Photochemical reaction dynamics of hybrid structures composed of metal nanoparticle and organic layer studied by time- and space-resolved spectroscopy

2009 Fiscal Year Self-evaluation Report

• Project Area: Strong Photons-Molecules Coupling Fields for Chemical Reactions
• Project/Area Number: 19049011
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Osaka University
• Principal Investigator: ASAHI Tsuyoshi Osaka University, 大学院・工学研究科, 准教授 (20243165)
• Project Period (FY): 2007 – 2010
• Keywords: ナノ粒子 / プラズモン共鳴 / 光反応 / 顕微分光

Research Abstract

金や銀のナノ構造近傍の分子や分子凝集体は、局在表面プラズモン共鳴を介した光との強い相互作用により、溶液やバルク固体とは異なる吸収・発光や光反応を起こすことが期待される。本研究では、金属ナノ粒子表面を色素や光異性化分子の薄膜で被覆した金属-分子複合ナノ構造を作製し、局在増強光電場による光反応の高効率化の提案と検証を行う。さらに、光反応に対するプラズモン共鳴効果を単一粒子・ナノ構造レベルで分光計測できる装置を開発し、粒子のサイズ・形状や会合状態に強く依存するプラズモン共鳴と分子の光反応や励起状態ダイナミクスの関係を直接明らかにし、プラズモン共鳴による局在電場増強効果の機構を解明する。

Research Products

• [Journal Article] Light-controllable surface plasmon resonance absorption of gold nanoparticles covered with photochromic diarylethene polymers (2009)
  • Author(s): Hiroyasu Nishi, Tsuyoshi Asahi, Seiya Kobatake
  • Journal Title: J. Phys. Chem. C 113 Pages: 17359-17366
  • Peer Reviewed
• [Journal Article] Spectral and 3-dimensional tracking of single gold nanoparticles in living cells studied by Rayleigh light scattering microscopy (2009)
  • Author(s): Guillaume Louit, Tsuyoshi Asahi, Go Tanaka, Takayuki Uwada, Hiroshi Masuhara
  • Journal Title: J. Phys. Chem. C 113 Pages: 11766-11772
  • Peer Reviewed
• [Journal Article] Enhancement of Excimer Fluorescence from Thin Dye Film by Single Gold Nanoparticles (2009)
  • Author(s): Guillaume Laurent, Tsuyoshi Asahi
  • Journal Title: Chem. Lett. 38 Pages: 332-333
  • Peer Reviewed
• [Journal Article] Fabrication of gold nanoparticle- doped zeolite L crystals and characterization by optical microscopy: Laser ablation- and crystallization inclusion-based approach (2008)
  • Author(s): Syu-ichi Hashimoto, Takayuki Uwada, Hiroshi Masuhara, Tsuyoshi Asahi
  • Journal Title: J. Phys. Chem. C 112 Pages: 15089-15093
  • Peer Reviewed
• [Journal Article] Analysis of localized surface plasmon resonance by elastic light scattering spectroscopy of individual Au nanoparticles for surface- enhanced Raman scattering (2007)
  • Author(s): Tamitake Itoh, Takayuki Uwada, Tsuyoshi Asahi, Yukihiro Ozaki, Hiroshi Masuhara
  • Journal Title: Canadian Journal of Analytical Sciences and Spectroscopy 52 Pages: 130-141
  • Peer Reviewed
• [Presentation] Laser-induced spectral change of plasmon resonance band of single gold nanoparticles studied by confocal light scattering microspectroscopy (2009)
  • Author(s): Tsuyoshi Asahi, Go Tanaka
  • Organizer: The 6th Korea-Japan Symposium on Frontier Photoscience
  • Place of Presentation: Sejong, Korea
  • Year and Date: 2009-10-31
• [Presentation] Photochromic reaction of diarylethene near gold nanoparticles studied by light scattering microspectroscopy (2009)
  • Author(s): Tsuyoshi Asahi, Kazuyasu Satake, Hiroyasu Nishi, Seiya Kobatake
  • Organizer: The XXIV International Conference on Photochemistry
  • Place of Presentation: Toledo, Spain
  • Year and Date: 2009-07-20
• [Presentation] Plasmonic enhancement of photochromic reaction by gold and silver nanoparticles (2008)
  • Author(s): Tsuyoshi Asahi, Kazuyasu Satake, Hiroyasu Nishi, Seiya Kobatake
  • Organizer: IUPAC Symposium on Photochemistry
  • Place of Presentation: Gothenburg, Sweden
  • Year and Date: 2008-08-30
• [Presentation] Single particle spectroscopy and tracking of gold nanospheres in living cells by conforcal light scattering microscopy (2008)
  • Author(s): Tsuyoshi Asahi, Takayuki Uwada, Guillaume Louit, Hiroshi Masuhara
  • Organizer: 2008 IEEE/LEOS Summer Topical Meeting on Advanced Nanobiophotonics
  • Place of Presentation: Acapulco, Mexico
  • Year and Date: 2008-07-22
• [Book] 金ナノテクノロジー (2008)
  • Author(s): 朝日剛(分担執筆, 他31名)
  • Publisher: シーエムシー出版