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Growth of long carbon nantotube forest by controlling growth termination

Research Project

Project/Area Number 19K22090
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 27:Chemical engineering and related fields
Research InstitutionWaseda University

Principal Investigator

Sugime Hisashi  早稲田大学, 理工学術院総合研究所(理工学研究所), 次席研究員(研究院講師) (60716398)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsカーボンナノチューブ / 化学気相成長 / スパッタ / 触媒 / 化学気相成長法 / 薄膜 / スパッタリング
Outline of Research at the Start

カーボンナノチューブ(CNT)は、高い機械的強度や電気・熱伝導性など極めて優れた特性を有し、幅広い産業での応用が期待されている。一方で、用途に応じた合成制御ができていないことが実用化を妨げており、例えばフォレストの成長停止が長尺化を妨げている。現在までの最長のCNTフォレストは約2cmであり、導電性ワイヤなどの応用において本来の引張強度や導電性を示さない。本研究では、新規触媒の開発と反応系の設計を行い、成長停止しない数十cmのフォレスト(既存の10倍以上)の合成技術を開発し数十cmのCNTフォレストの合成を目指す。

Outline of Final Research Achievements

A carbon nanotube forest with a length of 14 cm grew with an average growth rate of 1.5 um 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. The cold-gas system where only the substrate is heated while keeping the gas temperature 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.

Academic Significance and Societal Importance of the Research Achievements

炭素のみから成るカーボンナノチューブ(CNT)は、貴金属などのように原料の枯渇の懸念がなく、強靭でありながら高い電気伝導性や熱伝導性を持つことから産業応用が期待されているものの、効率よく合成する手法や機能を引き出す構造制御に課題がある。本研究ではCNTの成長が自発的に停止してしまう問題に着目し、原因を突き止めると共に、それを解決する新たな手法を開発した。これまで2 cm程度が最長であったCNTフォレストの合成を14 cmまで持続させることに成功し、大量合成などにつながる新たな知見が得られた。今後更なる技術開発により、持続可能な社会における重要な素材として使われる材料になることが期待できる。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results) Remarks (3 results) Patent(Industrial Property Rights) (2 results)

  • [Int'l Joint Research] Istituto Officina dei Materiali (IOM)(イタリア)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Ultra-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources2021

    • Author(s)
      Sugime Hisashi、Sato Toshihiro、Nakagawa Rei、Hayashi Tatsuhiro、Inoue Yoku、Noda Suguru
    • Journal Title

      Carbon

      Volume: 172 Pages: 772-780

    • DOI

      10.1016/j.carbon.2020.10.066

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gd-Enhanced Growth of Multi-Millimeter-Tall Forests of Single-Wall Carbon Nanotubes2019

    • Author(s)
      Sugime Hisashi、Sato Toshihiro、Nakagawa Rei、Cepek Cinzia、Noda Suguru
    • Journal Title

      ACS Nano

      Volume: 13 Issue: 11 Pages: 13208-13216

    • DOI

      10.1021/acsnano.9b06181

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 14-cm-long carbon nanotube forest via in situ supplements of iron and aluminum vapor sources2021

    • Author(s)
      杉目 恒志, 仲川 黎, 佐藤 俊裕, 林 竜弘, 井上 翼, 野田 優
    • Organizer
      フラーレン・ナノチューブ・グラフェン学会
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] FeとAl源の気相供給による14cm長カーボンナノチューブフォレストの成長2021

    • Author(s)
      杉目 恒志, 仲川 黎, 佐藤 俊裕, 林 竜弘, 井上 翼, 野田 優
    • Organizer
      応用物理学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] FeとAl源の気相供給による14cm長カーボンナノチューブフォレストの成長2021

    • Author(s)
      杉目 恒志, 仲川 黎, 佐藤 俊裕, 林 竜弘, 井上 翼, 野田 優
    • Organizer
      化学工学会 第86年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Growth mechanism of multi-millimeter-tall single-wall carbon nanotube forests using Fe/Gd/Al catalysts2019

    • Author(s)
      Hisashi Sugime, Rei Nakagawa, Toshihiro Sato, Cinzia Cepek, and Suguru Noda
    • Organizer
      Guadalupe Workshop IX: Workshop on Nucleation and Growth Mechanisms of Single Wall Carbon Nanotubes, Fredericksburg
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Growth mechanism of multi-millimeter-tall single-wall carbon nanotube forests using Fe/Gd/Al catalysts2019

    • Author(s)
      Hisashi Sugime, Rei Nakagawa, Toshihiro Sato, Cinzia Cepek, and Suguru Noda
    • Organizer
      NT19: International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Growth mechanism of multi-millimeter-tall single-wall carbon nanotube forests using Fe/Gd/Al catalysts2019

    • Author(s)
      Hisashi Sugime, Rei Nakagawa, Toshihiro Sato, Cinzia Cepek, and Suguru Noda
    • Organizer
      18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Growth mechanism of multi-millimeter-tall single-wall carbon nanotube forests using Fe/Gd/Al catalysts2019

    • Author(s)
      Hisashi Sugime, Rei Nakagawa, Toshihiro Sato, Cinzia Cepek, and Suguru Noda
    • Organizer
      第56回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fe/Gd/Al触媒を用いた数ミリメートル長単層カーボンナノチューブフォレストの合成2019

    • Author(s)
      杉目 恒志,仲川 黎,佐藤 俊裕,野田 優
    • Organizer
      化学工学会第84年会
    • Related Report
      2019 Research-status Report
  • [Remarks] カーボンナノチューブの長尺化に成功

    • URL

      https://www.waseda.jp/top/news/70601

    • Related Report
      2020 Annual Research Report
  • [Remarks] Scientists Grow Carbon Nanotube Forest Much Longer

    • URL

      https://www.waseda.jp/top/en/news/73953

    • Related Report
      2020 Annual Research Report
  • [Remarks] 単層カーボンナノチューブの長尺化へ

    • URL

      https://www.waseda.jp/top/news/67173

    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] カーボンナノチューブ、その製造方法および製造装置2020

    • Inventor(s)
      杉目恒志,佐藤俊裕,仲川黎,野田優
    • Industrial Property Rights Holder
      杉目恒志,佐藤俊裕,仲川黎,野田優
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-138466
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] カーボンナノチューブ、その製造方法および製造装置2019

    • Inventor(s)
      杉目恒志、佐藤俊裕、仲川黎、野田優
    • Industrial Property Rights Holder
      杉目恒志、佐藤俊裕、仲川黎、野田優
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-138466
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2022-01-27  

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