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

*この研究の対応する著者

研究成果: Article査読

10 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)772-780
ページ数9
ジャーナルCarbon
172
DOI
出版ステータスPublished - 2021 2月

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)

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