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Self-Standing Organic Nanowire Sensors: Nanowire Arrays with Ultrahigh Aspect Ratio and Challenge to Homochirality

Research Project

Project/Area Number 22K19061
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 35:Polymers, organic materials, and related fields
Research InstitutionKyoto University

Principal Investigator

Seki Shu  京都大学, 工学研究科, 教授 (30273709)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords超高アスペクト / ナノワイヤ / センサ / Raman / STLiP / 対称性 / クラスタ / ナノ構造 / 粒子線 / イオンビーム / SPNT
Outline of Research at the Start

本研究「超高アスペクト自立型ナノワイヤセンサ:単一粒子反応による対称性の破れへの挑戦」では,加速器により生成した高い運動エネルギーと運動量を有する荷電粒子が物質中を通過する際,その直進飛跡である“超微細な1次元円柱状領域”で誘発する化学反応に着目し,100を超える超高アスペクト比の自立型ナノワイヤセンサを具現化する.新しいナノ構造体・材料を創製しつつ,粒子の回転運動量を形成される材料に転写し得ることを実証し,生体分子における対称性の破れの一因に迫る.

Outline of Final Research Achievements

Herein we report on unique nano-fabrication technique, referred to as Single Particle Triggered Linear Polymerization (STLiP), where 1-dimensional organic nanostructures with ultra-high aspect ratio over 100 from a variety of organic molecules. Majour advantages of STLiP technique are: 1) Free choices of organic molecules confined into the nanostructures free-standing on substrates, 2) The ultra-high aspect ratio inaccessible by conventional any nano-fabrication techniques.
The produced nanowire plexus on substrates have been demonstrated to have extra-wide active surface area for adsorption of analytes, and to be universal platforms for molecular sensing systems with extremely high sensitivity. The nanowire plexus were, in particular, applied to Raman sensing systems of analytes, leading to unique Raman-active materials without any metals embedded in the nanowires.

Academic Significance and Societal Importance of the Research Achievements

従来の材料形成手法では達成し得ない,100を超えるアスペクト比を有しつつ,基板上に自立したナノワイヤ集合体の自由な形成に成功している.最大の特色は,ナノワイヤ形成母体となる有機分子の高い自由選択性にあり,所望の機能を有する分子をもとに,高い活性表面を有する自立型ナノワイヤを実現できることにある.
これらのナノワイヤ集合体をもとに,超高感度センシングシステムとしての実証に成功し,かつ完全に金属を用いないRaman分光センサとしての可能性を示した.ナノ加工技術として過去にない,本研究でのみ得られるナノ材料の形成法である.

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 Other

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

  • [Int'l Joint Research] IUAC(インド)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] GSI Darmstadt(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ストラスブール大学(フランス)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Two‐Step Synthesis of B<sub>2</sub>N<sub>2</sub>‐Doped Polycyclic Aromatic Hydrocarbon Containing Pentagonal and Heptagonal Rings with Long‐Lived Delayed Fluorescence2023

    • Author(s)
      Luo Huan、Wan Qingyun、Choi Wookjin、Tsutsui Yusuke、Dmitrieva Evgenia、Du Lili、Phillips David Lee、Seki Shu、Liu Junzhi
    • Journal Title

      Small

      Volume: 19 Issue: 34 Pages: 2301769-2301769

    • DOI

      10.1002/smll.202301769

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrons lighter than ever2023

    • Author(s)
      Seki Shu、Li Zhuowei
    • Journal Title

      Nature Materials

      Volume: 22 Issue: 7 Pages: 807-808

    • DOI

      10.1038/s41563-023-01563-8

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Hydrogen-Bonded Organic Semiconductors with Long Charge Carrier Lifetimes2022

    • Author(s)
      Nelson Ricardo, vila-Rovelo, Gabriel Martinez, Wakana Matsuda, Stephan Sinn, Patrick, Duncan Schwaller, Philippe, Shu Seki, Amparo Ruiz-Carretero
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 126 Issue: 26 Pages: 10932-10939

    • DOI

      10.1021/acs.jpcc.2c03105

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Solid-Solid transition of microcrystalline oligo (phenylene ethynylene) s: impact of crystalline structure on optoelectronic properties2022

    • Author(s)
      Yusuke Hattori, Wakana Matsuda, Shu Seki
    • Journal Title

      Chemical Physics Letters

      Volume: 801 Pages: 139709-139709

    • DOI

      10.1016/j.cplett.2022.139709

    • Related Report
      2022 Research-status Report
    • Peer Reviewed

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Published: 2022-07-05   Modified: 2025-01-30  

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