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Optical second harmonic generation microscopy of the self-assembly process of amphiphilic chiral molecules

Research Project

Project/Area Number 16K17786
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Biological physics/Chemical physics/Soft matter physics
Research Institution防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群)

Principal Investigator

Yoshihiro Miyauchi  防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群), 応用科学群, 准教授 (70467124)

Research Collaborator Suzuki Takanori  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsLangmuir-Blodgett 単分子膜 / 気液界面 / 光第二高調波発生 / H会合体 / 双極子-双極子相互作用 / Langmuir-Blodgett膜 / 会合体形成 / H会合形成 / 双極子双極子相互作用 / Langmuir-Blodgget膜 / シアニン色素 / 自己組織化 / キラリティー / 両親媒性分子 / 顕微法 / 表面・界面物性 / 非線形光学
Outline of Final Research Achievements

In this study, as a first step to elucidate the self-assembly process of amphiphilic chiral molecules, optical second harmonic generation (SHG) signals from a cyanine dye during compression of a monolayer in a Langmuir-Blodgett (LB) trough were measured. SHG signals from the monolayer were obtained as the surface area decreased for the input and output polarization combinations. We estimated the mean polar angles from the SHG responses during compression. The angle decreased with the growth of domains in the Liquid Condensed (LC) phase, but then temporarily became constant during the compression process. The decrease of the angle in the LC phase probably allowed the cyanine dyes to pack together tightly and the repulsive force between the molecules might reduce the change of the angle. From the results, it was demonstrated that the details of the molecular dynamics of the LB monolayer could be studied by the SHG method.

Academic Significance and Societal Importance of the Research Achievements

LB膜形成過程の中でも自己組織化的な単分子膜の形成によって液相間の相転移が起きていることが知られており、キラル分子の場合そのキラリティを反映したドメイン形成が起きることが知られている。両親媒性色素分子がこの様な相転移を伴いながらH会合体を形成するという過程はこれまでよく理解されていなかった。本研究では液相においてその単分子膜の分子配向角がわずかに減少するとH会合体が形成し、さらに液相の終わりに準安定な膜の秩序が存在することを示した。この成果はキラルドメイン形成過程のモデルケースとして重要な知見を与えるばかりでなく、単分子膜を電子、光学デバイスに応用する上でも大きな意義があると考えられる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (11 results) (of which Int'l Joint Research: 7 results)

  • [Journal Article] Observation by optical second harmonic generation of the mean tilt angle of cyanine dyes during compression with a phase transition in a Langmuir-Blodgett trough2019

    • Author(s)
      Y.Miyauchi, R. Yukutake, K. Tsuchida, Y. Umemura, A. Tsukamoto, and T. Suzuki
    • Journal Title

      Chemical Physics

      Volume: 517 Pages: 85-90

    • DOI

      10.1016/j.chemphys.2018.09.028

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of the oxide thickness of a SiO2/Si(001) substrate on the optical second harmonic intensity of few-layer MoSe22016

    • Author(s)
      Y. Miyauchi, R. Morishita, M. Tanaka, S. Ohno, G. Mizutani and T. Suzuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 55 Issue: 8 Pages: 085801-085801

    • DOI

      10.7567/jjap.55.085801

    • NAID

      210000146948

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] Langmuir-Blodgett膜成膜過程におけるシアニン色素単分子膜の分子配向変化の光第二高調波発生法による観測2018

    • Author(s)
      宮内良広、行武里沙、土田魁皇、梅村泰史、塚本哲、鈴木隆則
    • Organizer
      2018年日本物理学会秋期大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] The molecular orientation of a Langmuir-Blodgett monolayer during the compression process obtained by optical second harmonic generation2018

    • Author(s)
      Yoshihiro Miyauchi, Risa Yukutake, Kaiou Tsuchida, Yasushi Umemura, Akira Tsukamoto, and Takanori Suzuki
    • Organizer
      14th International Conference on Atomically Controlled Surfaces
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detailed SHG spectra of monolayer transition-metal dichalcogenides measured in the non-linear optical microscopy2017

    • Author(s)
      Y. Kikuchi, Y. Miyauchi, T. Suzuki, M. Tanaka and S. Ohno
    • Organizer
      International Symposium on Surface Science 8th International Symposium on Surface Science
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] In-situ SHG measurements in the LB monolayer during the compression process2017

    • Author(s)
      Y. Miyauchi, R. Yukutake, K. Tsuchida, Y. Umemura and T. Suzuki
    • Organizer
      8th International Symposium on Surface Science
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] The dielectric function of atomically thin MoS2, MoSe2, WS2, and WSe2 observed by linear and non-linear optical measurements2017

    • Author(s)
      Y. Kikuchi, Y. Miyauchi, T. Suzuki, M. Tanaka and S. Ohno
    • Organizer
      5th Ito International Research Center Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Linear and nonlinear spectroscopy of monolayer transition-metal dichalcogenides under a microscope2017

    • Author(s)
      Y. Kikuchi, Y. Miyauchi, T. Suzuki, M. Tanaka and S. Ohno
    • Organizer
      International Symposium on Atomic Level Characterization for New Materials and Devices ’17
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 遷移金属ダイカルコゲナイド(層状化合物半導体)の顕微鏡下における非線形光学分光測定2017

    • Author(s)
      菊池悠平,宮内良広,鈴木隆則, 田中正俊,大野真也
    • Organizer
      日本物理学会2017秋期大会(岩手大学,2017年9月21日)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 単層化合物半導体で発生する光第二高調波の基板における干渉効果2017

    • Author(s)
      菊地 悠平、宮内 良広、森下 亮、田中 正俊、大野 真也、鈴木 隆則
    • Organizer
      第64回応用物理学科春季学術講演会
    • Place of Presentation
      パシフィコ横浜
    • Related Report
      2016 Research-status Report
  • [Presentation] Linear and nonlinear spectroscopy of monolayer transition-metal dichalcogenides: MoS2, MoSe2, WS2, and WSe22016

    • Author(s)
      Y. Kikuchi, Y. Miyauchi, M. Tanaka, S. Ohno and T. Suzuki
    • Organizer
      8th Workshop on Advanced Spectroscopy of Organic Materials for Electronic Applications (ASOMEA-VIII)
    • Place of Presentation
      Institute for Molecular Science, Japan
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 数層の層状化合物半導体の線形および非線形光学測定2016

    • Author(s)
      菊池悠平,宮内良広,田中正俊,大野真也,鈴木隆則
    • Organizer
      2016年真空・表面科学合同講演会
    • Place of Presentation
      名古屋国際会議場
    • Related Report
      2016 Research-status Report
  • [Presentation] SiO2/Si(001)基板上の単層化合物半導体からの光第二次高調波発生(SHG)信号の酸化膜厚による影響2016

    • Author(s)
      宮内良広,森下亮,田中正俊,大野真也,水谷五郎,鈴木隆則
    • Organizer
      日本光学会年次学術講演会
    • Place of Presentation
      筑波大学東京キャンパス文京校舎
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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