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High-temperature piezoelectric devices based on piezoelectric free-standing nanorod arrays

Research Project

Project/Area Number 20H02632
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 30010:Crystal engineering-related
Research InstitutionShinshu University

Principal Investigator

Watanabe Kentaro  信州大学, 学術研究院繊維学系, 准教授 (40582078)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Keywords単結晶自立ナノロッド / ZnO / 溶液成長 / 選択成長 / 圧電変換
Outline of Research at the Start

本研究では、高温下で圧電性が消失しない極性結晶ZnOに注目し、耐熱性フレキシブル基板を金属膜被覆した基板上に超高密度ZnO自立ナノロッド配列を形成し、上部電極を形成することで、ZnOナノロッドの高密度配列をベースにした圧電素子を作製する。自立ナノロッド配列の面密度を極限まで高めた構造にすることで、圧電応答の向上と高耐久性を付与する。最後にこれを超音波探触子に組み込んで、高温下の超音波探傷試験に耐えることを実証する。

Outline of Final Research Achievements

We demonstrate ultra-high areal density ZnO nanorod (NR) arrays which are grown heteroepitaxially on Au films / Si substrates under low-temperature processes (< 100℃), as detailed in the following (1)-(4).
(1) We developed an in-situ “differential” I-V method for local individual free-standing NRs grown on a substrate to determine their electrical conductivity (σNW).(2) ZnO NR arrays annealed in oxygen ambient is found to reduce σNW by 10-3 times.(3) We realized whole heteroepitaxial ZnO NR / Au film / Si substrate structure by investigating how the crystallinity of Au film impacts on the growth of ZnO NR array. We also revealed their epitaxial relationships.(4) We also demonstrate ZnO NR arrays with improved NR periodicity and NR diameter uniformity by selective growth on Au films using PMMA films template with trigonal hole arrays.

Academic Significance and Societal Importance of the Research Achievements

発電所のタービンや金属・プラスチック等の成型工場など常時高温下に晒されるインフラや大規模設備を、稼働を止めることなく高温下で劣化クラック検出可能な高温超音波探触子の実現が求められている。本研究で探触子用圧電素子として開発した超高面密度・超高配向ZnO自立ナノロッド(NR)配列構造は、キュリー点を持たない圧電体ZnOをナノ構造の密な集合体とすることでナノスケールの構造体が有する特異な弾性(強靭性)を圧電性能向上および耐久性の担保に生かせるという学術的意義を持つ他、デバイス作製を全て100℃以下の低温で安価に行えるという産業応用上の意義も有する。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (23 results)

All 2023 2022 2021 2020 Other

All Presentation (22 results) (of which Int'l Joint Research: 11 results,  Invited: 3 results) Remarks (1 results)

  • [Presentation] 熱伝導率低減に向けた超高面密度Si自立ナノワイヤ周期配列の作製2023

    • Author(s)
      内山 幹太、渡辺 健太郎
    • Organizer
      2023年春季<第70回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超高面密度・完全配向ZnOナノロッド配列の周期構造化に向けたテンプレート基板の検討2023

    • Author(s)
      野呂 拓未、目片 祥、渡辺 健太郎
    • Organizer
      2023年春季<第70回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Solution-based Impurity Doping into Free-Standing Si Nanowire Arrays for Thermoelectric Power Generators2022

    • Author(s)
      Ikutaroh Tanaka, Kentaro Watanabe
    • Organizer
      The 6th Asia-Pacific Conference on Semiconducting Silicides and Related Materials (APAC-Silicide 2022)
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal conductivity measurement of free-standing Si nanowire arrays using embedding organic medium2022

    • Author(s)
      Kentaro Watanabe and Yoshiaki Nakamura
    • Organizer
      The 6th Asia-Pacific Conference on Semiconducting Silicides and Related Materials (APAC-Silicide 2022)
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nanospectroscopic / electrical analyses of individual free-standing semiconductor nanorods using in-situ nanoprobecathodoluminescence technique2022

    • Author(s)
      Kentaro Watanabe
    • Organizer
      The 5th International Union of Materials Research Societies International Conference of Young Researchers on Advanced Materials (IUMRS-ICYRAM 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Heteroepitaxial Chemical Bath Deposition of Ultra-High Density ZnO Nanorod Ar-rays on Au thin-films: Impacts of Au thin-film crystallinity and Periodic Template2022

    • Author(s)
      Sho Mekata, Yuki Murata, Kentaro Watanabe
    • Organizer
      2022 International Conference on Solid State Devices and Materials (SSDM 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impact of Oxygen Annealing Temperature on Electrical Conductivity of Individual Free-standing ZnO Nanowires Studied by In-situ “Differential” I-V Method2022

    • Author(s)
      Kota Miyajima, Yuki Murata, Kentaro Watanabe
    • Organizer
      2022 International Conference on Solid State Devices and Materials (SSDM 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 二次元材料MoS2の結晶粒径拡大に向けたCVD成長条件の検討2022

    • Author(s)
      藤井 駆、岡部 稔也、渡辺 健太郎
    • Organizer
      2022年秋季<第83回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 湿式剥離転写技術を用いた原子層材料の顕微CL分光法の開発2022

    • Author(s)
      岡部 稔也、藤井 駆、渡辺 健太郎
    • Organizer
      2022年秋季<第83回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 添加剤を用いた溶液成長ZnOナノ結晶配列のアスペクト比制御とその薄膜化2022

    • Author(s)
      武内 大和、渡辺 健太郎
    • Organizer
      2022年秋季<第83回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ZnOナノ構造の溶液成長におけるH2O2添加効果の検討2022

    • Author(s)
      北澤 裕太郎、渡辺 健太郎
    • Organizer
      2022年秋季<第83回>応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Nanospectroscopic / electrical analyses of individual free-standing semiconductor nanorods using in-situ nanoprobe-cathodoluminescence technique2022

    • Author(s)
      Kentaro Watanabe
    • Organizer
      The 5th International Union of Materials Research Societies International Conference of Young Researchers on Advanced Materials (IUMRS-ICYRAM 2022)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 酸素雰囲気アニールによるZnO自立ナノロッドの電気絶縁化とそのナノ分光・電気特性評価2021

    • Author(s)
      村田 雄生、宮嶋 航汰、渡辺 健太郎
    • Organizer
      2021年秋季<第82回>応用物理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 単一自立ナノワイヤのその場差分I-V測定による電気伝導率評価2021

    • Author(s)
      宮嶋 航汰、村田 雄生、渡辺 健太郎
    • Organizer
      2021年秋季<第82回>応用物理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超高面密度ZnOナノロッド配列のヘテロエピタキシャル溶液成長とその周期構造化2021

    • Author(s)
      目片 祥、村田 雄生、渡辺 健太郎
    • Organizer
      2021年秋季<第82回>応用物理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 熱電発電応用に向けたSi自立ナノワイヤ配列への高濃度ドーピング2021

    • Author(s)
      田中 幾多郎、渡辺 健太郎
    • Organizer
      2021年秋季<第82回>応用物理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Nanospectroscopic / In-situ Electrical Analyses of Indivudial ZnO Nanowires Insulated by Thermal Annealing in Oxygen Ambient2021

    • Author(s)
      Yuki Murata, Kota Miyajima, Kentaro Watanabe
    • Organizer
      2021 International Conference on Solid State Devices and Materials (SSDM 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In-situ Electrical Conductivity Measurements of Individual Free-standing Nanowires Grown on a Substrate2021

    • Author(s)
      Kota Miyajima, Yuki Murata, Kentaro Watanabe
    • Organizer
      2021 International Conference on Solid State Devices and Materials (SSDM 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Heteroepitaxial Chemical Bath Deposition of Ultra-High Density ZnO Nanorod Arrays on Au films and Au Periodic Templates2021

    • Author(s)
      Sho Mekata, Yuki Murata, Kentaro Watanabe
    • Organizer
      2021 International Conference on Solid State Devices and Materials (SSDM 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impurity Doping and Ohmic Contact Fabrication on Free-Standing Si Nanowire Arrays for Thermoelectric Applications2021

    • Author(s)
      Ikutaroh Tanaka, Kentaro Watanabe
    • Organizer
      2021 International Conference on Solid State Devices and Materials (SSDM 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nanospectroscopic investigation of individual free-standing semiconductor nanorods using in-situ nanoprobe-cathodoluminescence technique2021

    • Author(s)
      Kentaro Watanabe
    • Organizer
      2021 Materials Research Society-Taiwan International Conference (2021 MRSTIC)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 顕微CL法を用いた単原子層シートのナノスケール発光/吸収分光2020

    • Author(s)
      渡辺 健太郎、衣ウェイ、陳 君、窪谷 茂幸
    • Organizer
      2020年秋季<第81回>応用物理学会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 針状ナノ結晶を同じ向きに密に並べた新材料

    • URL

      http://www.shinshu-u.ac.jp/faculty/textiles/research-theme/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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