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Understanding and control of electron and phonon transport in hierarchical structure of carbon nanotubes

Research Project

Project/Area Number 21H01259
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionKyushu Institute of Technology (2023)
The University of Tokyo (2021-2022)

Principal Investigator

Kodama Takashi  九州工業大学, 大学院工学研究院, 教授 (10548522)

Co-Investigator(Kenkyū-buntansha) 志賀 拓麿  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (10730088)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Keywords熱エネルギー工学 / マイクロ/ナノ加工 / カーボンナノチューブ / マルチスケール熱伝導測定 / ナノスケール伝熱 / 熱工学 / 熱電変換 / 分子内包 / 高熱伝導材料 / 高電気伝導線材 / 分子内包効果 / 線材化技術 / マイクロ・ナノ加工 / 熱電変換材料 / ナノ/マイクロ加工
Outline of Research at the Start

カーボンナノチューブ(Carbon nanotube, CNT)は優れた電気・熱伝導性を有する代表的なナノ材料であり、様々な分野で工学応用が期待されている。CNTはバルク構造化によって電気・熱伝導率がそれぞれ大きく低下してしまうことが現在の課題となっているが、その性能劣化は主にナノレベルにおけるCNTの伝導性の変化によって生じていることが、近年の研究で新たに明らかになっている。本研究では、これまでに申請者が開発した単一ナノ構造体やバルク体の伝導測定技術を利用して、様々な材料形態のCNTに対して伝導率の"階層的評価"を行い、複合材料化によるCNTの伝導機構の解明と戦略的な伝導性制御に挑戦する。

Outline of Final Research Achievements

To clarify the mechanism of the variation in the thermal conductivity of carbon nanotubes (CNTs) when it forms different types of material structure from nano to bulk scale, we evaluate the dependence of thermal conductivity of CNTs microfibers with variation of the degree of orientation and bulk density fabricated by liquid crystal spun method. The measurement results indicate that the thermal conductivity of the microfibers shows a strong correlation with the orientation degree, material density, and the electrical conductivity, and that the bulk thermal conductivity shows a value close to the saturated thermal conductivity of the raw CNT bundle obtained by nanoscale thermal conductivity measurement. Further, regarding the reduction of the thermal conductivity due to bundling, molecular simulation of the thermal conductivity of CNT bundles with different chiralities succeed in qualitatively finding that the chirality mismatch affects the suppression of the thermal conductivity.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られたバルクCNT材料の熱伝導性に関する知見は、フレキシブル高熱伝導材料など次世代熱拡散材の性能を向上させるための貴重な設計指針であり、さらには電気伝導率とも強い相関関係が生じていることから、次世代電線といった熱工学を超越した幅広い工学応用に繋がる極めて社会的インパクトの強い研究成果であると考えられる。また、本研究で実証したCNT線材内への直接分子内包による熱電物性の変調現象は、今後、製作されたCNTバルク構造体の性能向上にも結び付く貴重な研究成果であるといえる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (16 results)

All 2024 2023 2022 2021

All Journal Article (9 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 9 results,  Open Access: 5 results) Presentation (7 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Effect of bundling on phonon transport in single-walled carbon nanotubes2024

    • Author(s)
      Shiga Takuma、Terada Yukihiko、Chiashi Shohei、Kodama Takashi
    • Journal Title

      Carbon

      Volume: 223 Pages: 119048-119048

    • DOI

      10.1016/j.carbon.2024.119048

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhanced High Thermal Conductivity Cellulose Filaments via Hydrodynamic Focusing2022

    • Author(s)
      Wang Guantong、Kudo Masaki、Daicho Kazuho、Harish Sivasankaran、Xu Bin、Shao Cheng、Lee Yaerim、Liao Yuxuan、Matsushima Naoto、Kodama Takashi、Lundell Fredrik、S?derberg L. Daniel、Saito Tsuguyuki、Shiomi Junichiro
    • Journal Title

      Nano Letters

      Volume: 22 Issue: 21 Pages: 8406-8412

    • DOI

      10.1021/acs.nanolett.2c02057

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Suppressed phonon conduction by geometrically induced evolution of transport characteristics from Brownian motion into L?vy flight2022

    • Author(s)
      Kim Yongjoon、Kodama Takashi、Kim Yoonjin、Kim Brian S. Y.、Ko Changhyun、Lim Jongwoo、Park Woosung
    • Journal Title

      NPG Asia Materials

      Volume: 14 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s41427-022-00375-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ultra-high-performance heat spreader based on a graphite architecture with three-dimensional thermal routing2021

    • Author(s)
      Xu Bin、Liao Yuxuan、Fang Zhenglong、Nagato Keisuke、Kodama Takashi、Nishikawa Yasushi、Shiomi Junichiro
    • Journal Title

      Cell Reports Physical Science

      Volume: 2 Issue: 11 Pages: 100621-100621

    • DOI

      10.1016/j.xcrp.2021.100621

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduction of interface thermal resistance between TIM and metal surface by tuning wettability2021

    • Author(s)
      IRA Yusuke、KODAMA Takashi、SHIOMI Junichiro
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 87 Issue: 898 Pages: 21-00023-21-00023

    • DOI

      10.1299/transjsme.21-00023

    • NAID

      130008057126

    • ISSN
      2187-9761
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tailoring the surface morphology of carbon nanotube forests by plasma etching: A parametric study2021

    • Author(s)
      Seo Seungju、Kim Sanha、Yamamoto Shun、Cui Kehang、Kodama Takashi、Shiomi Junichiro、Inoue Taiki、Chiashi Shohei、Maruyama Shigeo、Hart A. John
    • Journal Title

      Carbon

      Volume: 180 Pages: 204-214

    • DOI

      10.1016/j.carbon.2021.04.066

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Thermal expansion characterization of thin films using harmonic Joule heating combined with atomic force microscopy2021

    • Author(s)
      Chaikasetsin Settasit、Kodama Takashi、Bae Kiho、Jung Jun Young、Shin Jeeyoung、Lee Byung Chul、Kim Brian S. Y.、Seo Jungju、Sim Uk、Prinz Fritz B.、Goodson Kenneth E.、Park Woosung
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 19 Pages: 194101-194101

    • DOI

      10.1063/5.0049160

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modulation of Interfacial Thermal Transport between Fumed Silica Nanoparticles by Surface Chemical Functionalization for Advanced Thermal Insulation2021

    • Author(s)
      Kodama Takashi、Shinohara Nobuhiro、Hung Shih-Wei、Xu Bin、Obori Masanao、Suh Donguk、Shiomi Junichiro
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 13 Issue: 15 Pages: 17404-17411

    • DOI

      10.1021/acsami.0c11066

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Weaker bonding can give larger thermal conductance at highly mismatched interfaces2021

    • Author(s)
      Xu Bin、Hu Shiqian、Hung Shih-Wei、Shao Cheng、Chandra Harsh、Chen Fu-Rong、Kodama Takashi、Shiomi Junichiro
    • Journal Title

      Science Advances

      Volume: 7 Issue: 17 Pages: 1-7

    • DOI

      10.1126/sciadv.abf8197

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ナノ構造材料を用いた新規熱機能性材料の開拓2023

    • Author(s)
      児玉高志
    • Organizer
      九州伝熱セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Multi-scale thermal conduction measurement for the development of new thermal functional materials2023

    • Author(s)
      Takashi Kodama
    • Organizer
      11th International Symposium on Applied Engineering and Sciences (SAES2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CNT線材の電気抵抗率低減に向けた導電機構の検証2023

    • Author(s)
      杉原和樹, 小泉正治, 山崎悟志, 児玉高志, 千足昇平
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 階層的熱伝導評価によるカーボンナノチューブ線材の熱輸送機構の解明2022

    • Author(s)
      佐藤彰斗,足立健人,児玉高志
    • Organizer
      第59回日本伝熱シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] カーボンナノチューブ線材の階層的電気・熱伝導測定2021

    • Author(s)
      佐藤彰斗,足立健人,児玉高志
    • Organizer
      熱工学コンファレンス2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] カイラリティが異なる長尺な二層カーボンナノチューブのスペクトル熱輸送解析2021

    • Author(s)
      寺田行彦,児玉高志,千足昇平,志賀拓麿
    • Organizer
      熱工学コンファレンス2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 四端子熱計測を用いたバルクカーボンナノチューブ材料の熱伝導計測2021

    • Author(s)
      佐藤彰斗,足立健人,児玉高志
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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