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Mechanism study of metallic oxide nanorods fabricated by submerged photosynthesis of crystallites

Research Project

Project/Area Number 20K15122
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionHokkaido University

Principal Investigator

JEEM MELBERT  北海道大学, 電子科学研究所, 助教 (00815805)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsナノロッド / 電子顕微鏡 / 第一原理計算 / 光合成 / ZnO / Nanorods / Simonkolleite / STEM-VEELS / DFT / photo-synthesis / Cathodoluminescence / 水中結晶光合成 / ガルバニック効果 / 金属酸化物
Outline of Research at the Start

本研究は水中での光照射によってZn, Cu, Fe, W, Ce 等の金属基板からその酸化物ナノロッドを大面積に成長する現象を見出し、水中結晶光合成法 (SPSC: Submerged Photo-Synthesis of Crystallites) と命名した。ZnOナノロッドについて、成長過程が欠陥準位を利用した水分解及び光ラジカル反応に起因していることを明らかにした。一方、異種金属基板上への成長が原理的に可能である。本研究では、様々な金属酸化物ナノロッドを異種金属基板上に形成し、それらの界面に生じる構造の変化や欠陥準位を、走査型透過電子顕微鏡を用いて詳細に調査する。

Outline of Final Research Achievements

The research utilizes submerged photosysnthesis of crystallites (SPSC) method for metallic oxide nanostructures fabrication. Further, galvanic reaction was incorporated for facile ZnO/CuO hetero-nanorods synthesis. To elucidate the growth mechanism, STEM-VEELS, electron density of states (DOS) calculation based on crystal model, as well as optical reponse measurement were performed on the ZnO/CuO junction. On the basis of TEM observation, ZnO/CuO junction was established on {110} plane with <0.5% lattice mismatch. DOS calculation showed electrons transfer from CuO to ZnO, and interaction between interstitial Zn (IZn) and oxygen vacancy (Vo) is the reason for ZnO/CuO inheritance optical response.

Academic Significance and Societal Importance of the Research Achievements

SPSC法は、様々な金属基板に多種多様な金属酸化物のナノロッドを安価で簡便に大面積成長させることができることから産業応用上有利であり、さらに金属-金属酸化物ナノロッドの接合界面を舞台とした光エレクトロニクスや光エネルギー変換工学の学術領域の発展に貢献し、太陽電池、殺菌デバイス、ガスセンサー、光メッキ等、様々なデバイス開発にも利用できる。さらに、光と水を用いて水素と金属酸化物のみを生成する、グリーンテクノロジーであることも大きな強みである。

Report

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

    (8 results)

All 2022 2021 2020

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

  • [Journal Article] The origin of opto-functional enhancement in ZnO/CuO nanoforest structure fabricated by submerged photosynthesis2022

    • Author(s)
      Takahashi Yuki、Jeem Melbert、Zhang Lihua、Watanabe Seiichi
    • Journal Title

      Applied Materials Today

      Volume: 26 Pages: 101359-101359

    • DOI

      10.1016/j.apmt.2021.101359

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fabrication of color-toned micro/nanopattern surface by submerged photosynthesis method2022

    • Author(s)
      Tsukamura Jumpei、Takahashi Yuki、Zhang Lihua、Jeem Melbert、Okamoto Kazumasa、Watanabe Seiichi
    • Journal Title

      Microelectronic Engineering

      Volume: 256 Pages: 111727-111727

    • DOI

      10.1016/j.mee.2022.111727

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Photo- & radio-chromic iron-doped tungstic acids fabricated via submerged photosynthesis2022

    • Author(s)
      Murakami Shuntaro、Zhang Lihua、Jeem Melbert、Okamoto Kazumasa、Nakagawa Yuki、Shibayama Tamaki、Ohnuma Masato、Watanabe Seiichi
    • Journal Title

      Optical Materials

      Volume: 124 Pages: 111966-111966

    • DOI

      10.1016/j.optmat.2021.111966

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The origin of opto-functional enhancement in ZnO/CuO nanoforest structure fabricated by submerged photosynthesis2022

    • Author(s)
      Jeem Melbert, Takahashi Yuki, Zhang Lihua, Watanabe Seiichi
    • Organizer
      The 69th JSAP Spring Meeting 2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] Understanding opto-electrical emission and absorption behavior in corrosion by-product of zinc2021

    • Author(s)
      Jeem Melbert, Fujioka Masaya, Ono Madoka, Watanabe Seiichi, Nishii Junji
    • Organizer
      MNC 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multi-defects effect for ZnO lattice reconfiguration during submerged photo-synthesis of crystallites2021

    • Author(s)
      Jeem Melbert, Fujioka Masaya, Ono Madoka, Watanabe Seiichi, Nishii Junji
    • Organizer
      令和3年度日本顕微鏡学会北海道支部学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Local oxygen-deficiency in ZnO nanorods and their opto-electrical properties measurement via STEM-VEELS2020

    • Author(s)
      Melbert Jeem
    • Organizer
      微細構造解析プラットフォームワークショップ2020
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Low-temperature cathodoluminescence study of patterned ZnO nanorods fabricated by submerged photo-synthesis2020

    • Author(s)
      Melbert Jeem
    • Organizer
      公益社団法人日本顕微鏡学会第63回シンポジウム
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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