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Heat Transfer Measurement on Nanogap -Investigation of Transition from Radiation to Heat Conduction

Research Project

Project/Area Number 21H01261
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 InstitutionKyoto University

Principal Investigator

Tsuchiya Toshiyuki  京都大学, 工学研究科, 教授 (60378792)

Co-Investigator(Kenkyū-buntansha) 三宅 修吾  神戸市立工業高等専門学校, その他部局等, 教授 (60743953)
廣谷 潤  京都大学, 工学研究科, 准教授 (80775924)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Keywordsナノギャップ / 熱放射 / カシミール力 / MEMS / 単結晶シリコン / 顕微ラマン分光 / サーモリフレクタンス法 / へき開 / シリコン / サーモリフレクタンス / 熱輸送 / 伝熱
Outline of Research at the Start

本研究ではMEMSデバイスを用い、ナノスケールの空間において伝熱が放射から熱伝導に遷移する領域を実験的に測定します。単結晶シリコンの(111)面を真空中でへき開破壊することで、数μm角の平行平滑なナノギャップを創製し、これを数nm以下の分解能で間隔を制御しようというものです。その伝熱測定には精密な局所温度測定が必要であり、顕微ラマン分光、サーモリフレクタンス、機械振動特性変化の3手法を検討し、0.1K以下の分解能を実現します。これらにより固体接触面における伝熱現象という基本的でありながらいまだに明らかでない現象を解明し、様々な機械・構造における熱エネルギーの効率的な利用に応用します。

Outline of Final Research Achievements

In this study, a MEMS device was developed to experimentally measure the transition region from radiation heat transfer to heat conduction using nanogap. The device was fabricated on a device layer (5 micrometer thick) of a SOI wafer with a surface orientation of (110), and a few micrometer square parallel smooth nanogap composed of single crystal silicon (111) planes was created by applying a load using an external actuator. By controlling the gap spacing with a resolution of less than a few nm using electrostatic actuators and displacement sensors, we have successfully observed pull-in due to Casimir forces and measured the temperature difference between the gaps with a temperature resolution of up to 0.1 K using micro-Raman spectroscopy and thermo-reflectance techniques.

Academic Significance and Societal Importance of the Research Achievements

本研究で実現した数μm角の面積を有するギャップにおいて間隔10nm以下で発生するカシミール力によるプルインを観察できるほどに平滑なナノギャップを作製した例はなく、学術的意義は高い。熱輸送や電界電子放出などのナノ空間における物理現象の計測に応用することが期待され、今後の展開が期待される。
また、これらの技術を用いて、創製したナノギャップの伝熱測定に顕微ラマン分光、サーモリフレクタンスによる精密な局所温度測定を行い、固体接触面における伝熱現象という基本的でありながらいまだに明らかでない現象の解明が期待され、さらには様々な機械・構造における熱エネルギーの効率的な利用への応用展開も望まれる。

Report

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

    (15 results)

All 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Numerical calculation of thermoreflectance coefficient of c-Si for wavelengths of 200?800 nm and temperatures of 300?500 K2023

    • Author(s)
      Shimofuri Masaki、Murakami Taichi、Miyake Shugo、Banerjee Amit、Hirotani Jun、Tsuchiya Toshiyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: 11 Pages: 112006-112006

    • DOI

      10.35848/1347-4065/ad07f8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nanometer Order Separation Control of Large Working Area Nanogap Created by Cleavage of Single-Crystal Silicon Along {111} Planes Using a MEMS Device2023

    • Author(s)
      Shimofuri Masaki、Banerjee Amit、Hirotani Jun、Hirai Yoshikazu、Tsuchiya Toshiyuki
    • Journal Title

      Journal of Microelectromechanical Systems

      Volume: 32 Issue: 1 Pages: 67-73

    • DOI

      10.1109/jmems.2022.3213999

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gap distance dependence on field emission at the nanogap between silicon cleavage surfaces2023

    • Author(s)
      Akura Yuki、Shimofuri Masaki、Banerjee Amit、Hirotani Jun、Tsuchiya Toshiyuki
    • Journal Title

      Journal of Vacuum Science & Technology B

      Volume: 41 Issue: 2 Pages: 022805-022805

    • DOI

      10.1116/6.0002456

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 反射率温度依存性を用いたレーザー光反射強度計測による表面温度の非接触測定2023

    • Author(s)
      村上 大志, 土屋 智由, 霜降 真希, 三宅 修吾
    • Organizer
      第14回「マイクロ・ナノ工学シンポジウム」
    • Related Report
      2023 Annual Research Report
  • [Presentation] Characterization of gap-distance dependency on field emission at nanogap between silicon cleavage surfaces by numerical calculations2022

    • Author(s)
      Yuki Akura, Masaki Shimofuri, Amit Banerjee, Jun Hirotani, Toshiyuki Tsuchiya
    • Organizer
      2022 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment (MIPE 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 真空ナノギャップを用いた熱電子発電実現に向けて2022

    • Author(s)
      土屋智由
    • Organizer
      伝熱学会 関西支部 第17回関西伝熱セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 半導体へき開面ナノギャップにおける電界電子放出特性のギャップ間隔依存性の数値計算による評価2022

    • Author(s)
      安倉 祐樹、霜降 真希、Banerjee Amit、廣谷 潤、土屋 智由
    • Organizer
      日本機械学会 2022年度 年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] パルス電圧印加を用いた間隔可変単結晶シリコンナノギャップの電子輸送特性計測2022

    • Author(s)
      霜降 真希, 廣谷 潤, Banerjee Amit, 土屋 智由
    • Organizer
      第13回「マイクロ・ナノ工学シンポジウム」
    • Related Report
      2022 Annual Research Report
  • [Presentation] Observation of Pull-In by Casimir Force in MEMS-Controlled Nanogap Fabricated by Silicon Cleavage2022

    • Author(s)
      Masaki Shimofuri, Yoshikazu Hirai, Amit Banerjee, and Toshiyuki Tsuchiya
    • Organizer
      The 35th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2022)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SOI-MEMS device for fabrication and physical properties measurement of single-crystal silicon nanogap with (111) cleavage plane surfaces2021

    • Author(s)
      Masaki Shimofuri, Yoshikazu Hirai, Amit Banerjee, Toshiyuki Tsuchiya
    • Organizer
      34th International Microprocesses and Nanotechnology Conference (MNC 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of microscale thermal characteristics of coldrolled aluminum alloy by thermoreflectance method2021

    • Author(s)
      Souto Yamashita, Shugo Miyake
    • Organizer
      The 34th International Microprocesses and Nanotechnology Conference(Online)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of thermal effusivity of intermetallic compounds by modulated thermoreflectance method2021

    • Author(s)
      Fumiya Nakamura, Taishi Murakami, Shugo Miyake
    • Organizer
      The 34th International Microprocesses and Nanotechnology Conference(Online)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単結晶シリコンへき開面ナノギャップ間の熱電界電子トンネリング計測2021

    • Author(s)
      霜降 真希, 吉村 光葵, 文 和彦, 平井 義和, Banerjee Amit, 土屋 智由
    • Organizer
      日本機械学会 2021年度 年次大会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 単結晶へき開面ナノギャップの物性

    • URL

      https://www.nms.me.kyoto-u.ac.jp/propsiliconnanogap/

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
  • [Remarks] ナノギャップを用いた熱電子発電

    • URL

      https://www.nms.me.kyoto-u.ac.jp/nanogapsi/

    • Related Report
      2021 Annual Research Report

URL: 

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

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