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Molecular orientation and electronic properties of oriented organic thin films by means of low-energy electron transmission.

Research Project

Project/Area Number 63550005
Research Category

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

Allocation TypeSingle-year Grants
Research Field Applied materials
Research InstitutionChiba University

Principal Investigator

UENO Nobuo  Chiba University, Department of Image Science and Technology, Lecturer, 工学部, 講師 (40111413)

Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordshot electron / oriented thin film / electron affinity / energy band / electron transmission / electron scattering / LB膜 / 薄膜 / 配向薄 / 伝導帯 / 分子デバイス / 有機分子
Research Abstract

We investigated the correlation between the molecular orientation and the electron- transport properties for thin films of long alkyl molecules, Langmuir-Blodgett (LB) films of cadmium arachidate, LB films of polydiacetylene, evaporated films of tetratetracontane and thin films of related molecules, with low-energy electron transmission (LEET) technique. LEET spectra were measured as a function of film thickness, crystallinity, temperature and time after the film deposition.
We found that (i) degree of normal molecular orientation depends on the film thickness and the orientation becomes better for the thickness larger than 4 molecular layers, (ii) a poor orientation for thinner films, 2 molecular layers, is a results of poor crystallinity, (iii) the bottom of the conduction band is located at 0.4-0.5 ev above the vacuum level and the energy position shifts to low energy side by heating due to thermal excitation of molecular vibrations, (iii) the effective efficiency of the hot- electron injection into the film is larger at low temperature, and (iv) the electron transmission through the band gap can not explained by the tunnel theory.
Further, angle-resolved photoemission experiments were performed with synchrotron radiation for oriented thin films of 18-pentatriacontanone (stearone). The normal molecular orientation and energy band dispersion were observed simultaneously with this method.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] N.Ueno et al.: "Energy band dispersion in oriented thin films of penta triacontan18-one by angle resolved photoemission with synchrotron radiation." Phys.Rev.B. 41. 1176-1183 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Ueno et al.: "Angle-resolved photoemission from oriented thin films of long alkyl molecules:Valence band dispersion." Physica Scripta. 41. 181-184 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Ueno et al.: "Electron affinity and structure of Langmuir-Blodgett films of cadmium arachidate by means of low-energy electron transmission." Thin Solid Films. 179. 161-170 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Maeda et al.: "Low energy electron transmission measurements on polydiacetylene Langmuir-Blodgett films." Thin Solid Films. 179. 327-334 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] K.Sugita and N.Ueno: "Sensitivity enhancement of α-methylstyrene copolymer electron beam resists by force development." Polymer. 30. 1308-1313 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Ueno et al.: "Mechanism of UV-and VUV-induced etching of poly(methyl-methacrylate):Evidence for an energy dependent reaction." in Polymers in Microlithography,Material and Processes,(ACS Symp.Ser.Vol.). 412. 424-436 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N. UENO et al.: "Energy-band dispersion in oriented thin films of pentatriacontan-18-one by angle resolved photoemission with synchrotron radiation." Phys. Rev. B41-2, 1176-1183 (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N. UENO et al.: "Angle-resolved photoemission from oriented thin films of long alkyl molecules: Valence band dispersion." Physica Scripta 41 181-184 (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N. UENO et al.: "Electron affinity and structure of Langmuir-Blodgett films of cadmium arachidate by means of low-energy electron transmission." Thin Solid Films 179 161-170 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T. MAEDA et al.: "Low energy electron transmission measurements on polydiacetylene Langmuir-Blodgett films." Thin Solid Films 179 327-334 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] K. SUGITA and N. UENO: "Sensitivity enhancement of alpha-methylstyrene copolymer electron beam resists by force development." Polymer 30 July 1308-1313 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N. UENO et al.: "Mechanism of UV- and VUV-induced etching of poly(methylmethacrylate): Evidence for an energy dependent reaction." in Polymers in Microlithography, Materials and Processes, (ACS Symp. Ser. Vol.412), Eds. E. Reichmanis et al., Chap. 26.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.UENO et al.: "Energy band dispersion in oriented thin films of penta triacontan18-one by angle resolved photoemission with synchrotron radiation." Phys.Rev.B. 41. 1176-1183 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] N.UENO et al.: "Angle-resolved photoemission from oriented thin films of long alkyl molecules:Valence band dispersion." Physica Scripta. 41. 181-184 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] N.UENO et al.: "Electron affinity and structure of Langmuir-Blodgett films of cadmium arachidate by means of low-energy electron transmission." Thin Solid Films. 179. 161-170 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.MAEDA et al.: "Low energy electron transmission measurements on polydiacetylene Langmuir-Blodgett films." Thin Solid Films. 179. 327-334 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] K.SUGITA and N.UENO: "Sensitivity enhancement of α-methylstyrene copolymer electron beam resists by force development." Polymer. 30. 1308-1313 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] N.UENO et al.: "Mechanism of UV-and VUV-induced etching of poly(methyl-methacrylate):Evidence for an energy dependent reaction." in Polymers in Microlithography,Materials and Processes,(ACS Symp.Ser.Vol.). 412. 424-436 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 上野信雄、関和彦、藤本斉、佐藤直樹、中原弘雄、杉田和之、井口洋夫: 信学技報OME88. 88-1. 1-6 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] N.Ueno;K.Seki;N.Sato;H.Fujimoto;T.Kuramochi;K.Sugita;H.Inokuchi: in preparation for publication.

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Maeda;N.Ueno;K.Sugita;K.Miyano: to be published in Thin Solid Films.

    • Related Report
      1988 Annual Research Report
  • [Publications] N.Ueno;H.Nakahara;K.Sugita;K.Fukuda: to be published in Thin Solid Films.

    • Related Report
      1988 Annual Research Report
  • [Publications] N.Ueno;T.Mitsuhata;K.Sugita;K.Tanaka: Jpn.J.Appl.Phys.27. 1723-1726 (1988)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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