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光熱変換現象と化学計測

Research Project

Project/Area Number 07102004
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Chemistry
Research InstitutionThe University of Tokyo

Principal Investigator

澤田 嗣郎  東京大学, 大学院・工学系研究科, 教授 (90011105)

Co-Investigator(Kenkyū-buntansha) 原田 明  九州大学, 大学院・総合理工学研究科, 助教授 (90222231)
北森 武彦  東京大学, 大学院・工学系研究科, 助教授 (60214821)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥218,000,000 (Direct Cost: ¥218,000,000)
Fiscal Year 1997: ¥47,000,000 (Direct Cost: ¥47,000,000)
Fiscal Year 1996: ¥74,000,000 (Direct Cost: ¥74,000,000)
Fiscal Year 1995: ¥97,000,000 (Direct Cost: ¥97,000,000)
Keywords光熱変換 / 単分子 / フェムト秒 / ピコ秒 / 熱レンズ / マイクロチャネル / 超微粒子 / 集積化 / 光熱変換現象 / 無輻射プロセス / 溶液化学 / 固液界面化学 / 少数分子 / 微小空間 / 超高速現象 / レーザー分光分析
Research Abstract

光が熱に変わる現象(光熱変換現象)を利用した独自の原理に基づく熱レンズ顕微鏡を、光学配置の最適化や光を回折限界まで絞り込むことで、さらに高感度化な液相微小空間測定を可能にし、液中単一分子、単一微粒子のカウンティングを実現した。鉛ポルフィリンベンゼン溶液では検出領域3フェムトリットル中にポルフィリン分子が平均0.5個存在する条件で信号を検出できた。また、銀コロイド溶液では、ブラウン運動に伴って、単一銀超微粒子(粒径数ナノメートル)が検出領域を通過する様子をとらえることに成功した。この熱レンズ顕微鏡による高感度検出技術を、ガラス基板上に微細流路を加工した化学集積回路に適用した。その結果、微小空間では溶媒抽出が振とうしなくても効率よく進行することを見いだした。また、ガラスチップ上に培養した脳神経細胞から逆行性神経伝達物質が放出される様子をその場計測することにも成功した。この成果の波及効果として、小型化された分析チップの開発研究が進展しつつある。
一方、数十フェムト秒〜数ピコ秒の時間分解能をもつ超高速時間分解光熱変換分光法を開発し、固体表面、固液界面、液相における光熱変換プロセスを高速時間分解計測する技術を確立した。白金/電解液界面において、励起パルス入射後の過渡的な反射率変化をモニターしたところ、塩化物イオン、過塩素酸イオンなど白金に強く吸着されるイオンを含む場合にのみ、20フェムト秒という極めて速い緩和成分が観測された。この速い成分は従来報告されている現象では説明できず、励起直後の非熱化電子(ボルツマン分布に従わない高エネルギー電子)が化学吸着種と相互作用することにより現れた成分であると考察した。この研究成果の波及効果として、固体表面の熱物性測定装置の実用化研究が進展している。

Report

(3 results)
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] 堤内玲子、北森武彦、小竹玉緒、澤田嗣郎ほか: "In-Vivo Determination of Ultratrace Amounts of Prostaglandin in Plasma by High Performance Liquid Chromatography/Laser-Induced Fluorometry-Ultrasensitive Laser Spectrometry under Severe Conditions" Analytical Chemistry. 69. 5006-5010 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 章真輝、露本伊佐男、北森武彦、澤田嗣郎ほか: "Monitoring of Molecular Collective Behavior at Liquid/Liquid Interface by a Time-Resolved Quasi-elastic Laser Scattering Method." Journal of Physical Chemistry A. 101. 4163-4166 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小竹玉緒、北森武彦、澤田嗣郎: "Pulsed UV Laser-Induced Stationary Capillary Vibration for Highly Sensitive and Direct Detection of Capillary Electrophoresis." Analytical Chemistry. 69. 2537-2540 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 伊東和喜、原田明、澤田嗣郎ほか: "Ultrafast lensing effect of β-carotene in n-hexane solution." Chemical Physics Letters. 275. 349-354 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 火原彰秀、原田明、澤田嗣郎: "Femtochemistry at Pt/aqueous solution interfaces as observed by transient reflectivity measurements" Chemical Physics Letters. 272. 1-5 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田中崇之、原田明、澤田嗣郎: "Sub-picosecond Surface-Restricted Carrier and Thermal Dynamics by Transient Reflectivity Measurements" Journal of Applied Physices. 82. 4033-4038

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤田嗣郎、北森武彦、原田明ほか: "光熱変換分光法とその応用" 学会出版センター, 265 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤田嗣郎ほか: "最新の分離・精製・検出法-原理から応用まで-" エヌ・ティー・エス, 230 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenji Katayama,Qing Shen,Akira Harata,Tsuguo Sawada: "Unusual Enhancement of Transient Reflecting Grating Signal Under a Plasmon Resonance Condition" Applied Physics Letters. 69. 2468-2470 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Takuya Shimosawa,Takehiko Kitamori,Akira Harata,Tsuguo Sawada: "Fuzzy Linear Regression Curves in Ultratrace Analysis and Analytical Interpretation." Analytical Science. 12. 385-391 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Takayuki Tanaka,Akira Harata,Tsuguo Sawada: "Imagings of Picosecond-Photoexcited Carriers and Enhanced Auger Recombination Rate by Transient Reflecting Grating Measurements." Japanese Journal of Applied Physics. 35. 3642-3647 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Qing Shen,Akira Harata,Tsuguo Sawada: "Theory of Transient Reflecting Grating (TRG) in Fluid/Matallic Thin Film/Substrate Systems for Thin Film Characterization and Electrochemical Investigation." Japanese Journal of Applied Physics. 35. 2339-2349 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Akira Harata,Qing Sheng,Tsuguo Sawada: "Hypersonic Investigation of Electrochemical Interfaces." Physica B. 219/220. 629-631 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kenji Katayama,Qing Shen,Akira Harata,Tsuguo Sawada: "GHz Ultrasonic Measurement Using a Transient Reflecting Grating Method Under a Surface Plasmon Resonance Condition." Proceedings of 3^<rd> Joint Meeting Acoustical Society of America and Acoustical Society Japan. 575-578 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hiroko Kimura,Shigetaka Matsuzawa,Chao-YiTu,Takehiko Kitamori,Tsuguo Sawada: "Ultrasensitive Heterogeneous Immunoassay Using Photothermal Deflection Spectroscopy 2.Quantitation of Ultratrace Carcinoembryonic Antigen in Human Sera." Analytical Chemistry. 68. 3063-3067 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Akira Harata,Akihide Hibara,Tsuguo Sawada: "Ultrafast Photothermal and Photoacoustic Measurement of Solid/Liquid Interfaces." Proceedings of 3^<rd> Joint Meeting Acoustical Society of America and Acoustical Society Japan. 579-580 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ryuichi Takamoto,Ryujiro Namba,Shinya Yamamoto,Tasuku Takamatsu,Masahiro Matsuoka,Tsuguo Sawada: "Percutaneous absorptiometry by a laser photoacoustic method and its applications (Accounts)" 分析化学. 45. 225-238 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 原田 明、澤田 嗣郎: "過渡反射格子法を用いた表面・界面計測と高速光熱変換分光法" ぶんせき. 45. 225-238 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Qing Shen,Akira Harata,Tsuguo Sawada: "Analysis of Thermal and Acoustic Properties of Ion-Implanted Diamond-Like-Carbon Films Using Transient Reflecting Grating Technique." Journal of Applied Physics. 77. 1488-1491 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ryuuichi Takamoto,Shinya Yamamoto,Ryujiro Namba,Masahiro Matsuoka,Tsuguo Sawada: "New Percutaneous Absorptiometry by Laser Photoacoustic Method Using an Open-Ended Cell." Analytical Chimica Acta. 299. 387-391 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Masaaki Harada,Masashi Shibata,Takahiro Kitamori,Tsuguo Sawada: "Application of Coaxial Beam Photothermal Microscopy to Analysis of a Single Biological Cell in Water." Analytical Chimica Acta. 299. 343-347 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Akira Harata,Takahiro Kawasaki,Masaki Ito,Tsuguo Sawada: "Study of Electrochemical Interfaces by Transient Reflecting Gratings.21GC04:Analytical Chimica Acta" 299. 349-354 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 原田 明,北森武彦,澤田嗣郎: "熱レンズ顕微鏡の開発と毛髪計測への応用" 色材. 68. 606-612 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 北森武彦,澤田嗣郎: "レーザー分光法による超微量生体成分の分析" フォルマシア. 31. 1138-1142 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Qing Shen,Akira Harata,Thuguo Sawada: "Theory of Transient Reflecting Grating(TRG)in Fluid/Metalic Thin Film/Substrate Systems for Thin Film Characterization and Electrochemical Investigation." Japanese Journal of Applied Physics. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Takura Shimosaka,Takehiko Kitamori,Akira Harata,Tsuguo Sawada: "Fuzzy Linear Regression Curves in Ultratrace Analysis and Analytical Interpretation." Analytical Science. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Takayuki Tanaka,Akira Harata,Tsuguo Sawada: "Imagings by Picosecond-Photoexcited Carriers in Transient Reflecting Grating Measurements and Analysis of Near Surface Auger Recombination Rate." Japanese Journal of Applied Physics. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Akira Harata,Qing Sheng,Tsuguo Sawada: "Hypersonic Investigation of Electrochemical Interfaces." Physica B. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2018-03-28  

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