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 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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