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Multi-scale simulation for gas/liquid/solid hetero interfaces from first principles method

Research Project

Project/Area Number 19K22044
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionKyushu University

Principal Investigator

Tada Tomofumi  九州大学, エネルギー研究教育機構, 教授 (40376512)

Co-Investigator(Kenkyū-buntansha) 洗平 昌晃  名古屋大学, 未来材料・システム研究所, 助教 (20537427)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
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第一原理計算 / ヘテロ界面 / 機械学習ポテンシャル / マルチカノニカル / モンテカルロ / 動的モンテカルロ / 網羅的素過程探索 / 非平衡シミュレーション / ニューラルネットワーク / 動的モンテカルロ法 / マルチカノニカル法 / 気液固複合相 / 気液固複合相ヘテロ界面 / 非平衡 / モンテカルロ法
Outline of Research at the Start

デバイス性能を議論する際、バルク材料と他相とのヘテロ接合界面の微視的情報の把握が重要であるが、これは大変困難な課題である。それは、原子、分子、イオンが各相に流れ込むことによる不定比組成状態の出現と、反応・拡散速度の違いによる非平衡性のため、ヘテロ界面の実態を微視的に決定することが極めて困難なためである。よって、本研究は第一原理計算を利用した網羅的素過程探索と、気液固複合相の非平衡状態を記述できる長時間ダイナミクス手法とを融合することで気液固複合相ヘテロ界面の実在系非平衡シミュレーションを達成し、新しい計算技術の潮流を生み出すことを目的としたものである。

Outline of Final Research Achievements

The aim of this study is constructing a theoretical framework for large-scale simulation of interfaces composed of gas, liquid, and solid phases, which are required for theoretical designing of functional devices based on a microscopic model described in the atomistic scales. By combining the following three methods: (i) machine learning potential method using first-principles calculation as training data for highly accurate structural representation, (ii) multicanonical sampling method for evaluation of kinetic information of chemical reactions, and (iii) kinetic Monte Carlo method for large-scale simulation, we successfully achieved the purpose of this study.

Academic Significance and Societal Importance of the Research Achievements

現在、我々の世界は様々な社会的課題に直面しており、中でも早急に解決が必要とされている課題としてカーボンニュートラルがあります。これを達成するには、グリーンな物質変換・物質輸送が必要であり、電池、触媒等の機能性デバイスの更なる性能向上が必要とされております。本研究の成果である、複雑な界面とそこでの化学反応を正確に記述し大規模スケールに原子分子の微視的モデルを用いたまま展開する理論的枠組みは、機能性デバイスの設計指針をより正確に与えることのできる設計ツールの基盤となります。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Journal Article] Characteristic mechanism for fast H- conduction in LaH2.5O0.252022

    • Author(s)
      Albert Iskandarov, Tomofumi Tada, Soshi Iimura, Hideo Hosono
    • Journal Title

      Acta Materialia

      Volume: 230 Pages: 117825-117825

    • DOI

      10.1016/j.actamat.2022.117825

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Room-temperature fast H- conduction in oxygen-substituted lanthanum hydride2022

    • Author(s)
      Keiga Fukui, Soshi Iimura, Albert Iskandarov, Tomofumi Tada, and Hideo Hosono
    • Journal Title

      Journal of the American Chemical Society

      Volume: 144 Issue: 4 Pages: 1523-1527

    • DOI

      10.1021/jacs.1c11353

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accurate meso-scale dynamics by kinetic Monte Carlo simulation via free energy multicanonical sampling: oxygen vacancy diffusion in BaTiO32021

    • Author(s)
      Hiroya Nakata, Masaaki Araidai, Shandan Bai, Hiromichi Hirano, and Tomofumi Tada
    • Journal Title

      Science and Technology of Advanced Materials: Methods

      Volume: 1 Issue: 1 Pages: 109-122

    • DOI

      10.1080/27660400.2021.1930915

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Large scale atomistic simulations driven by neural-network potential molecular dynamics and kinetic Monte Carlo with external fields2021

    • Author(s)
      Tomofumi Tada
    • Organizer
      Materials Research Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Accurate mesoscale simulation for oxygen vacancy diffusion in BaTiO3 by kinetic Monte Carlo method via free energy multicanonical sampling2021

    • Author(s)
      Tomofumi Tada and Masaaki Araidai
    • Organizer
      Materials Research Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multicanonical simulations with physically informed neural network potentials on chemical reactions in gas phase2021

    • Author(s)
      Masaaki Araidai
    • Organizer
      The 8th Asian Conference on Crystal Growth and Crystal Technology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recent developments in atomistic simulations for new compound search with energetics and multi-scale dynamics with kinetics2019

    • Author(s)
      Tomofumi Tada
    • Organizer
      The 1st International Symposium on Computational Structure Prediction and Advanced Materials
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2019-07-04   Modified: 2023-01-30  

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