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Development of new highly-sensitive gas sensor with nano-fiber metallic structure by He plasma processes

Research Project

Project/Area Number 18K18751
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 14:Plasma science and related fields
Research InstitutionOsaka University

Principal Investigator

Ueda Yoshio  大阪大学, 工学研究科, 教授 (30193816)

Co-Investigator(Kenkyū-buntansha) 伊庭野 健造  大阪大学, 工学研究科, 助教 (80647470)
Lee HeunTae  大阪大学, 工学研究科, 講師 (90643297)
Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsナノ繊維構造 / ヘリウムプラズマ / ガスセンサ / ガスセンサー
Outline of Final Research Achievements

We try to apply nano-fiber structure produced by He plasma irradiation to transition metals such as Mo and W to new types of gas sensors. Since nano-fiber structure has large surface area which enhances production of conduction electrons produced by surface reactions with environmental gases, this structure has a great potential for highly sensitive gas sensors.
In this study, tungsten nano-fiber structure produced by He plasma irradiation was oxidized in dry air. Then resistivity type sensors for H2 gas was fabricated. This sensor is able to detect 10 ppm H2 in air atmosphere with sufficient sensitivity. This sensitivity is almost equivalent to commercial highly sensitive H2 gas sensors. Therefore, we have developed new and promising gas sensing technique which can be applied for various gases.

Academic Significance and Societal Importance of the Research Achievements

金属へのHeプラズマ照射で形成されるナノ繊維構造を用いたガスセンサの開発は我々のグループが世界で初めて行ったものである。特にHeプラズマ照射によるナノ繊維構造は、他のナノ構造体(ナノロッド等)と比べて、3次元的に緻密で複雑な形状をしているため、大きな表面積を持っていること、抵抗測定において複雑な電流パスが期待できること、ナノ繊維層の最表面に電極の蒸着が可能であることなど、他のナノ構造では見られない利点を有している。本研究はこのナノ繊維構造の特徴を最大限に生かして、ガスセンサへの応用可能性を実証したという点において、大きな社会的意義を持つものである。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Ethanol gas sensing performance of high-dimensional fuzz metal oxide nanostructure2018

    • Author(s)
      Kenzo Ibano, Yoshihiro Kimura, Tohru Sugahara, Heun Tae Lee and Yoshio Ueda
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 4 Pages: 040316-040316

    • DOI

      10.7567/jjap.57.040316

    • NAID

      210000148810

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Systematic Study on Helium Induced Nanostructure Formation of 5th Period Transition Metals for Gas Sensor Application2019

    • Author(s)
      Kazuki Yuzawa, Kenya Uehata, Issei Hirai, Kenzo Ibano, Heun Tae Lee and Yoshio Ueda
    • Organizer
      2019 MRS Fall Meeting & Exhibit, December 1-6, 2019, Boston, MA, USA
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ヘリウム照射で合成された繊維状ナノ構造のガスセンサ特性2019

    • Author(s)
      伊庭野 健造, 上畑 憲矢, 平井 一生, 上田 良夫
    • Organizer
      応用物理学会  2019年秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Hydrogen gas sensing performance of high-dimensional tungsten oxide fuzz (He induced nanostructure)2018

    • Author(s)
      Y. Kimura, K. Ibano, K. Yuzawa, K. Uehata, H. T. Lee, Y. Ueda
    • Organizer
      71st Annual Gaseous Electronics Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] He誘起ナノ構造を用いたガスセンサの開発2018

    • Author(s)
      木村好博, 伊庭野健造, 湯澤一樹, 上畑憲矢, LEE Heun Tae, 上田良夫
    • Organizer
      第35回プラズマ・核融合学会年会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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