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

doi:10.1143/JJAP.46.L399

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

204 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 language	English
Pages (from-to)	L399-L401
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	46
Issue number	17-19
DOIs	https://doi.org/10.1143/JJAP.46.L399
Publication status	Published - 2007 May 11
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.46.L399

Cite this

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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.",

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AU - Noda, Suguru

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AU - Sugime, Hisashi

AU - Kakehi, Kazunori

AU - Zhang, Zhengyi

AU - Maruyama, Shigeo

AU - Yamaguchi, Yukio

PY - 2007/5/11

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KW - Vertically aligned nanotubes

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

Abstract

Keywords

ASJC Scopus subject areas

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