Moderating carbon supply and suppressing Ostwald ripening of catalyst particles to produce 4.5-mm-tall single-walled carbon nanotube forests

Kei Hasegawa, Suguru Noda*

*この研究の対応する著者

研究成果: Article査読

59 被引用数 (Scopus)

抄録

Millimeter-tall single-walled carbon nanotube (SWCNT) forests were grown by chemical vapor deposition (CVD) from C2H2/H 2O/Ar using Fe/Al-Si-O catalysts. Using combinatorial catalyst libraries coupled with real-time monitoring of SWCNT growth, the catalyst and CVD conditions were systematically studied. The keys for this growth are to maintain the C2H2 pressure below its upper limit to prevent the killing of the catalysts and to grow the SWCNTs before the catalyst particles lose their activity because of coarsening through Ostwald ripening. Lower temperatures lead to lower limits for the C2H2 pressure which result in lower growth rates but also lead to even lower coarsening rates which result in even longer growth lifetimes. Using these principles, we grew 4.5-mm-tall SWCNT forests in 2.5 h at 750 °C.

本文言語English
ページ(範囲)4497-4504
ページ数8
ジャーナルCarbon
49
13
DOI
出版ステータスPublished - 2011 11月
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)

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