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Study on Ice crystal growth mechanism through observation of hydration layers in quasi-liquid layer by high-speed FM-AFM

Research Project

Project/Area Number 21K20506
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
Research InstitutionRyukoku University

Principal Investigator

Miyato Yuji  龍谷大学, 先端理工学部, 准教授 (80512780)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords原子間力顕微鏡 / 高速AFM / 雪氷結晶 / 高速化 / 成長機構
Outline of Research at the Start

本研究では、雪氷結晶の成長過程を実験的に解明することを目的とし、成長環境を制御可能で高速な周波数検出型原子間力顕微鏡(FM-AFM)を開発する。さらに、開発した装置を用いて、氷点下であっても氷の上において液体として存在する水の層(擬似液体層)を観察することを目指す。成長する際の周囲環境による雪氷結晶表面の形態変化、および擬似液体層の状態変化を観測することで、成長モードの温度依存性を解明することに挑戦する。

Outline of Final Research Achievements

We have newly developed the high-speed atomic force microscope (HS-AFM), which realizes probe-scan using a quartz crystal resonator sensor as a force sensor. The equipment design employs mechanics performing the less mechanical drift when the temperature changes. The controllable band width of the new high-speed scanner is approximately 20 kHz, which achieves a required level for HS-AFM. We have also confirmed the assembled AFM controller can perform frequency-modulation AFM (FM-AFM). Unfortunately, our new HS-AFM system still requires fine-tuning for best performances. Then, we analyzed the ice-crystal measurement results taken by previous prototype HS-AFM system. We found that the quasi-liquid layer (QLL) existed on ice-crystals, and that the QLL played a key role of surface condition of ice-crystals. This results indicated that the QLL could affect ice-growth processes.
We will continuously measure the QLL by using our newly developed HS-AFM system.

Academic Significance and Societal Importance of the Research Achievements

高速AFMで雪氷結晶を観察できる装置はこれまで報告されておらず、水晶振動子センサを用いたプローブスキャン方式の高速AFMも研究実績は多くはない。上記装置を研究活動スタート支援のお蔭によって整備できたことは、雪氷結晶の観察にとどまらず、湿度や温度をコントロールして測定できる点で応用範囲が広いと考えている。特に、試料が水などで部分濡れしていても水晶振動子センサの適用により安定撮像できるという技術的な意義もある。今後、安定動作を達成し、様々な条件で雪氷結晶を測定できるようになり、擬似液体層の粘性と成長速度の相関を明らかにできれば、永らく謎であった雪氷結晶の成長機構の解明に寄与することが期待できる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Invited: 1 results)

  • [Journal Article] Fabrication and Evaluation of YBa2Cu3O7-δ Probe for Scanning Probe Microscopy2023

    • Author(s)
      S. Ariyoshi, A. Ebata, B. Ohnishi, S. Ohnishi, T. Kanada, K. Hayashi, Y. Miyato, S. Tanaka, and N. Hiroshiba
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2023.3235955

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 融点近傍における気相成長氷のFM-AFM観察2023

    • Author(s)
      宮戸 祐治, 大谷 勝樹, 山下 隼人, 阿部 真之
    • Organizer
      日本顕微鏡学会 走査プローブ顕微鏡分科会 バイオSPM研究会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] High-temperature Superconducting Probe for Scanning Probe Microscopy2023

    • Author(s)
      S. Ariyoshi, A. Ebata, B. Ohnishi, S. Ohnishi, T. Kanada, K. Hayashi, Y. Miyato, S. Tanaka, and N. Hiroshiba
    • Organizer
      The 11th East Asia Symposium on Superconductor Electronics
    • Related Report
      2022 Annual Research Report
  • [Presentation] Detection of vacuum level using KFM measurement under temperature gradient for accelerating thermoelectric material study2022

    • Author(s)
      Yuki Komatsubara, Yuji Miyato, Takafumi Ishibe, Yoshiaki Nakamura
    • Organizer
      The 22nd International Vacuum Congress (IVC-22)
    • Related Report
      2022 Annual Research Report
  • [Presentation] AFMによる融点近傍の氷表面観察2022

    • Author(s)
      宮戸祐治
    • Organizer
      学術振興会167第102回研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Humidity-Controlled Atomic Force Microscopy Introducing High Speed Scanner2021

    • Author(s)
      K. Kyomoto, Y. Miyato, H. Yamashita, M. Abe
    • Organizer
      29th International Colloquium on Scanning Probe Microscopy (ICSPM29)
    • Related Report
      2021 Research-status Report

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Published: 2021-10-22   Modified: 2024-01-30  

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