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Study on the ultra low resistivity phenomenon of hetero structure organic thin films

Research Project

Project/Area Number 05452182
Research Category

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

Allocation TypeSingle-year Grants
Research Field Electronic materials/Electric materials
Research InstitutionTohoku University

Principal Investigator

YAMASHITA Tsutomu  Tohoku Univversity Professor, 電気通信研究所, 教授 (30006259)

Co-Investigator(Kenkyū-buntansha) OSHIMA Shigetoshi  Yamagata Univversity Professor, 工学部, 教授 (40124557)
NAKAJIMA Kensuke  Tohoku Univversity Associate Professor, 電気通信研究所, 助教授 (70198084)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1994: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥5,000,000 (Direct Cost: ¥5,000,000)
KeywordsLB films / Ultra low resistivity / Organic superconductor / Conductive organic thin films / 有機単分子膜 / ヘテロ構造 / TCNQ / アラキジン酸カドミウム / ステアリル・アミン
Research Abstract

Preparation and the electric properties of hetero structure LB films has been investigated with a view to inspect the ultra low resistivity phenomenon in the films. The ultra low resistivity has never seen in the hetero LB films of arachidic Cd (AA)/C_<15> TCNQ (TCNQ) for which Hino reported the ultra low resistivity. It has been said that the spontaneous electric field of a Z type TCNQ LB films and an electron cloud produced at the AA/TCNQ hetero interface play a important role to occur this phenomenon. Additionally, in this study, we have found that a part of TCNQ formed Cd-TCNQ complex with Cd^<2+> in a sub-phase solution and the complex could be changed to a conductive charge transfer (CT) complex. It was postulated that a two dimensional conducting layr had been formed at the interface of the non-polar AA and the polar TCNQ LB films by the Cd-TCNQ CT complex. The postulation implied us that the ultra low resistivity was probably resulted from the hetero structure of dielectric/2 d … More imensional conductor/dielectric on which the Ginzburg's theory of high temperature superconductivity based. In this study, we prepared conductive, polar and non-polar thin films by the LB method to realize the hetero structure and estimated film qualities and properties. Among these films, Y type arachidic Cd LB films has a sufficient films quality as the non-polar film. For conductive films, the LB films with a sufficiently high conductivity (1- S/cm) were successfully formed by use of a CT complex of BEDT-TTF (BO) and C_<15> TCNQ.For polar films, alternately deposited Y type films were fabricated instead of a labile Z type TCNQ LB films. It was found that the alternately deposited films have a sufficient quality and spontaneous electric potential of about 1.8 V for a 7 layrs film. The electric properties of the LB films with non-polar/conductive/polar hetero structure consisting of above LB films attract our attention from the application view point of new molecular devices as well as the ultra low resistivity phenomenon. Less

Report

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

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 西田直樹、他: "ヘテロLB膜の作製とその電気特性" 電気学会論文誌. 114-A. 40-46 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Naoki Nishida et al.: "Preparation and electric properties of hetero LB films" Trans. IEE of Jpn.114-A-1. 40-46 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 西田直樹: "ヘテロLB膜の作製とその電気特性" 電気学会論文誌. 114-A. 40-46 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 西田直樹: "ヘテロLB膜の作製とその電気特性" 電気学会論文誌A. 114-A. 40-46 (1994)

    • Related Report
      1993 Annual Research Report

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

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