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1998 Fiscal Year Final Research Report Summary

Growth Mechnism of Carbon Nanotubes

Research Project

Project/Area Number 09450013
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  Meijo Univ., Fac.of Science & Tech., Prof., 理工学部, 教授 (30076591)

Co-Investigator(Kenkyū-buntansha) OHKOHCHI Masato  Meijo Univ., Fac.of Science & Tech., Assist.Prof., 理工学部, 助教授 (50076626)
OKAZAKI Tsugio  Meijo Univ., Fac.of Science & Tech., Assist.Prof., 理工学部, 助教授 (60076619)
Project Period (FY) 1997 – 1998
Keywordsmultiwalled carbon nanotubes / arc discharge in hydrogen gas / purification by heating in air / morphology / scanning electron microscopy / transmission electron microscopy / optical spectroscopy / analysis of gas composition
Research Abstract

We made clear that multiwalled carbon nanotubes could be prepared by DC arc evaporation of graphite rods in atmospheric gas as cathode deposit, after 1991. When we changed the kind of atmospheric gas, different kinds of morphology could be observed by scanning electron microscopy or transmission electron microscopy. When we used pure hydrogen gas as atmospheric gas, high, quality multiwalled carbon nanotubes with less co-existing carbon nanoparticles could be obtained (1997). Thus, if co-existing carbon nanoparticles were less originally, it is easy to remove co-existing carbon nanoparticles and to purify. In fact, we could get purified maltiwalled carbon nanotubes by simple physical method, namely by irradiating the specimen in air (1998) by infrared radiation heater at 500゚C for 30min.
When we evaporated the graphite electrode in pure hydrogen gas, we could get maltiwalled carbon nanotubes having extremely narrow inner tube of the diameter 1.0nm in the order. The inner tube was surrounded by graphene sheets of equal distance, 0.34nm, and with high crystalline. In order to clarify the reason why pure hydrogen gas is appropriate for production of high quality multiwalled carbon nanotubes, we analyzed the optical emission of arc discharge. As the result, the existence of much H atoms and CH molecules in atmospheric gas including H atoms, such as H2 or CH4. Especially, it seems that the existence of CH molecules affects strongly for the growth of edge of graphene sheets. However, the CH molecules can not be found by a composite analysis of gas after cooling.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Y.Ando: "“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(和文)」より
  • [Publications] X.Zhao: "“Preparation of High-Grade Carbon Nanotubes by Hydrogen Arc Discharge"" Carbon. 35. 775-781 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Ando: "“Sponge of Purified Carbon Nanotubes"" Jpn.J.Appl.Phys.37. L61-L63 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Sharon: "“Spongy carbon nanobeads-A new material"" Carbon. 36. 507-511 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] X.Zhao: "“Raman Spectra and X-Ray Diffraction Patterns of Carbon Nanotubes"" Jpn.J.Appl.Phys.37. 4846-4849 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Bandow: "“Purification and magnetic properties of carbon nanotubes"" Appl.Phys.A67. 23-27 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [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
  • [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. 35. 775-781 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Ando, X.Zhao and M.Ohkohchi: ""Sponge of Purified Carbon Nanotubes"" Jpn.J.Appl.Phys.37. L61-L63 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Sharon, K.Mukhopadhyay, K.Yase, S.Iijima, Y.Ando and X.Zhao: ""Spongy Carbon Nanobeads---A New Material"" Carbon. 36, No.5-6. 507-511 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Bandow, S.Asaka, X.Zhao and Y.Ando: ""Purification and magnetic properties of carbon nanotubes"" Appl.Phys. A67. 23-27 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] X.Zhao and Y.Ando: ""Raman Spectra and X-Ray Diffraction Patterns of Carbon Nanotubes Prepared by Hydrogen Arc Discharge"" Jpn.J.Appl.Phys. 37. 4846-4849 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Sharon, M.Kumar, P.D.Kichambare, Y.Ando, X.Zhao: ""Carbon Fibers from Kerosene"" Diamond Films and Technology. 8. 143-152 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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