Ultra-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources

Hisashi Sugime; Toshihiro Sato; Rei Nakagawa; Tatsuhiro Hayashi; Yoku Inoue; Suguru Noda

doi:10.1016/j.carbon.2020.10.066

Ultra-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources

Hisashi Sugime^*, Toshihiro Sato, Rei Nakagawa, Tatsuhiro Hayashi, Yoku Inoue, Suguru Noda

^*Corresponding author for this work

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

31 Citations (Scopus)

Abstract

A carbon nanotube forest with a length of 14 cm grew with an average growth rate of 1.5 μm s⁻¹ and a growth lifetime of 26 h. Several key factors to realize this unprecedented long growth such as catalyst conditions, growth conditions in chemical vapor deposition, and reactor system were clarified. It was found that the combination of the catalyst system of iron/gadolinium/aluminum oxide (Fe/Gd/Al₂O_x) and the in situ supplements of Fe and Al vapor sources at very low concentration was crucially important. A cold-gas system, where only the substrate is heated while keeping the gas at room temperature, was employed to suppress unnecessary reactions and depositions. The long carbon nanotube forest enabled macroscopic measurements of the tensile and electrical properties of the carbon nanotube wires, and it gave several important insights for industrial applications of the carbon nanotubes in the future.

Original language	English
Pages (from-to)	772-780
Number of pages	9
Journal	Carbon
Volume	172
DOIs	https://doi.org/10.1016/j.carbon.2020.10.066
Publication status	Published - 2021 Feb

Keywords

Catalyst
Chemical vapor deposition
Gadolinium
Growth termination
Vertically aligned carbon nanotube forest

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

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10.1016/j.carbon.2020.10.066

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title = "Ultra-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources",

abstract = "A carbon nanotube forest with a length of 14 cm grew with an average growth rate of 1.5 μm s−1 and a growth lifetime of 26 h. Several key factors to realize this unprecedented long growth such as catalyst conditions, growth conditions in chemical vapor deposition, and reactor system were clarified. It was found that the combination of the catalyst system of iron/gadolinium/aluminum oxide (Fe/Gd/Al2Ox) and the in situ supplements of Fe and Al vapor sources at very low concentration was crucially important. A cold-gas system, where only the substrate is heated while keeping the gas at room temperature, was employed to suppress unnecessary reactions and depositions. The long carbon nanotube forest enabled macroscopic measurements of the tensile and electrical properties of the carbon nanotube wires, and it gave several important insights for industrial applications of the carbon nanotubes in the future.",

keywords = "Catalyst, Chemical vapor deposition, Gadolinium, Growth termination, Vertically aligned carbon nanotube forest",

author = "Hisashi Sugime and Toshihiro Sato and Rei Nakagawa and Tatsuhiro Hayashi and Yoku Inoue and Suguru Noda",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Number 19K22090 . The authors thank S. Enomoto at Kagami Memorial Research Institute for Materials Science and Technology, Waseda University for TEM observation. The authors also thank B. Chen of Noda-Hanada lab at Waseda University for TG-DTA data acquisition. Funding Information: This work was supported by JSPS KAKENHI Grant Number 19K22090. The authors thank S. Enomoto at Kagami Memorial Research Institute for Materials Science and Technology, Waseda University for TEM observation. The authors also thank B. Chen of Noda-Hanada lab at Waseda University for TG-DTA data acquisition. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

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doi = "10.1016/j.carbon.2020.10.066",

language = "English",

volume = "172",

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AU - Sugime, Hisashi

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AU - Inoue, Yoku

AU - Noda, Suguru

N1 - Funding Information: This work was supported by JSPS KAKENHI Grant Number 19K22090 . The authors thank S. Enomoto at Kagami Memorial Research Institute for Materials Science and Technology, Waseda University for TEM observation. The authors also thank B. Chen of Noda-Hanada lab at Waseda University for TG-DTA data acquisition. Funding Information: This work was supported by JSPS KAKENHI Grant Number 19K22090. The authors thank S. Enomoto at Kagami Memorial Research Institute for Materials Science and Technology, Waseda University for TEM observation. The authors also thank B. Chen of Noda-Hanada lab at Waseda University for TG-DTA data acquisition. Publisher Copyright: © 2020 Elsevier Ltd

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Ultra-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources

Abstract

Keywords

ASJC Scopus subject areas

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