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2022 Fiscal Year Annual Research Report

Platform for atomic-order thermal probing and elucidation of wave-like heat conduction

Research Project

Project/Area Number 20H02090
Research InstitutionKyushu University

Principal Investigator

李 秦宜  九州大学, 工学研究院, 准教授 (60792041)

Co-Investigator(Kenkyū-buntansha) 高橋 厚史  九州大学, 工学研究院, 教授 (10243924)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywords熱物性 / グラフェン
Outline of Annual Research Achievements

In FY2022, we achieved both ultrahigh spatial-resolution thermal measurements and high-precision fabrication of nanostructures for the study of wave-like heat conduction. First, we combined the electron beam (EB) heating with two suspended line-shaped heat flux sensors and achieved the in-situ thermal resistance mapping along a single carbon nanotube (CNT) in a scanning electron microscope with a nanometer-range spatial resolution. The CNT is anchored between the two suspended metal lines, and the focused electron beam heats the CNT locally with an ultrahigh spatial resolution, while the two metal lines simultaneously measure the heat fluxes induced by the EB heating. We can obtain the spatially resolved thermal resistance by sweeping the focused EB along the CNT. This achievement has been published in International Journal of Heat and Mass Transfer and paved the way for the experimental elucidation of various localized heat conduction phenomena, including the wave effect. Second, we developed a method to fabricate ultrafine nanopores of ~5nm diameter on monolayer graphene with the high-energy electron beam in the transmission electron microscope (TEM). We also realized in-situ annealing of nanoporous silicon thin films in TEM, and fabricated silicon nanostructures with ultrafine edges for the elucidation of wave-like heat conduction.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

  • Research Products

    (7 results)

All 2022 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Int'l Joint Research] University of Arizona(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Arizona
  • [Journal Article] Thermal resistance mapping along a single cup-stacked carbon nanotube with focused electron beam heating2022

    • Author(s)
      Li Dawei、Li Qin-Yi、Takahashi Koji
    • Journal Title

      International Journal of Heat and Mass Transfer

      Volume: 198 Pages: 123418~123418

    • DOI

      10.1016/j.ijheatmasstransfer.2022.123418

    • Peer Reviewed
  • [Journal Article] Slip Flow on Graphene: Current Status and Perspective2022

    • Author(s)
      Chen Kuan-Ting、Li Qin-Yi、Takahashi Koji
    • Journal Title

      Journal of Thermal Science

      Volume: 31 Pages: 1115~1134

    • DOI

      10.1007/s11630-022-1668-8

    • Peer Reviewed
  • [Journal Article] Round Robin Study on the Thermal Conductivity/Diffusivity of a Gold Wire with a Diameter of 30 μm Tested via Five Measurement Methods2022

    • Author(s)
      Abe Ryo、Sekimoto Yuki、Saini Shirkant、Miyazaki Koji、Li Qinyi、Li Dawei、Takahashi Koji、Yagi Takashi、Nakamura Masakazu
    • Journal Title

      Journal of Thermal Science

      Volume: 31 Pages: 1037~1051

    • DOI

      10.1007/s11630-022-1594-9

    • Peer Reviewed
  • [Presentation] In-situ thermal measurement with electron microscopy2022

    • Author(s)
      Li Qin-Yi
    • Organizer
      The 13th Asian Thermophysical Properties Conference (ATPC 2022)
    • Int'l Joint Research / Invited
  • [Presentation] Nanoscale Thermal and Fluid Characterization with Electron Microscopy2022

    • Author(s)
      Li Qin-Yi
    • Organizer
      2022 International Forum on High-end Equipment and Intelligent Manufacturing
    • Int'l Joint Research / Invited
  • [Presentation] How to measure the thermal contact resistance at the nanoscale2022

    • Author(s)
      李 秦宜, 高橋 厚史
    • Organizer
      第 59 回日本伝熱シンポジウムプログラム

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Published: 2023-12-25  

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