Millimeter-thick single-walled carbon nanotube forests: Hidden role of catalyst support

Suguru Noda, Kei Hasegawa, Hisashi Sugime, Kazunori Kakehi, Zhengyi Zhang, Shigeo Maruyama, Yukio Yamaguchi

Research output: Contribution to journalArticle

173 Citations (Scopus)

Abstract

A parametric study of so-called "super growth" of single-walled carbon nanotubes (SWNTs) was done by using combinatorial libraries of iron/aluminum oxide catalysts. Millimeter-thick forests of nanotubes grew within 10 min, and those grown by using catalysts with a thin Fe layer (about 0.5 nm) were SWNTs. Although nanotube forests grew under a wide range of reaction conditions such as gas composition and temperature, the window for SWNT was narrow. Fe catalysts rapidly grew nanotubes only when supported on aluminum oxide. Aluminum oxide, which is a well-known catalyst in hydrocarbon reforming, plays an essential role in enhancing the nanotube growth rates.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number17-19
DOIs
Publication statusPublished - 2007 May 11
Externally publishedYes

Fingerprint

Single-walled carbon nanotubes (SWCN)
Catalyst supports
Nanotubes
nanotubes
carbon nanotubes
catalysts
Catalysts
aluminum oxides
Aluminum
Oxides
gas composition
Reforming reactions
gas temperature
iron oxides
hydrocarbons
Hydrocarbons
Iron
Chemical analysis
Gases
Temperature

Keywords

  • Combinatorial method
  • Growth mechanism
  • Single-walled carbon nanotubes
  • Vertically aligned nanotubes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Millimeter-thick single-walled carbon nanotube forests : Hidden role of catalyst support. / Noda, Suguru; Hasegawa, Kei; Sugime, Hisashi; Kakehi, Kazunori; Zhang, Zhengyi; Maruyama, Shigeo; Yamaguchi, Yukio.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 46, No. 17-19, 11.05.2007.

Research output: Contribution to journalArticle

Noda, Suguru ; Hasegawa, Kei ; Sugime, Hisashi ; Kakehi, Kazunori ; Zhang, Zhengyi ; Maruyama, Shigeo ; Yamaguchi, Yukio. / Millimeter-thick single-walled carbon nanotube forests : Hidden role of catalyst support. In: Japanese Journal of Applied Physics, Part 2: Letters. 2007 ; Vol. 46, No. 17-19.
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