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

10 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
Externally publishedYes

Fingerprint

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.
@article{589733ca41f54b9abc04a163256b6697,
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",
year = "2010",
month = "3",
doi = "10.1016/j.carbon.2009.10.035",
language = "English",
volume = "48",
pages = "825--831",
journal = "Carbon",
issn = "0008-6223",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

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

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.

UR - http://www.scopus.com/inward/record.url?scp=71649092223&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71649092223&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2009.10.035

DO - 10.1016/j.carbon.2009.10.035

M3 - Article

AN - SCOPUS:71649092223

VL - 48

SP - 825

EP - 831

JO - Carbon

JF - Carbon

SN - 0008-6223

IS - 3

ER -