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Constructing a field-emission (FE) x-ray tube

Research Project

Project/Area Number 10450036
Research Category

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

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionNagoya Institute of Technology

Principal Investigator

OKUYAMA Fumio  Nagoya Institute of Technology, Graduate School of Engineering, Professor, 工学研究科, 教授 (30024235)

Co-Investigator(Kenkyū-buntansha) SUGIE Hiroshi  Nagoya Institute of Technology, Department of Engineering, Instructor, 工学部, 助手 (40024327)
TANEMURA Masaki  Nagoya Institute of Technology, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (30236715)
KITA Shigetomo  Nagoya Institute of Technology, Department of Engineering, Professor, 工学部, 教授 (60006153)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1998: ¥12,200,000 (Direct Cost: ¥12,200,000)
Keywordsnanomaterials / nanowires / field ion emission / carbon nanotubes / カーボンチューブ
Research Abstract

This project was aimed at establishing a technique to prepare carbon nanotubes (CNTs) having a metallic filament inside. The results obtained are outlined as follows.
1) Field anode growth (FAG)
Usually, FAG-grown CNTs are filled with a metallic matter, but some CNTs are completely filled with a Cr wire, lengthening up to 10-15 μm. In general, CNTs grown on field anodes undergo a straight growth from the substrate, with a few exceptions. Typical exceptional cases are ; "bridging" CNTs connecting the adjacent CNTs and "child" CNTs grown from the side face of thick CNTs.
2) Field cathode growth
This type of CNT growth needs Fe, Ni or Co as catalyst. The CNTs thus grown are always topped with a metallic nanocrystal, and are characterized by straight growth along electric field lines. The latter fact enables us to prepare the so-called "aligned CNTs, " which can serve as the field-electron source in an electron-beam tool. Recently, we successfully applied our aligned CNTs to the electron source of a compact x-ray tube, the result of which is to be published in the April-23 issue of Applied Physics Letters.
3) Newest research
In the last stage of this project, we noticed that, like Fe, Ni and Co, palladium (Pd) catalytically promotes the CNT growth on field anodes. This sort of CNTs are capped with Pd nanocrystals. The hydrogen-occlusion behavior of such Pd nanocrystals will be soon investigated at our laboratory.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 奥山文雄 他2名: "Formation of carbon nanotubes and their filling with metallic fibers onion-emitting field anodes"Journal of Applied Physics. 84. 1626-1631 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 奥山文雄 他2名: "Graphite synthesis catalyzed by chromium containing crystallites"Applied Physics Letters. 74. 3726-3729 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 奥山文雄 他3名: "Vapor grown atomic filaments of graphite"Applied Physics Letters. 76. 161-163 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 奥山文雄 他2名: "Modeling of the electron field emission from carbon nanotubes"Journal of Vacuum Science and Technology B. (印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 奥山文雄 他6名: "Carbon nanotubes as electron source in an x-ray tube"Applied Physics Letters. (印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] F.Okuyama, T.Hayashi and Y.Fujimoto: "Formation of carbon nanotubes and their filling with metallic fibers on ion-emitting field anodes"J.Appl.phys.. 84. 1626-1631 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] F.Okuyama, T.Hayashi and Y.Fujimoto: "Graphite synthesis catalyzed by chromium containing crystallites"Appl.Phys.Lett.. 74. 3726-3729 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] F.Okuyama, T.Hayashi, M.Kawasaki and K.Ibe: "Vapor grown atomic filaments of graphite"Appl.Phys.Lett.. 76. 161-163 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] V.Filip, D.Nicolaescu and F.Okuyama: "Modeling of the Electron Field Emission from Carbon Nanotubes"J.Vac.Sci.Technol.B. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Sugie, M.Tanemura, V.Filip, K.Iwata, T.Takahashi and F.Okuyama: "Carbon nanotubes as electron source in an x-ray tube"Appl.Phys.Lett.. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Tanemura, V.Filip, K.Iwata, Y.Fujimoto, F.Okuyama, D.Nicolaescu and H.Sugie: "Field electron emission from carbon nanotubes grown by plasma-enhanced chemical vapor deposition"J.Vac.Sci.Technol.B. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 奥山文雄 他3名: "Vapor-grown atomic filaments of graphite"Applied Physics Letters. 76,2. 161-163 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 奥山文雄 他2名: "Modeling of the electron field emission from carbon nanotubes"Journal of Vacuum Science and Technology B. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 奥山文雄 他6名: "Carbon nanotubes as electron source in an x-ray tube"Applied Physics Letters. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 奥山文雄、他2名: "Formation of carbon nanotubes and their filling with metallic fibers onion-emitting field anodes"Journal of Applied Physics. 84,3. 1626-1631 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 奥山文雄、他2名: "Graphite synthesis catalyzed by chromium containing crystallites"Applied Physics Letters. 74,24. 3726-3729 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 奥山文雄、他3名: "Vapor grown atomic filaments of graphite"Applied Physics Letters. 76,2. 161-163 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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