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Structure and Dynamics of Vapor-deposited Aqueous Solution Glasses

Research Project

Project/Area Number 13640382
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物性一般(含基礎論)
Research InstitutionOsaka University

Principal Investigator

YAMAMURO Osamu  Osaka University, Graduate School of Science, Assistant Professor, 大学院・理学研究科, 講師 (20200777)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsGlass / Aqueous solution / Low-energy excitation / Neutron scattering / Hydrogen bond / Hydrophobic hydration / 水 / 中距離密度揺らぎ / アニール効果
Research Abstract

In order to clarify the origin of the low energy excitation of glasses, which is one of the important problems in the physics of disordered systems, we have measured the neutron scattering and heat capacity of glassy water and several aqueous solution glasses. Two different types of solutes were taken for this study; one is well-solved solute CD_3OH and the other is less-solved solute Xe and SF_6. CD_3OH may have the effect destroying hydrogen-bond network, and Xe and SF_6 forming hydrogen-bond network through the hydrophobic hydration forming cage-like local structure. Both glasses were prepared by the low-temperature vapor-deposition technique which was developed by us.
At the beginning of the study, we have measured the neutron diffraction and small angle scattering of glassy water (solvent of the present systems) and SF_6 solution glass. Annealing the samples around 120 K, which is ca. 10 K lower than the glass transition temperature, reduced average mass density and density fluctuation around 0.1 Å^<-1>. Then we measured inelastic neutron scattering of the CD_3OH, Xe and SF_6 aqueous solution glasses with several concentrations. CD_3OH increased the intensity of the low-energy excitation while Xe and SF_6 reduced the intensity. These effects were enhanced by the increase of solute concentration. Annealing around 120 K also reduced the intensity of the low-energy excitation. By combining all of the present results, we have concluded that the origin of the low energy excitation of hydrogen-bonded network glasses is the nano-scale disorder and distortion due to partially broken hydrogen bonds.
At present, the above results have been published in five international journals, We had good response in all of the eight (four overseas and four domestic) international meetings where the present results were reported.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] O.Yamamuro: "Low-Energy Excitations of Vapor-Deposited Amorphous Ice and Its Annealing and Methanol-doping Effects Studied by Inelastic Neutron Scattering"J.Chem.Phys.. 115. 9808-9814 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Boson Peaks in Hydrogen-bonded Molecular Glasses"Physica B. 311. 84-89 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Madokoro: "Calorimetric and Neutron Scattering Studies on Boson Peak of Lithium Chloride Aqueous Solution Glasses"J.Chem.Phys.. 116. 5673-5679 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Inelastic Neutron Scattering and Low-energy Excitation of Amorphous SF_6-hydrate Prepared by Vapor-deposition Technique"Can.J.Phys.. 81. 107-114 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Neutron Diffraction and Thermal Studies of Amorphous CS_2 Realised by Low-temperature Vapour deposition"Europhys.Lett.. 63. 368-373 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Calorimetric and Neutron Scattering Studies of Plastically Crystalline Cyclooctanol"J.Phys. : Cond.Matter. 15. 5439-5450 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Low-Energy Excitations of Vapor-Deposited Amorphous Ice and Its Annealing and Methanol-doping Effects Studied by Inelastic Neutron Scattering"J.Chem.Phys.. 115. 9808-9814 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Boson Peaks in Hydrogen-bonded Molecular Glasses"Physica B. 311. 84-89 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Madokoro: "Calorimetric and Neutron Scattering Studies on Boson peak of Lithium Chloride Aqueous Solution Glasses"J.Chem.Phys.. 116. 5673-5679 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Inelastic Neutron Scattering and Low-energy Excitation of Amorphous SF_6-hydrate Prepared by Vapor-deposition"Can.J.Phys.. 81. 107-114 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Neutron Diffraction and Thermal Studies of Amorphous CS_2 Realized by Low-temperature Vapor-deposition"Europhys.Lett.. 63. 368-373 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Calorimetric and Neutron Scattering Studies of Plastically Crystalline Cyclooctanol"J.Phys.:Cond.Matter. 15. 5439-5450 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Yamamuro: "Inelastic Neutron Scattering and Low-energy Excitation of Amorphous SF6-hydrate Prepared by Vapor-deposition Technique"Canadian Journal of Physics. (印刷中).

    • Related Report
      2002 Annual Research Report
  • [Publications] O.Yamamuro: "The Simplest Molecular Glass CS2 Realised by Low-temperature Vapour-deposition Technique"Journal of Physics : Condensed Matter. (印刷中).

    • Related Report
      2002 Annual Research Report
  • [Publications] O.Yamamuro: "Low-Energy Excitations of Vapor-Deposited Amorphous Ice and Its Annealing and Methanol-doping Effects Studied by Inelastic Neutron Scattering"Journal of Chemical Physics. 115(21). 9808-9814 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] O.Yamamuro: "Boson Peaks in Hydrogen-bonded Molecular Glasses"Physica B. 311. 84-89 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Madokoro: "Calorimetric and Neutron Scattering Studies on the Boson Peak of Lithium Chloride Aqueous Solution Glasses"Journal of Chemical Physics. 116(13). 5673-5679 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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