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Fabrication of Oriented Carbon Nanowire Arrays via Solid-State Polymerization in Ultrafine Nanospaces

Research Project

Project/Area Number 21K19004
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 Institute of Technology

Principal Investigator

Sakurai Tsuneaki  京都工芸繊維大学, 分子化学系, 准教授 (50632907)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsナノワイヤ / 垂直配向 / 直立構造 / 粒子線 / 固相重合 / ヘテロ界面 / 直立 / 共役化合物 / カーボン
Outline of Research at the Start

巨視配向したナノワイヤは、ナノスケールの異方機能を損なうことなく実デバイススケールで発現させるための鍵構造である。本研究では、有機薄膜への高エネルギー荷電粒子照射により粒子の飛跡である超微細ナノ空間で固相重合反応を引き起こし、垂直配向有機ナノワイヤアレイを構築する。「粒子一個がナノワイヤ一本」に対応する原理により、太さ10 nm程度、所望の数密度・長さで均一な配向ナノワイヤ創製が可能となる。同軸ナノワイヤ、ブロックコナノワイヤといったヘテロ構造への展開とともに、焼成により配向カーボンナノワイヤを実現し、その一軸異方的なエネルギー・電荷の輸送、表面撥水性、静電アクチュエータへの応用に取り組む。

Outline of Final Research Achievements

The unique method in this research yields wire-shaped nano-objects with controlled length and number density by just tuning the thickness of the target thin films and fluence of the incident high-energy ion beams, respectively. High-energy particles give their kinetic energy to a limited nm-sized cylindrical area along their trajectories, affording insoluble nanogels (nanowires) via polymerization and cross-linking of the materials. We have established the method to allow uniaxially-aligned vertical nanowire arrays and their functionalization by using small molecular materials as starting materials and applying sublimation instead of solvent immersion. After the nanowires formed by irradiations, the use of sublimation results in the uniaxially-orientated nanowires. Block-co-type and coaxial-type nanowires were prepared by using bilayer organic films as starting films and by the post-electropolymerization of thiophenes around oriented nanowires on an electrode, respectively.

Academic Significance and Societal Importance of the Research Achievements

無機材料ではSiやZnO等の半導体ナノワイヤの「ボトムアップ成長」や「電子線リソグラフィによるトップダウン構築」が確立され、垂直配向ワイヤの報告例がある。一方、有機材料では一部の有機化合物を結晶成長制御でのみ達成されており、可能な有機物の種類が極めて限定的であるばかりか、その径は100 nm以上であり、ナノワイヤと呼ぶには大きな構造体であった。本研究成果は、この背景を覆す革新的なものである。
本成果は、半導体微細加工技術の革新につながることが期待される。また、極微細な直立ナノワイヤの巨大表面積を利用した化学物質・ウィルス等を対象にした高感度センサーや、高効率な触媒特性表面への展開も期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Int'l Joint Research] GSI(重イオン研究所)(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Amplified spontaneous emission from a liquid crystalline phase: anisotropic property and active modulation2024

    • Author(s)
      Tsutsui Yusuke、Sakurai Tsuneaki、Seki Shu
    • Journal Title

      Faraday Discussions

      Volume: 250 Pages: 271-280

    • DOI

      10.1039/d3fd00122a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Side-Chain Labeling Strategy for Forming Self-Sorted Columnar Liquid Crystals from Binary Discotic Systems2023

    • Author(s)
      Sakurai Tsuneaki、Kato Kenichi、Shimizu Masaki
    • Journal Title

      Crystals

      Volume: 13 Issue: 10 Pages: 1473-1473

    • DOI

      10.3390/cryst13101473

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Organic Fluorophores That Emit Ultraviolet Light in the Aggregated States2022

    • Author(s)
      Masaki Shimizu, Tsuneaki Sakurai
    • Journal Title

      Aggregate

      Volume: 3 Issue: 2

    • DOI

      10.1002/agt2.144

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Oriented Nanowire Arrays with Phthalocyanine – C<sub>60</sub> Multi-Heterojunctions2021

    • Author(s)
      Nobuoka Masaki, Koshi Kamiya, Shugo Sakaguchi, Tsuneaki Sakurai, Shu Seki
    • Journal Title

      Journal of Photopolymer Science and Technology

      Volume: 34 Issue: 2 Pages: 167-174

    • DOI

      10.2494/photopolymer.34.167

    • NAID

      130008119676

    • ISSN
      0914-9244, 1349-6336
    • Year and Date
      2021-06-11
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ubiquitous organic molecule-based free-standing nanowires with ultra-high aspect ratios2021

    • Author(s)
      Kamiya Koshi、Kayama Kazuto、Nobuoka Masaki、Sakaguchi Shugo、Sakurai Tsuneaki、Kawata Minori、Tsutsui Yusuke、Suda Masayuki、Idesaki Akira、Koshikawa Hiroshi、Sugimoto Masaki、Lakshmi G. B. V. S.、Avasthi D. K.、Seki Shu
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 4025-4025

    • DOI

      10.1038/s41467-021-24335-x

    • NAID

      120007142195

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Charge Carrier Mobility of 1,6-Dibromopyrene Single Crystal Grown by Solution Method on Substrate2021

    • Author(s)
      Kojiro Naito, Yuhi Inada, Tsuneaki Sakurai, Masaki Shimizu, Takeshi Yamao
    • Journal Title

      Journal of Electronic Materials

      Volume: 51 Issue: 2 Pages: 813-821

    • DOI

      10.1007/s11664-021-09345-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Remarkable Increase of Fluorescence Quantum Efficiency by Cyano Substitution on An ESIPT Molecule 2-(2-Hydroxyphenyl)benzothiazole: Highly Luminescent Liquid Crystal Dopant2021

    • Author(s)
      Tsuneaki Sakurai, Masaya Kobayashi, Hiroyuki Yoshida, Masaki Shimizu
    • Journal Title

      Crystals

      Volume: 11 Issue: 9 Pages: 1105-1105

    • DOI

      10.3390/cryst11091105

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ultra-fast single-crystal polymerization of large-sized covalent organic frameworks2021

    • Author(s)
      Lan Peng, Qianying Guo, Chaoyu Song, Samrat Ghosh, Huoshu Xu, Liqian Wang, Dongdong Hu, Lei Zhao, Qiaowei Li, Tsuneaki Sakurai, Hugen Yan, Shu Seki, Yunqi Liu, Dacheng Wei
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 5077-5077

    • DOI

      10.1038/s41467-021-24842-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 有機薄膜へのイオンビーム照射による超微細ナノワイヤの構築2023

    • Author(s)
      櫻井 庸明
    • Organizer
      第4回先鋭固体化学・物理に関する討論会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Fabrication of Standing Nanowire Arrays by Heavy Ion Irradiation-Triggered Intra-Track Polymerization of Organic Molecules2022

    • Author(s)
      Tsuneaki Sakurai
    • Organizer
      IAEA Technical Meeting on "Recent Development in Nanomaterials and Nanotechnology"
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 粒子線照射固相重合法による超微細直立有機ナノワイヤの構築2022

    • Author(s)
      櫻井 庸明
    • Organizer
      第76回放射線科学研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 粒子線照射固相重合を用いた超微細高分子ナノワイヤの形成2022

    • Author(s)
      櫻井 庸明
    • Organizer
      第68回高分子研究発表会(神戸)
    • Related Report
      2022 Research-status Report
  • [Presentation] Fabrication of Organic Nanowires Developed by Radiation-Triggered Polymerization of Organic Molecules in Heavy Ion Tracks2022

    • Author(s)
      Tsuneaki Sakurai
    • Organizer
      The Miller Online Workshop on Radiation Chemistry
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Standing Organic Nanowire Arrays Developed by Radiation-Induced Polymerization of Organic Molecules in Heavy Ion Tracks2021

    • Author(s)
      Tsuneaki Sakurai
    • Organizer
      2nd Research Coordination Meeting on "Enhancing the Beneficial Effects of Radiation Processing in Nanotechnology"
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 単一粒子と有機分子の相互作用によるナノ構造体形成2021

    • Author(s)
      坂口 周悟, 櫻井 庸明, 出崎 亮, 越川 博, 杉本 雅樹, 八巻 徹也, 関 修平
    • Organizer
      第 64 回放射線化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Oriented Nanowire Arrays with Phthalocyanine-C60 Multi-Hetero Junctions2021

    • Author(s)
      Masaki Nobuoka, Koshi Kamiya, Shugo Sakaguchi, Tsuneaki Sakurai, Shu Seki
    • Organizer
      The 38th International Conference of Photopolymer Science and Technology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2025-01-30  

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