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2002 Fiscal Year Final Research Report Summary

Study on Growth Mechanism of Carbon Nanotubes Grown Using Self-Organized Catalyst Nanoclusters

Research Project

Project/Area Number 13355003
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 表面界面物性
Research InstitutionOsaka University

Principal Investigator

OURA Kenjiro  Osaka University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (60029288)

Co-Investigator(Kenkyū-buntansha) HONDA Shinichi  Osaka University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (90324821)
KATAYAMA Mitsuhiro  Osaka University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (70185817)
Project Period (FY) 2001 – 2002
Keywordscarbon nanotube / self-organized catalyst nanoparticle / chemical vapor deposition / growth mechanism / control of morphology / alignment / crystallinity / field electron emission property
Research Abstract

Carbon nanotube (CNT) has been synthesized by chemical vapor deposition (CVD), arc discharge, laser vaporization and so on. So far the growth mechanism of the CNT has been proposed. In the proposed mechanism, the key steps are the formation and liquefaction of the catalyst nanoparticles. However, the growth mechanism of CNT has not been fully elucidated. In this project, self-organized catalyst nanoparticles are used as a nucleation seed of the CNT with the aim of investigating the growth mechanism of CNT. It is known that the properties of metal nanoparticles such as size, shape, crystallinity, or crystallographic plane are well-controlled using hydrogen-induced self-organization. The new findings worthy of special mention are as follows.
(1) We successfully synthesized CNTs with different orientations using self-organized catalyst metal nanoparticles by CVD. By optimizing the growth conditions, lateral or vertical growth of the CNTs was demonstrated against the substrates. Moreover, it was found that assisting plasma during CVD improved the vertical alignment of the CNTs.
(2) The structural properties of the grown CNTs with different orientations against the substrates were characterized. Based on the TEM observation for the CNTs, a new growth model was proposed. In the model, the shape of the self-organize catalyst nanoparticles considerably affects the growth of the CNTs. The field electron emission (FE) property for the obtained CNTs was also investigated. As a result, the randomly oriented CNTs exhibited better FE property, indicating the surface defect could be an emission site on the CNTs.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] M.Katayama 他6名: "Enhancement of Electron Field Emission from Amorphous Carbon Films by Plasma Treatment"J. Vac. Sci. Technol.. B19. 1953-1957 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Oura 他8名: "Formation of Vertically Aligned Carbon Nanotubes by Dual-RF-Plasma Chemical Vapor Deposition"Jpn. J. Appl. Phys.. 40. L631-L634 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Oura 他6名: "Formation of Graphite Layers during Carbon Nanotubes Growth"Jpn. J. Appl. Phys.. 42. 579-581 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Oura 他8名: "Method for Aligned Bamboolike Carbon Nanotube Growth using RF Magnetron Sputtering"Jpn. J. Appl. Phys.. 42. 713-715 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Katayama 他7名: "Low Temperature Synthesis of Aligned Carbon Nanotubes by Inductively Coupled Plasma Chemical Vapor Deposition using Pure Methane"Jpn. J. Appl. Phys.. 42. L441-L443 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Oura 他7名: "Influence of Plasma Condition on the Morphology of Vertically Aligned Carbon Nanotubes Films grown by RF Plasma Chemical Vapor Deposition"Surf. Rev. Lett.. 10(in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.-Y.Lee, J.-T.Ryu, K.Fujimoto, S.Honda, M.Katayama, T.Hirao and K.Oura: "Enhancement of Electron Field Emission from Amorphous Carbon Films by Plasma Treatments"J. Vac. Sci. Technol.. B19. 1953-1957 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Hirao, K.Ito, H.Furuta, Y.K.Yap, T.Ikuno, S.Honda, Y.Mori, T.Sasaki and K.Oura: "Formation of Vertically Aligned Carbon Nanotubes by Dual-RF-Plasma Chemical Vapor Deposition"Jpn. J. Appl. Phys.. 40. L631-L634 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.-G.Baek, T.Ikuno, J.-T.Ryu, S.Honda, M.Katayama, K.Oura and T.Hirao: "Field Electron Emission from Amorphous Carbon Films Grown in Pure Methane Plasma"Appl. Surf. Sci.. 185. 243-247 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ikuno, T.Yamamoto, M.Kamizono, S.Takahashi, H.Furuta, S.Honda, S.Ohkura, M.Katayama, T.Hirao and K.Oura: "Large Field Emission from Carbon Nanotubes Grown on Patterned Catalyst Thin Film by Thermal Chemical Vapor Deposition"Physica. B323. 171-173 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ikuno, H.Furuta, T.Yamamoto, S.Takahashi, M.Kamizono, S.Honda, M.Katayama, T.Hirao and K.Oura: "Structural Characterization of Randomly and Vertically Oriented Carbon Nanotube Films Grown by Chemical Vapor Deposition"Surf. Interface Anal.. 35. 15-18 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.-G.Baek, S.Honda, T.Ikuno, S.Ohkura, M.Katayama, T.Hirao and K.Oura: "Formation of Graphite Layers during Carbon Nanotubes Growth"Jpn. J. Appl. Phys.. 42. 579-581 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.-Y.Lee, S.Honda, T.Ikuno, K.Fujimoto, K.Tsuji, S.Ohkura, M.Katayama, K.Oura and T.Hirao: "Method for Aligned Bamboolike Carbon Nanotube Growth using RF Magnetron Sputtering"Jpn. J. Appl. Phys.. 42. 713-715 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Honda, M.Katayama, K.-Y.Lee, T.Ikuno, S.Ohkura, K.Oura, H.Furuta and T.Hirao: "Low Temperature Synthesis of Aligned Carbon Nanotubes by Inductively Coupled Plasma Chemical Vapor Deposition using Pure Methane"Jpn. J. Appl. Phys.. 42. L441-L443 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ikuno, S.Takahashi, K.Kamada, S.Ohkura, S.Honda, M.Katayama, T.Hirao and K.Oura: "Influence of Plasma Condition on the Morphology of Vertically Aligned Carbon Nanotube Films grown by RF Plasma Chemical Vapor Deposition"Surf. Rev. Lett.. 10, No.4 (in press). (2003)

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

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Published: 2004-04-14  

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