Structural characterisation of carbon nanotubes in the presence of a Ni catalyst

H. K. Edwards, M. W. Fay, M. Bououdina, D. H. Gregory, G. S. Walker, P. D. Brown

研究成果: Contribution to journalConference article査読

抄録

Multi-wall carbon nanotubes (MWNTs) grown by chemical vapour deposition (CVD) of an ethene / hydrogen gas mixture on alumina supported and unsupported nickel catalysts for 10, 20 and 120 minutes at 600°C and 700°C are compared. Nano-scale nickel particles were identified at the tube ends and also within the main body of the tubes. The particles exhibited comet like structures suggesting the metal to be highly mobile if not molten during processing. HREM observations demonstrate the carbon planes to be parallel to the nickel particle surfaces, while eventually becoming drawn out to define the carbon tube walls. The tubes are generally found to emanate from larger encapsulated nickel particles. A growth mechanism involving the propulsion of mobile nickel through the precipitation of the carbon is discussed.

本文言語英語
ページ(範囲)447-450
ページ数4
ジャーナルInstitute of Physics Conference Series
179
出版ステータス出版済み - 10 19 2004
外部発表はい
イベントElectron Microscopy and Analysis 2003 - Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference - Oxford, 英国
継続期間: 9 3 20039 5 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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