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Electronic Properties of Nonpolar Liquids : Electron Mobility, Electron Reaction Rates, Conducting State Energy and Free-Electron Yields

Research Project

Project/Area Number 04405003
Research Category

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

Allocation TypeSingle-year Grants
Research Field 広領域
Research InstitutionKanagawa Institute of Technology (1994)
The University of Tokyo (1992-1993)

Principal Investigator

NISHIKAWA Masaru  Kanagawa Institute of Technology, Faculty of Engineering Professor, 工学部, 教授 (10012329)

Co-Investigator(Kenkyū-buntansha) ITOH Kengo  University of Tokyo, College of Arts and Sciences Assistant, 教養学部, 助手 (40221080)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥20,200,000 (Direct Cost: ¥20,200,000)
Fiscal Year 1994: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥16,200,000 (Direct Cost: ¥16,200,000)
KeywordsElectron mobility / Electron transport / Excess electron / Dielectric liquids / Free-electron yields / Electron attachment / Nonpolar liquids / Hydrocarbon liquids / 反応速度 / 電子物性 / 移動度 / 過剩電子
Research Abstract

1. (1) Electron mobilities were measured as a function of composition at different temperatures in binary mixtures : tetramethylsilane (TMS) -2,2-dimethylbutane (DMB), TMS-2,2,4,4-tetramethylpentane, TMS-neopentane. It is concluded that a model based on deformation potential theory involving concentration fluctuations can describe experimental results properly. However, fluctutation potentials arising from concentration fluctuations are found to be less efficient in scattering excess electrons than that due to density fluctuations.
(2) Measurements of electron mobilities in n-hexane (n-H) -DMB system indicated that up to 25% in n-H electrons are prevalently in quasifree state, and beyond 25% localized state gradually becomes dominant.
2. (1) Reaction rates of electrons with CO_2 in DMB and 2-methylbutane, and (2) with toluene in n-H and DMB increase with increasing pressure due to volume decrease by electrostriction.
3. Analysis of the electron attachment-detachment equilibrium with CO_2 in tetramethylsilane and dimethylbutane by means of thermodynamic cycles utilizing conducting state energies (V_0) in respective liquids yielded the value of electron affinity for CO_2,0.61 ev, which is in excellent agreement with a theoretical calculation (Armstrong et al., 1994) and an experimental value (Compton et al.1975)
4. Correlation between steady state current and electron mobility was observed when electrons were injected into liquid n-pentane, isooctane and TMS by illuminating NaK alloy with 300-400nm light..
5. Free-electron yields (G_<fi>) were measured as a function of pressure at different temperatures in TMS,isooctane and n-pentane, G_<fi>- (number of electrons per 100eV absorbed) are roughly constant with pressure in TMS,and in isooctane at low temperatures. The G_<fi> goes down with increasing pressure in isooctane at higher temperatures and in n-pentane.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 二宮史朗・伊藤健吾・西川 勝: "Electron drift mobilities in mixtures of 2,2-dimethylbutane and tetramethylsilane" Proceedings of International Conference on Liquid Radiation Detectors,ed.by T.Doke. 263-266 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 伊藤健吾・西川 勝・R.A.ホルロイド: "Electron attachment to toluene in -hexane and 2,2-dimethyl-butane at high pressure." Jounal of Physical Chemistry. 97. 503-507 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 西川 勝: "The conduction band energy of nonpolar liquids" Nuclear Instruments and Methods in Physics Research. A327. 3-6 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 二宮史朗・伊藤健吾・西川 勝・R.A.ホルロイド: "Effect of pressure on the equilibrium e^- + CO_2 【double half arrows】 CO_2^- in 2-methylbutane and 2,2-dimethylbutane" Jounal of Physical Chemistry. 97. 9488-9492 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Ninomiya, K.Itoh, M.Nishikawa: "Electron drift mobilities in mixtures of 2,2-dimethylbutane and tetramethylsilane" Proc.Int.Conf on Liq.Rad.Detectors, ed.T.Doke. 263-266 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Itoh, M.Nishikawa, R.Holroyd: "Electron attachment to toluene to toluene in n-hexane and 2,2-dimethylbutane at high pressure" Journal of Physical Chemistry. 97 (2). 503-507 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Nishikawa: "The conduction band energy of nonpolar liquids" Nuclear Instruments and Methods in Physics Resaerch. A327 (1). 3-6 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Ninomiya, K.Itoh, M.Nishikawa, R.Holroyd: "Effect of pressure on the equilibrium e^-+CO_2<double half arrows>CO_2 in 2-methylbutane and 2,2-dimethylbutane" Journal of Physical Chemistry. 97 (37). 9488-9492 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 伊藤・二宮・西川・ホルロイド: "Charge transport at high pressure in toluene-n-pentane mixtures" Journal of Physical Chemistry. 98. 1974-1977 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] ホルロイド・シュワ-ツ・ストラドウスカ・伊藤・二宮・西川: "The e^- + 1,3-butadiene 【double arrow】 1,3-butadiene^- equilibrium in n-hexane" Journal of Physical Chemistry. 98. 7142-7146 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 伊藤・西川・R.ホルロイド: "Electron attachment to toluene in n-hexane and 2,2-dimethylbutane at high pressure" Journal of Physical Chemistry. 97. 503-507 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 西川勝: "The conduction band energy of nonpolar liquids" Nuclear Instrum.and Methods in Phys.Res.A327. 3-6 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 二宮・伊藤・西川・ホルロイド: "Effect of pressure on the equilibrium e^-+CO_2(〕 SY.dblharw. 〔)CO_2^-in 2-methylbutane and 2,2-dimethylbutane" Journal of Physical Chemistry. 97. 9488-9492 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 伊藤・二宮・西川・ホルロイド: "Charge transport at high pressure in toluene-n-pentane mixtures" Journal of Physical Chemistry. (in press).

    • Related Report
      1993 Annual Research Report

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

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