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INVESTIGATION ON ELECTROCHEMICAL DEPOSITION OF THIN FILMS OF MOLECULAR SUPERCONDUCTORS AND CHARACTERIZATION THEREOF

Research Project

Project/Area Number 04650004
Research Category

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

Allocation TypeSingle-year Grants
Research Field 代数学・幾何学
Research InstitutionYAMAGATA UNIVERSITY

Principal Investigator

AWANO Hiroshi  ASSISTANT PROFESSOR, FUCULTY OF ENGINEERING, YAMAGATA UNIVERSITY, 工学部, 助手 (20202773)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
KeywordsMOLECULAR CRYSTAL / SUPERCONDUCTOR / THIN FILM / ELECTROCHEMISTRY / ELECTRODEPOSITION / ION RADICAL SALT / BEDT-TTF
Research Abstract

The purpose of the present work is to obtain thin films of molecular superconductors, represented by k-(BEDT-TTF)_2Cu(NCS)_2 salt, by an electrochemical method. For fundamental knowledge, in addition, mechanisms of electrodepositionof some ion radial salts are tried to clarify.
Electrodeposition of (BEDT-TTF)_2Cu(NCS)_2 salt has been attempted. Althrough a film containing k-type crystals can be easily obtained, it was too difficult to obtain a good film in which k-type crystals were densely packed and highly oriented. Morphology of the films strongly dependson both the current density and the special arrangement of the electrodes.
In order to clarify the nucleation and growth processes in electrodeposition of (BEDT-TTF)_2Cu(NCS)_2 films, in situ microscopic images were observed and recorded with a video recording system. FOr optical observation, a homogeneous solution (BEDT-TTF/CuSCN/KSCN/18-crown-6/1, 1, 2-trichloroethane) was used instead of heterogeneous suspension, which had been used for the lelectrodeposition. When a high potential, 3.0 V vs. Ag, was applied for short period, followed by applying 2.0 V, the nucleation density was enhanged : innumerable small, invisible nuclei were generated. But some of the nuclie began and continued to grow, taking other surrounding nuclei. This is an example of "Ostwald ripening".
In order to accumulate knowledge of electrodeposition and properties of ion radical salts to establish "science of electrocrystallization of molecular compounds", the following compounds were investigated : (1) the physical properties of ion radical salts of aromatic diamines, (2) a new, electrochemical method to prepare quinhydrone crystal.

Report

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

    (11 results)

All Other

All Publications (11 results)

  • [Publications] H.Awano et al.: "Thin films of(BEDT-TTF)_2Cu(NCS)_2 prepared by an electrodeposition method." Jpn.J.Appl.Phys.31. 1899-1900 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "ESR study of dynamics of the phase transition in Wurster's blue perchlorate." Synth.Met.55. 685-689 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Electrocrystallization of quinhydrone." Bull.Chem.Soc.Jpn.67(印刷中). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "In situ microscopic observation of nucleation and growth processes in electrodeposition of(BEDT-TTF)_2Cu(NCS)_2 thin films from a homogeneous Solution." Synth.Met.(投稿予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Dimerization of the radical cation of 3,3',5,5'-tetramethylbenzidine." Bull.Chem.Soc.Jpn.(投稿予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Thin films of (BEDT-TIF)_2Cu(NCS)_2 prepared by an electrodeposition method" Jpn. J.Appl. Phys.31. 1899-1900 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "ESR study of dynamics of the phase transition in Wurster's blue perchlorate." Synth. Met.55. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Electrocrystallization of quinhydrone" Bull. Chem. Soc. Jpn.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "In situ microscopic observation of nucleation and growth processes in electrodeposition of (BEDT-TIF)_2Cu(NCS)_2 thin film from a homogeneoussolution" Synth.Met.(to be submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Dimerization of the radical cation of 3,3', 5,5'-tetramethylbenzidine" Bull. Chem. Soc. Jpn.(to be submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Awano et al.: "Electrocrystallization of Quinhydrone." Bulletin of the Chemical Society of Japan. 67(印刷中). (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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