Secondary growth of carbon nanotubules by the fragments of Ni tip

We report the generation of small Ni particles by the fragmentation of Ni tips during the growth process of vertically aligned carbon nanotubules at 500 °C. A high-voltage transmission electron microscopy study revealed the role of small Ni particles in the secondary growth of carbon nanotubules. Th...

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Bibliographic Details
Published inJournal of applied physics Vol. 92; no. 12; pp. 7459 - 7461
Main Authors Park, Gyeong-Su, Kim, Mi-Young, Baik, Hyeon-Seok, Song, Se-Ahn, Han, In-Taek, Lee, Nae-Sung, Han, Jae-Hee, Yoo, Ji-Beom
Format Journal Article
LanguageEnglish
Published 15.12.2002
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Summary:We report the generation of small Ni particles by the fragmentation of Ni tips during the growth process of vertically aligned carbon nanotubules at 500 °C. A high-voltage transmission electron microscopy study revealed the role of small Ni particles in the secondary growth of carbon nanotubules. The small Ni particles lead to catalytic growth of a large amount of nanobell-like carbon nanotubules ranging from 10 to 20 nm in diameter. Comparison of the Ni tip structure formed at 500 °C with that at 620 °C suggests that only the proper size of Ni particles can lead to the secondary growth of carbon nanotubules. We propose a phenomenological model for the secondary growth of carbon nanotubules.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1521516