIRAI Project supported by NEDO. TEM observation was supported by Mineichi Fujiwara at Kagami Memorial Laboratory for Materials Science and Technology, Waseda University.",

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doi = "10.1016/j.carbon.2009.10.035",

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T1 - Low-temperature synthesis of multiwalled carbon nanotubes by graphite antenna CVD in a hydrogen-free atmosphere

AU - Yokoyama, Daisuke

AU - Iwasaki, Takayuki

AU - Ishimaru, Kentaro

AU - Sato, Shintaro

AU - Nihei, Mizuhisa

AU - Awano, Yuji

AU - Kawarada, Hiroshi

N1 - Funding Information: This work was completed as part of the MIRAI Project supported by NEDO. TEM observation was supported by Mineichi Fujiwara at Kagami Memorial Laboratory for Materials Science and Technology, Waseda University.

PY - 2010/3

Y1 - 2010/3

N2 - 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.

AB - 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.

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

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