Effect of NH3 and thickness of catalyst on growth of carbon nanotubes using thermal chemical vapor deposition

Yoon Taek Jang, Jin Ho Ahn, Yun-Hi Lee, Byeong Kwon Ju

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    75 Citations (Scopus)

    Abstract

    The growth behavior of carbon nanotubes synthesized from C2H2 using thermal chemical vapor deposition method has been investigated. The formation of catalytic cobalt nanoparticles was much enhanced when using NH3 as the environment gas, whereas NH3 introduced during nanotubes growth does not play a key role in growing the vertically aligned nanotubes. The role of NH3 is to obtain the high density of nucleation sites for nanotube growth by inhibiting amorphous carbon generation in the initial stage of synthesis. We found unexpected behavior in terms of the length and growth time during nanotube growth. The length of the nanotubes is inversely proportional to the size of nanoparticle just in the initial stages of growth and thick catalyst.

    Original languageEnglish
    Pages (from-to)745-749
    Number of pages5
    JournalChemical Physics Letters
    Volume372
    Issue number5-6
    DOIs
    Publication statusPublished - 2003 May 6

    Bibliographical note

    Funding Information:
    This work was partially supported by Contract No. 2M12800 and IMT 2000 Nano Technology Development Program of the Ministry of Commerce, Industry and Energy.

    ASJC Scopus subject areas

    • General Physics and Astronomy
    • Physical and Theoretical Chemistry

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