光捕捉で配向制御した金属ナノ微粒子凝集体と色素分子会合体の光学的相互作用

2010 Fiscal Year Annual Research Report

• Project Area: Strong Photons-Molecules Coupling Fields for Chemical Reactions
• Project/Area Number: 21020034
• Research Institution: Kwansei Gakuin University
• Principal Investigator: 尾崎 幸洋 関西学院大学, 理工学部, 教授 (00147290)
• Co-Investigator(Kenkyū-buntansha): 北濱 康孝 関西学院大学, 理工学研究科, 専門技術員 (00342775)
• Keywords: 表面増強ラマン散乱(SERS) / 局在表面プラズモン共鳴(LSPR) / レーザートラップ / 銀ナノ微粒子凝集体 / 色素分子会合体 / 明滅現象 / プラズモン増強電磁場 / エネルギー移動

Research Abstract

数十μmの長さのアニオン性チアカルボシアニンH会合体にクエン酸還元銀ナノ微粒子を光トラップして、異なる波長で励起することで同じ波長に現れる燐光の増強と消光に成功した。すなわち、514nmで励起した場合は近赤外レーザー光強度を上げるとH会合体からの燐光が増強されたが、568nm励起では逆に燐光が減少した。これは、銀ナノ微粒子の局在表面プラズモン共鳴(LSPR)ピークが568nmに近かったので、568nm励起の方が銀ナノ微粒子接点に生じる光トラップポテンシャルは深くなり、H会合体に接近しすぎることで燐光の表面プラズモン増強よりも金属へのエネルギー移動による消光が起きたためと考えられる。この研究から、励起光や発光の波長および強度によって光スイッチングができる自己組織化有機分子会合体とプラズモニックデバイスが融合した光機能性材料の可能性が示された。
表面増強ラマン散乱(SERS)は極微量な試料でも振動分光が可能な手法であるが、単一分子レベルになると吸着分子のホットサイトへの出入りによると思われる明滅現象が観測され、スペクトル揺らぎや信号強度の低下を引き起こすのでSERSの実用化・高効率化の観点からも、明滅現象の機構解明が重要である。今回、励起光とLSPRの波長の一致具合で光トラップポテンシャルが変化することにより単一分子レベルのSERSで起きる明滅現象に影響が出ることを、明暗状態保持時間の確率分布の冪乗則での解析で示した。すなわち、プラズモン増強ピークが励起波長に近くなると、冪指数が-1.5に接近した。これは一次元ランダムウォークモデルで導出される値であり、プラズモン増強電磁場存在下における吸着分子の拡散の様子を近似していると思われる。

Research Products

• [Journal Article] Power-law analysis of surface-plasmon-enhanced electromagnetic field dependence of blinking SERS of thiacyanine or thiacarbocyanine adsorbed on single silver nanoaggregates (2011)
  • Author(s): Yasutaka Kitahama
  • Journal Title: Phys.Chem.Chem.Phys. Volume: 13 Pages: 7439-7448
  • Peer Reviewed
• [Journal Article] Analysis of excitation laser intensity dependence of blinking SERRS of thiacarbocyanine adsorbed on single silver nanoaggregates by using power law with exponential function (2011)
  • Author(s): Yasutaka Kitahama
  • Journal Title: Chem.Commun. Volume: 47 Pages: 3888-3890
  • Peer Reviewed
• [Journal Article] Two-dimensional correlation localized surface plasmon resonance spectroscopy for analysis of the interaction between metal nanoparticles and bovine serum albumin (2010)
  • Author(s): Bin Tang
  • Journal Title: J.Phys.Chem.C Volume: 114 Pages: 20990-20996
  • Peer Reviewed
• [Journal Article] Label-free rapid semiquantitative detection of proteins down to sub-monolayer coverage by using surface-enhanced Raman scattering of nitrate ion (2010)
  • Author(s): Zhen Zhou
  • Journal Title: Chem.Lett. Volume: 39 Pages: 1203-1205
  • Peer Reviewed
• [Journal Article] Site-specific deposition of Ag nanoparticles on ZnO nanorod arrays via galvanic reduction and their SERS applications (2010)
  • Author(s): Wei Song
  • Journal Title: J.Raman Spectrosc. Volume: 41 Pages: 907-913
  • Peer Reviewed
• [Journal Article] A study of glutathione molecules adsorbed on silver surfaces under different chemical environments by surface-enhanced Raman scattering in combination with the heat-induced sensing method (2010)
  • Author(s): Genin Gary Huang
  • Journal Title: Appl.Spectrosc. Volume: 64 Pages: 1100-1108
  • Peer Reviewed
• [Journal Article] Co-adsorption of electrolyte and protein to Ag colloid observed by surface-enhanced Raman scattering (2010)
  • Author(s): Zhen Zhou
  • Journal Title: Analyst Volume: 135 Pages: 2372-2376
  • Peer Reviewed
• [Journal Article] Power-law statistics in blinking SERS of thiacyanine adsorbed on a single silver nanoaggregate (2010)
  • Author(s): Yasutaka Kitahama
  • Journal Title: Phys.Chem.Chem.Phys Volume: 12 Pages: 7457-7460
  • Peer Reviewed
• [Journal Article] Difference in time dependence of surface-enhanced Raman scattering spectra of thiacarbocyanine J- and H-aggregates adsorbed on single silver nanoaggregates (2010)
  • Author(s): Yasutaka Kitahama
  • Journal Title: Chem.Phys.Lett Volume: 493 Pages: 2309-2313
  • Peer Reviewed
• [Journal Article] Highly sensitive protein concentration assay over a wide range via surface-enhanced Raman scattering of coomassie brilliant blue (2010)
  • Author(s): XiaoXia Han
  • Journal Title: Anal.Chem. Volume: 82 Pages: 4325-4328
  • Peer Reviewed
• [Journal Article] Sensing of polycyclic aromatic hydrocarbons with cyclodextrin inclusion complexes on silver nanoparticles by surface-enhanced Raman scattering (2010)
  • Author(s): Yunfei Xie
  • Journal Title: Analyst Volume: 135 Pages: 1389-1394
  • Peer Reviewed
• [Journal Article] Coomassie brilliant dyes as surface-enhanced Raman scattering probes for protein-ligand recognitions (2010)
  • Author(s): XiaoXia Han
  • Journal Title: Anal.Chem. Volume: 82 Pages: 4102-4106
  • Peer Reviewed
• [Journal Article] Fabrication of one-dimensional ZnO/4-Mpy/Ag assemblies and their spectroscopic studies (2010)
  • Author(s): Hailong Hu
  • Journal Title: J.Colloid and Interface Sci. Volume: 344 Pages: 251-255
  • Peer Reviewed
• [Journal Article] Quantitative evaluation of electromagnetic enhancement in surface-enhanced resonance Raman scattering from plasmonic properties and morphologies of individual Ag nanostructures (2010)
  • Author(s): Ken-ichi Yoshida
  • Journal Title: Phys.Rev.B Volume: 81 Pages: 115406-1-115406-9
  • Peer Reviewed
• [Presentation] H会合体にレーザートラップした銀ナノ微粒子からのラマン散乱及び発光の強度変化 (2011)
  • Author(s): 柏原将人
  • Organizer: 日本化学会第91春季年会(2011)
  • Place of Presentation: 神奈川大学横浜キャンパス
  • Year and Date: 2011-03-07
• [Presentation] Surface-enhanced Raman scattering from photo-reduced Ag nanoaggregate due to an evanescent field (2010)
  • Author(s): Yukihiro Ozaki
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-19
• [Presentation] Study on blinking SERRS using a power-law with exponential function (2010)
  • Author(s): Yasutaka Kitahama
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-19
• [Presentation] Coommassie brilliant blue G-250 as a SERS probe for proteins (2010)
  • Author(s): Xiaoxia Han
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-19
• [Presentation] Quantitative nature of electromagnetic enhancement effect on surface-enhanced resonance Raman scattering (2010)
  • Author(s): Tamitaka Itoh
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-18
• [Presentation] Development of a minimized flexible fiber SERS probe using a hollow optical fiber and Au nanoparticles (2010)
  • Author(s): Toshiaki Suzuki
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-17
• [Presentation] Sensing of polycyclic aromatic hydrocarbons with cyclodextrin inclusion complexes by SERS (2010)
  • Author(s): Yunfei Xie
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-17
• [Presentation] Surface-enhanced resonance Raman scattering spectral shapes sensitive to the refractive index of media around single Ag dimers (2010)
  • Author(s): Tamitaka Itoh
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-17
• [Presentation] Surface-enhanced resonance Raman scattering of optically-trapped dyemolecular aggregate (2010)
  • Author(s): Masato Kashihara
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-17
• [Presentation] Optical interaction between metal nanoaggregate and dye molecular aggregate oriented by optical trapping (2010)
  • Author(s): Yukihiro Ozaki
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-16
• [Presentation] Relation between blinking SERS and surface-plasmon-enhanced optical trapping potential around a junction of a single Ag nanoaggregate (2010)
  • Author(s): Yasutaka Kitahama
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-16
• [Presentation] 表面増強共鳴ラマン散乱明滅現象の励起光強度依存性 (2010)
  • Author(s): 北濱康孝
  • Organizer: 平成22年度日本分光学会年次講演会
  • Place of Presentation: 京都大学吉田キャンパス
  • Year and Date: 2010-11-20
• [Presentation] SERS明滅現象に及ぼすプラズモン増強電磁場の影響 (2010)
  • Author(s): 北濱康孝
  • Organizer: 分子科学討論会2010
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2010-09-16
• [Presentation] レーザートラッピングした色素会合体の表面増強ラマン散乱における、励起光及びトラッピングレーザーの偏光依存性 (2010)
  • Author(s): 柏原将人
  • Organizer: 分子科学討論会2010
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2010-09-15
• [Presentation] Optical analysis of pancreatic cancer tissue model using fluorescence image and Raman spectroscopic techniques (2010)
  • Author(s): Toshiaki Suzuki
  • Organizer: 22^<nd> International Conference on Raman Spectroscopy
  • Place of Presentation: Boston, USA
  • Year and Date: 2010-08-10
• [Presentation] Blinking SERS from single Ag nanoaggregates with various LSPR wavelengths (2010)
  • Author(s): Yukihiro Ozaki
  • Organizer: 22^<nd> International Conference on Raman Spectroscopy
  • Place of Presentation: Boston, USA
  • Year and Date: 2010-08-09
• [Presentation] Blinking of SERRS excited by various laser intensities (2010)
  • Author(s): Yasutaka Kitahama
  • Organizer: 22^<nd> International Conference on Raman Spectroscopy
  • Place of Presentation: Boston, USA
  • Year and Date: 2010-08-09
• [Book] "Raman, Infrared, and Near-Infrared Chemical Imaging" (Eds.Slobodan Sasic, Yukihiro Ozaki), Chapter 15 : Surface-enhanced Raman scattering imaging : Application and experimental approach by far-field with conventional set-up (2010)
  • Author(s): Yasutaka Kitahama
  • Total Pages: 285-299(14)
  • Publisher: Wiley
• [Remarks]
  • URL: http://sci-tech.ksc.kwansei.ac.jp/%7Eozaki/index.html