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Electron Microscopic Study of Heat-Treated Carbon Nanotubes

Research Project

Project/Area Number 07455014
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionMeijo University

Principal Investigator

ANDO Yoshinori  Faculty of Science & Technology Meijo University, Professor, 理工学部, 教授 (30076591)

Co-Investigator(Kenkyū-buntansha) OHKOHCHI Masato  Faculty of Science & Technology Meijo University, Lecturer, 理工学部, 講師 (50076626)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥7,300,000 (Direct Cost: ¥7,300,000)
Keywordscarbon nanotubes / heat-treatment / analytical electron microscope / infrared radiation heating / thermal purification / フラーレン / アーク放電 / 酸化タングステン
Research Abstract

When carbon nanotrubes were heat-treated under intermediate vacuum (-10^<-4>Torr) at about 250゚C by using tungusten heater, all over the surface of carbon nanotubes are coated in complex morphology. It seems like regrowth of carbon nanotubes. The existence of elements, W and O,was confirmed by energy dispersive analytical electron microscope. The reason is that by heating of tungusten heater under low vacuum volatile tungusten oxide was made and it was evaporated to coat the surface of carbon nanotubes. Similar morphology of carbon nanotubes like regrowth was observed in cases of no heat-treating, namely at high arc current or at high pressure of atmospheric gas.
Recently, we found that thin and long high quality carbon nanotubes were made by arc discharge evaporation in hydrogen gas. Then, the part of co-existing carbon nanoparticles is also very low and very desirable specimens. if we heat-irra diated the specimens by infrared radiation heating system in air at 500゚C for 30 minutes, we could easily removed the co-existing carbon nanoparticles. Namely, thermal purification of carbon nanotubes was realized. Moreover, if the first evaporation by arc discharge for lmin is stable, the orientation of carbon nanotubes is aligned to the parallel direction of electric field. As the result, a bulk of purified carbon nanotubes of 1mm^3 in volume could be obtained. This quantity is fairly much in the order compared with the previous purfication of carbon nanotubes. Therefore, these purified carbon nanotubes are expected in the measurement of physical properties and in practical application.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] X.Zhao: "Morphology of Carbon Nanotubes Prepared by Carbon Arc" Jpn.J.Appl.Phys.35. 4451-4456 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Ohkohchi: "Metallic Oxide Catalyzed Growth of Carbon Nanotubes" Fullerene Sci.Tech.4. 977-988 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Wang: "Carbon Nanotubes Grown on the Surface of Cathode Deposit by Arc Discharge" Fullerene Sci.Tech.4. 1027-1039 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Ando: "Regrowth of Carbon Nanotubes and Nanoparticles" J.Cryst.Growth. 166. 888-892 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Ando: "Rroduction of Petal-like Graphite Sheets by Hydrogen Arc Discharge" Carbon. 35. 153-158 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] X.Zhao: "Preparation of High-Grade Carbon Nanotubes by Hydrogen Arc Discharge" Carbon. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yoshinori Ando: "A CARBYNE OBSERVED IN A MARKETING MICROGRID" Carbon. 33. 171-175 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yoshinori Ando and Masato Ohkohchi: "ELECTRON MICROSCOPIC STUDY OF HEAT-TREATED CARBON NANOTUBES" Fullerene Science & Technology. 3. 359-367 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] X.Zhao, M.Wang, M.Ohkohchi and Y.Ando: ""Morphology of Carbon Nanotubes Prepared by Carbon Arc"" Jpn.J.Appl.Phys.35. 4451-4456 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Ohkohchi, X.Zhao, M.Wang and Y.Ando: ""Metallic Oxide Catalyzed Growth of Carbon Nanotubes"" Fullerene Sci.Tech.4. 977-988 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Wang, X.Zhao, M.Ohkohchi and Y.Ando: ""Carbon Nanotubes Grown on the Surface of Cathode Deposit by Arc Discharge"" Fullerene Sci.Tech.4. 1027-1039 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Ando, M.Ohkohchi and M.Wang: ""Regrowth of Carbon Nanotubes and Nanoparticles"" J.Cryst.Growth. 166. 888-892 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Ando, X.Zhao and M.Ohkohchi: ""Production of Petal-like Graphite Sheets by Hydrogen Arc Discharge"" Carbon. 35. 153-158 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] X.Zhao, M.Ohkohchi, M.Wang, S.Iijima, T.Ichihashi and Y.Ando: ""Preparation of High-Grade Carbon Nanotubes by Hydrogen Arc Discharge"" Carbon. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] X.Zhao: "Morphology of Carbon Nanotubes Prepared by Carbon Arc" Jpn. J. APPL. Phys.35. 4451-4456 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Ohkohchi: "Metallic Oxide Catalyzed Growth of Carbon Nanotubes" Fullerene Sci. Tech.4. 977-988 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Wang: "Carbon Nanotubes Grown on the Surface of Cathode Deposit by Arc Discharge" Fullerene Sci. Tech.4. 1027-1039 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Ando: "Regrowth of Carbon Nanotubes and Nanoparticles" J.Cryst. Growth. 166. 888-892 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Ando: "Production of Petal-like Graphite Sheets by Hydrogen Arc Discharge" Carbon. 35. 153-158 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] X.Zhao: "Preparation of High-Grade Carbon Nanotubes by Hydrogen Arc Discharge" Carbon. (in press).

    • Related Report
      1996 Annual Research Report
  • [Publications] Yoshinori Ando: "A CARBYNE OBSERVED IN A MARKETING MICROGRID" Carbon. 33. 171-175 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y. Ando and M. Ohkohchi: "Electron Microscopic Study of Heat-Treated Carbon Nanotubes" Fullerene Science & Technology. 3. 359-367 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y. Ando, M. Ohkohchi, M. Wang: "Regrowth of Carbon Nonotubes and Nanoparticles" J. Crystal Growth,. (in printing). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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