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Study on electron and energy transfer in highly organezed aggregates by quantum beams

Research Project

Project/Area Number 04453164
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionThe University of Tokyo

Principal Investigator

ISHIGURE Kenkichi  University of Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (90010975)

Co-Investigator(Kenkyū-buntansha) ASAI Keisuke  University of Tokyo, Faculty of Engineering, Research Associate, 工学部, 助手 (60231859)
HIROISHI Daisuke  University of Tokyo, Faculty of Engineering, Research Associate, 工学部, 助手 (20199110)
KATSUMURA Yosuke  University of Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (70111466)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1993: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1992: ¥5,900,000 (Direct Cost: ¥5,900,000)
KeywordsLB membranes / Cyanin dyes / Dioctadecyl-dithiocarbamate / GaAs / Radiolysis / Fluorescence microscope / J-aggregates / XPS / 放射線 / エネルギー移動 / パルスラジオリシス
Research Abstract

Langmuir Blodgett films of cyanin dye and arachiadic acid on the substrates or quarts were found to decompose very little by irradiation of UV and visible light, but to decompose markedly with gama radiation and electron beams in the atmosphere of Ar to yield very large G values. This large G value was considered to arize from the energy transfer from the substrate to the LB layrs, but was finally attributed to the attack of the radiolysis species of Ar in the gas phase. Gamma radiolysis and pulse radiolysis experiments of the cyanin dye solutions revealed that the major contribution to the decomposition of the dye comes from the Ar^+ ion species.
Observation of the LB membranes with fluorescence microscope showed that the decomposition of the J aggregates of the dyes induced by radiation is largely affected by the domain structures of the J aggregates in the dye membranes, and the highly developped domains of the J agregates was found from the observation of the LB films to have highly … More ordered structure of the dye molecules and it was inferred that electron and energy transfers between the highly ordered and the less ordered molecules or the monomers of the dyes are deeply related to the decomposition reactions of the dyes.
On the other hand, the LB membranes of the arachiadic acid on the substrates of silicon were prepared and their XPS spectra showed that the strong chemical interactions exist between the arachiadic acid molecules and the silicon atoms on the surface of the substrates. Based on this experimental results, the thin membranes of dioctadecyl-dithiocarbamate (DOTC) on the substrate of GaAs were prepared using electrochemical deposition method to cheek the possibility of stabilizing the dangling bonds of the GaAs surfaces with the sulfur atoms in the DOTC layrs that become stable and thin isulator. The XPS spectra of the membranes showed that chemical bonds are formed between the sufur atoms in DOTC and the As atoms in the surface of GaAs, and the density of the surface states of the samples was found from their photoluminescence spectra to be reduced markedly with this treatment. Less

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 浅井圭介,石榑顕吉他: "An application of electorolytic deposition for the electronic passivation of GaAs surface through the formation of the films" Surface Science. 1-5 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 浅井圭介,石榑顕吉他: "電解析出法を用いた有機薄膜形成によるGaAs表面の安定化" 第46回コロイド界面化学討論会要旨集. 46. 16-17 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 浅井圭介,広石大介,石榑顕吉他: "シアニン色素LB膜系の放射線化学" 第46回コロイド界面化学討論会要旨集. 46. 408-409 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 浅井圭介,石榑顕吉: "有機薄膜形成による表面電子状態制御の試み" 日本化学会第66秋季年会予稿集. 66. 72-72 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 広石大介,浅井圭介,石榑顕吉他: "シアニン色素水溶液の放射線化学" 放射線化学討論会講演要旨集. 35. 181-182 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石榑顕吉,広石大介,浅井圭介: "シアニン色素LB膜系の放射線化学" 東大原子力研究総合センター年報. 20. 74-74 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Keisuke Asai, Kenkichi Ishigure et al: "An application of electrolytic deposition for the electronic passivation of GaAs surface through the formation of the films" Surface Science. (in print). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Keisuke Asai, Kenkichi Ishigure et al: "Stabilization of GaAs surface thuough the formation of thin organic layrs by electrolytic deposition" Proceedings of the 46th Discussion Meeting on Colloids and Surface Chemistry. 46. 16-17 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Keisuke Asai, Daisuke Hiroishi, Kenkichi Ishigure et al: "Radiation chemistry of cyanin dye LB membrane system" ibid(Proceedings of the 46th Discussion Meeting on Colloids and Surface Chemistry). 46. 408-409 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Keisuke Asai, Kenkichi Ishigure: "A trial to control the surface electronic states through the formation of thin organic films" Abstracts of the 66th annual fall meeting of chemical society of Japan. 66. 72 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Daisuke Hiroishi, Keisuke Asai, Kenkichi Ishigure: Proceedings of Discussion Meeting on Radeation, Chemistry. 35. 181-182 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Kenkichi Ishigure, Daisuke Hiroishi, Keisuke Asai et al: Annual report of Research Center of Nuclear Science and Technology of University of Tokyo. 20. 74 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 浅井圭介、石榑顕吉他: "An application of electrolytic deposition for the electronic passivation of GaAs surface the formation of thin organic films" Surface Science. 1-5 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 浅井圭介、石榑顕吉他: "電解析出法を用いた有機薄膜形成によるGaAs表面の安定化" 第46回コロイド界面化学討論会要旨集. 46. 16-17 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 浅井圭介、石榑顕吉他: "有機薄膜形成による表面電子状態制御の試み" 日本化学会第66秋季年会予稿集. 72-72 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 浅井圭介、広石大介、石榑顕吉他: "シアニン色素LB膜系の放射線化学" 第46回コロイド界面化学討論会要旨集. 46. 408-409 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石榑顕吉、勝村庸介他: "シアニン色素LB膜系の放射線化学" 東大工学部原子力工学研究施設共同利用成果報告書. 80-81 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石榑顕吉、広石大介、浅井圭介他: "シアニン色素LB膜系の放射線化学" 東大原子力総合センター年報. 20. 74 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 浅井 圭介、広石 大介 石榑 顕吉 他: "The effects of Gamma lrradiation on Chromophor Aggregation in Monolayer Assemblies" Radiation Research. 1. 297 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 佐藤 登志久、広石 大介、石榑 顕吉 他: "シアニン色素LB膜系の放射線化学" コロイド及び界面化学討論会講演要旨集. 44. 432-433 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 広石 大介、浅井 圭介 石榑 顕吉 他: "シアニン色素系からのガラス表面への吸着" コロイド及び界面化学討論会講演要旨集. 44. 510-511 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 広石 大介、石榑 顕吉 他: "シアニン色素水溶液の放射線化学" 放射線化化学討論会講演要旨集. 35. 181-182 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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