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Study and control of long-range exciton transport in organic and hybrid nanostructures for future exciton-based electronics

Research Project

Project/Area Number 21K18927
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Vacha Martin  東京工業大学, 物質理工学院, 教授 (50361746)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsexciton transport / fluorescence microscopy / Exciton transport / 励起子輸送
Outline of Research at the Start

本研究の目的は、メゾスコピック有機および有機・無機ハイブリッド構造におけるマイクロメートルスケール長距離励起子輸送のための主要な設計原理を理解し、さらに励起子輸送効率を積極的に制御する方法を発見することである。本研究が成功裏に完了すれば、高速で低エネルギー消費のナノスケールデバイスを提案することにより、エレクトロニクスの分野に革命を起こす可能性のある励起子エレクトロニクスの開発への道が開かれる。

Outline of Final Research Achievements

Exciton transport in molecular and supramolecular structures was studied with the aim of understanding the key factors for long-range exciton transport in mesoscopic organic and hybrid systems. Simultaneous measurements by fluorescence and atomic force microscopy on self-assembled supramolecular nanofibers and their bundles showed that 3-dimensional mesostructures function as efficient light waveguides. On the other hand, 1-dimensional nanofibers exhibit long exciton diffusion lengths on the order of several hundreds of nanometers. Such large diffusion length values were explained by the formation of oblique molecular aggregates between individual monomers within the nanofibers. Further, the effect of topology on the exciton diffusion was studied using self-assembled supramolecular nanorings. Absorption and fluorescence polarization anisotropy together with theoretical simulations showed that the exciton transport along the nanorings is limited to several nanometers.

Academic Significance and Societal Importance of the Research Achievements

研究成果の科学的意義は、自己組織化超分子ナノファイバー内での長距離励起子輸送の発見にある。 このような長距離での励起子拡散の報告は他に数件しかなく、本成果は、この現象が斜めの分子集合体の存在によって起こることを初めて解明した。また、本研究の社会的意義は、電流の代わりに励起子輸送によって駆動される励起子エレクトロニクス分野の基礎原理を探求することである。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 Other

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Dynamic molecular conformational change leading to energy transfer in F8-5% BSP copolymer revealed by single-molecule spectroscopy2022

    • Author(s)
      Yan Hao、Tseng Tzu-Wei、Omagari Shun、Hamilton Iain、Nakamura Tomonori、Vacha Martin、Kim Ji-Seon
    • Journal Title

      The Journal of Chemical Physics

      Volume: 156 Issue: 7 Pages: 074704-074704

    • DOI

      10.1063/5.0080406

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Enhancement of the Photocurrent of a Single Photosystem I Complex by the Localized Plasmon of a Gold Nanorod2021

    • Author(s)
      Furuya Ryotaro、Omagari Shun、Tan Qiwen、Lokstein Heiko、Vacha Martin
    • Journal Title

      Journal of the American Chemical Society

      Volume: 143 Issue: 33 Pages: 13167-13174

    • DOI

      10.1021/jacs.1c04691

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Real-time monitoring and control of photophysics of polyfluorenes and other nanoscale systems on single-molecule level2022

    • Author(s)
      Martin Vacha
    • Organizer
      14th International Conference on Hole Burning, Single Molecule and Related Spectroscopies, Bayreuth, Germany
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electroluminescence at the nanoscale: Single-molecule and single-particle spectroscopy of conjugated polymers and perovskite nanocrystals2022

    • Author(s)
      Martin Vacha
    • Organizer
      13th International Conference of Electroluminescence and Optoelectronic Devices, London, UK
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Single-Molecule Spectroscopy in Physics and Chemistry of Materials: From Conjugated Polymers and Perovskite Nanocrystals to Photosynthetic Systems2021

    • Author(s)
      Vacha Martin
    • Organizer
      RIES-Hokudai International Symposium
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Excitonic coupling phenomenon directly revealed on single chains of polyfluorene by combined force spectroscopy and fluorescence microscopy2021

    • Author(s)
      Vacha Martin
    • Organizer
      30th International Conference on Photochemistry
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] Vacha研究室

    • URL

      http://www.op.titech.ac.jp/lab/vacha/index.html

    • Related Report
      2022 Annual Research Report

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Published: 2021-07-13   Modified: 2024-01-30  

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