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Single crystal nanowhiskers by stress-induced atomic diffusion using multi-layer metal nanostructures

Research Project

Project/Area Number 20K20959
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
Research InstitutionNagoya University

Principal Investigator

TOKU Yuhki  名古屋大学, 工学研究科, 講師 (60750180)

Co-Investigator(Kenkyū-buntansha) 木村 康裕  名古屋大学, 工学研究科, 助教 (70803740)
Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsナノワイヤ / 薄膜 / ナノ材料 / 金属ナノ材料 / ナノチューブ / 応力誘導 / 固相還元 / 原子拡散 / 触媒
Outline of Research at the Start

本研究では,独自のコアシェル型ナノチューブの作製手法を利用し,極小の単結晶銅ナノウィスカーを創製する.極小ナノウィスカーは粒子状と異なり,高アスペクト比かつ大きな結晶露出面積を持つ新たなCO2分解触媒として期待できる.ウィスカーの創製原理は,外皮金属により密閉した空間に加熱還元された金属が析出する際,線膨張係数の差により還元金属中に圧縮応力が生ずる.このとき還元金属の原子拡散が誘起され,外皮の格子欠陥・結晶粒界を拡散した還元金属原子がウィスカー状に析出する.応力による原子拡散により創製したナノウィスカーはほぼ単結晶であり,副反応の少ないCO2の分解触媒へと応用できる.

Outline of Final Research Achievements

In this study, we attempted to create a single crystal nanowhisker to overcome the current situation where the copper catalyst used for CO2 decomposition is limited to particles. We have succeeded in the mass production of multi-walled metal hollow nanostructures, which is the basis for creating nanowhiskers, by using our original method for producing core-shell type nanotubes. Furthermore, to realize large area and mass production, we have realized the production of a single crystal copper nanowhisker using a template and electrodeposition technique. Nanowhiskers can be expected as a new CO2 decomposition catalyst with a high aspect ratio and a large single crystal exposed area. It can be applied to CO2 decomposition catalysts that suppress side reactions.

Academic Significance and Societal Importance of the Research Achievements

環境・エネルギー問題の解決のため,二酸化炭素(CO2)の分解・利用は極めて重要である.分解には銅のナノ粒子が知られているが,分解時のエネルギー収支が悪く,実用化には至っていない.エネルギー収支の改善には,触媒作用に有効な結晶面を特定し,露出面積を増やすといった対策が有効と考えられる.そこで本研究では独自のコアシェル型ナノチューブ作製法およびテンプレート法の利用により,大量の単結晶ナノウィスカー群の作製を実施した.本成果により特定の結晶面を多く有するナノ触媒を大量生産でき,副反応の小さいCO2分解触媒として期待ができることから,世界のグリーンエネルギー研究に貢献が期待できる.

Report

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

    (15 results)

All 2022 2021

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

  • [Journal Article] Improvement of low-cycle fatigue life of austenitic stainless steel by multiple high-density pulsed electric currents2022

    • Author(s)
      Yoon Sungmin、Cui Yi、Kimura Yasuhiro、Gu Shaojie、Toku Yuhki、Ju Yang
    • Journal Title

      International Journal of Fatigue

      Volume: 156 Pages: 106639-106639

    • DOI

      10.1016/j.ijfatigue.2021.106639

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rapid anisotropy recovery in deformed FCC metals by high-density pulsed electric current treatment2022

    • Author(s)
      Gu Shaojie、Cui Yi、Yoon Sungmin、Wang Zizheng、Kimura Yasuhiro、Toku Yuhki、Ju Yang
    • Journal Title

      Vacuum

      Volume: 197 Pages: 110855-110855

    • DOI

      10.1016/j.vacuum.2021.110855

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of Electric Current-Induced Improvement of Fracture Characteristics in SUS3162021

    • Author(s)
      Yoon Sungmin、Kimura Yasuhiro、Cui Yi、Toku Yuhki、Ju Yang
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 62 Issue: 6 Pages: 748-755

    • DOI

      10.2320/matertrans.MT-M2020333

    • NAID

      130008042828

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2021-06-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative evaluation of local permittivity of semiconductor nanomaterials using microwave atomic force microscopy2021

    • Author(s)
      Zhao Minji、Tong Bo、Kimura Yasuhiro、Toku Yuhki、Morita Yasuyuki、Ju Yang
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 19 Pages: 193103-193103

    • DOI

      10.1063/5.0049619

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Assessment of creep behavior using a damage-coupled model for martensitic stainless steel2021

    • Author(s)
      YOON Sungmin、KIMURA Yasuhiro、TOKU Yuhki、JU Yang、PARK Soojeong、KIM Yunhae
    • Journal Title

      Mechanical Engineering Journal

      Volume: 8 Issue: 5 Pages: 21-00178-21-00178

    • DOI

      10.1299/mej.21-00178

    • NAID

      130008104596

    • ISSN
      2187-9745
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nanotwinning and tensile behavior in cold-welded high-entropy-alloy nanowires2021

    • Author(s)
      Cui Yi、Toku Yuhki、Ju Yang
    • Journal Title

      Nanotechnology

      Volume: 32 Issue: 31 Pages: 315716-315716

    • DOI

      10.1088/1361-6528/abf7eb

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 薄膜の結晶方位および下地材料が応力誘導ナノワイヤ成長に及ぼす影響2021

    • Author(s)
      山田秀幸,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] コアシェル型DDS キャリアの薬剤担持量向上に関する研究2021

    • Author(s)
      角田浩基,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高密度パルス電流による純チタン結晶組織への影響2021

    • Author(s)
      丸本裕貴,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高周波電流による薄膜密着強度の向上に関する研究2021

    • Author(s)
      彭彦鴻,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高周波電流を利用した金属薄膜内原子配列の高秩序化に関する研究2021

    • Author(s)
      安田和弘,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] 銅ナノワイヤ面ファスナー接合強度の向上2021

    • Author(s)
      杉浦圭,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高密度パルス電流による予ひずみを有するインコネル 718 の加工硬化の緩和2021

    • Author(s)
      Shaojie Gu,巨陽,徳悠葵,木村康裕
    • Organizer
      日本機械学会M&M2021,材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fatigue damage recovery of austenitic stainless steel by high-density pulsed electric current2021

    • Author(s)
      Sungmin YOON,巨陽,徳悠葵,木村康裕
    • Organizer
      日本金属学会,2021年秋期(第169回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] On Selective Fabrication of Metallic Micro/Nanomaterials in Electromigration-Based Injection System2021

    • Author(s)
      Yuta Ito, Yasuhiro Kimura, Yuhki Toku, Yang Ju
    • Organizer
      ICNB2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2020-08-03   Modified: 2023-01-30  

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