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Fabrication and practical application of metallo-phthalocyanine thin film-based NO_2 gas sensor

Research Project

Project/Area Number 12650343
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 電子デバイス・機器工学
Research InstitutionShizuoka University

Principal Investigator

MURAKAM Kenji  Shizuoka University, Research Institute of Electronics, Associate Professor, 電子工学研究所, 助教授 (30182091)

Co-Investigator(Kenkyū-buntansha) WATANABE Kenzo  Shizuoka University, Research Institute of Electronics, Professor, 電子工学研究所, 教授 (70022142)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2000: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsNO_2 gas sensors / organic thin film / fluoroaluminmu phthalocyanine (AlFPc) / substituted metallo-phthalocyanine / gas response characteristics / vacuum sublimation method / asymmetric side chain / molecular orientation / NO2ガスセンサ / 分子線源 / 銅フタロシアニン / NO_2ガス / 薄膜微構造 / センサ特性 / アルミニウムフタロシアニン / ガス吸着
Research Abstract

Copper phthalocyanine thin films with the thickness of 200 nm have shown good gas response characteristics in the NO_2 ambience at the operation temperature of 150 ℃, after the HF treatment of glass substrates. However, there are still some problems from the viewpoint of practical uses. Fabrication of very thin film is one of the methods to solve them. Reduction in the thickness of film is expected to lead a faster gas response and improved recovery characteristics. At the same time, reduction in the gas sensitivity may be caused. Fluoroaluminum phthalocyanine (AlFPc) molecules have a linear backbone (Al-F)_x surrounded by a stack of planar Pc rings, which may result in a high conductive very thin film.
The AlFPc films with the thickness of 10 to 20 nm have been deposited on the non-treated glass substrate by using a vacuum sublimation method in the vacuum of 10^<-4> Pa range. The films have revealed an enough electric conductivity for the use of practical gas sensor element as expected … More . The gas response characteristics for the cycle of doping and dedoping of 1 ppm NO_2 gas have also showed the high gas sensitivity, the faster response rate and the good recovery characteristics even at the operation temperature of 80 ℃. These results can be interpreted by the specific array of the AlFPc molecules in the film and the decrease in diffusion of NO_2 gas molecules into the film. As a result, the very thin film based on AlFPc molecules is a promising material for the practical application to thin film-based NO_2 gas element.
In order to fabricate a more highly oriented very thin film, substituted AlFPc molecules, fluoroaluminum tetra-t-butyl-phthalocyanine (AlFPc(C_4/H_9)_4) and fluoroaluminum octa-methyl-phthalocyanine (AlFPc(CH_3)_8) have been synthesized. Since both molecules have been substituted by the asymmetric groups, they may cause more specific arrays in the vacuum sublimed thin films. Furthermore, the substituted groups may improve the gas response characteristics due to their electron-donating effect on the AlFPc macrocycles. Indeed, the vacuum sublimed very thin films based on both substituted AlPcF molecules have shown the improved NO_2 gas response characteristics. The results also suggest that the substitution of AlFPc molecules is another approach to realize the practical thin film-based NO_2 gas sensors. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 向 前: "Effects of pre-doping and post-anncaling on fluoroaluminum phthalocyainc thin films for NO2 gas sensing"Chemical Sensors. 17・Suppl.B. 43-45 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 向 前: "Synthesis of substituted fluoroaluminum phthalocyanines for thin film-based NO2 gas sensors"静岡大学大学院電子科学研究科研究報告. 23. 23-27 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] X. Qian, K. Hirayama, K. Murakami, K. Watanabe: "Effects of Pre-doping and Post-annealing on Fluoroaluminum Phthalocyanine Thin Films for NO_2 Gas Sensing"Chemical Sensors. 17 Suppl. B. 43-45 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Q. Xiang, K. Murakami, K. Watanabe: "Synthesis of Substtuted Phrhalocyanine Derivatives for Thin Film-Based NO_2 Gas Sensor"Reports of Graduate School of Electronic Science and Technology, Shizuoka University. 23. 23-27 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 向 前: "Effects of pre-doping and post-annealing on fluoroaluminum phthalocyaine thin films for NO2 gas sensing"Chemical Sensors. 17・Suppl.B. 43-45 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 向 前: "Synthesis of substituted fluoroaluminum phthalocyanines for thin film-based NO2 gas sensors"静岡大学大学院電子科学研究科研究報告. 23. (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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