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Surface termination that plays important roles in structural and physical properties of silicon nanocrystals - For a variety of device formations

Research Project

Project/Area Number 18K04242
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionUniversity of Hyogo

Principal Investigator

Sato Seiichi  兵庫県立大学, 理学研究科, 助教 (90326299)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsシリコンナノ粒子 / シリコンナノコロイド / ゲルマニウムナノコロイド / 有機単分子層 / シリコンナノ結晶 / フラッシュ光照射 / 結晶成長 / ナノシリコン / ナノコロイド / 表面修飾 / ナノ粒子インク
Outline of Final Research Achievements

We studied crystal structures and physical properties of silicon nanoparticles after flash light irradiation or annealing. The surface silicon atoms of the nanoparticles were terminated with alkoxy and thiol groups, which are known as lattice-strain inducing and relaxing modifiers, respectively. By the flash light irradiation at room temperature, the diamond structured crystals were grown in both types of the nanoparticles, but a metastable structure was also found in the alkoxy terminated nanoparticles. By annealing the thiol terminated silicon nanoparticle films, narrow-gap porous silicon films with the bandgap energy of about 0.3 eV were obtained.

Academic Significance and Societal Importance of the Research Achievements

チオリンゴ酸修飾シリコンナノ粒子に窒素中250℃以上の熱処理を施すことで、それまで半導体的であったシリコンナノ粒子が金属的になることが明らかになった。このシリコンナノ粒子の導電性は雰囲気ガスの変化に大きく依存するため、新たな抵抗変化材料として期待できる。
また、シリコンナノ粒子・ゲルマニウムナノ粒子の混合膜に非平衡の結晶成長をさせたところ、正方晶ゲルマニウムと思われる結晶成長が確認された。これは、シリコン微結晶が結晶核となり、そこにゲルマニウム結晶が整合して成長することで形成されたものと考えられた。この現象は新構造ゲルマニウムの生成として興味深い。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Photocurrent characteristics of nanostructured thin films consisting of surface-modified silicon nanoparticles2019

    • Author(s)
      Ryu-ichi Yoshikado, Takayuki Hasegawa, Yoshihito Tanaka, Shuhei Tsubota, and Seiichi Sato
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1220 Issue: 1 Pages: 012048-012048

    • DOI

      10.1088/1742-6596/1220/1/012048

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 水溶性ゲルマニウムナノ粒子の作製と熱・光による粒子の構造変化2021

    • Author(s)
      大砂滉志郎,木村健太,坪田秀平,小林幹弘,藤田和宣,佐藤井一
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] ボールミル粉砕により形成されるシリコンナノ粒子の構造評価:表面有機分子の影響2021

    • Author(s)
      木村健太,大砂滉志郎,佐藤井一
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 光で結晶化するナノシリコンインク2020

    • Author(s)
      佐藤井一
    • Organizer
      イノベーション・ジャパン2020
    • Related Report
      2020 Research-status Report
  • [Presentation] ナノメートルサイズのシリコンで目指す室温結晶化の試み2020

    • Author(s)
      佐藤井一
    • Organizer
      兵庫県立大学知の交流シンポジウム2020連携セミナー第5回
    • Related Report
      2020 Research-status Report
  • [Presentation] シリコンナノコロイド塗布膜の熱・光焼結:表面修飾分子の熱安定性と室温フラッシュ光照射によるナノシリコンの結晶性向上2019

    • Author(s)
      鈴木宏和,坪田秀平,小林幹弘,藤田和宣,佐藤井一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Photocurrent characteristics of nanostructured thin films consisting of surface-modified silicon nanoparticles2018

    • Author(s)
      R. Yoshikado, T. Hasegawa, Y. Tanaka, S. Tsubota, S. Sato
    • Organizer
      The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Crystal structure distortion of silicon and germanium nanocrystals: Tendency toward compact phase formation2018

    • Author(s)
      S. Sato
    • Organizer
      Collaborative Conference on Materials Science and Technology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Production, Structural and Electrical Characterization of Silicon and Germanium Nanoparticle Inks2018

    • Author(s)
      S. Tsubota, K. Tanaka, W. Nagoya, S. Tanabe, S. Hombo, Y. Morisako, S. Sato
    • Organizer
      Collaborative Conference on Materials Science and Technology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 表面修飾Siナノ粒子で形成した構造膜の光電流特性2018

    • Author(s)
      吉角龍一, 長谷川尊之, 田中義人, 坪田秀平, 佐藤井一
    • Organizer
      第29回光物性研究会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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