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

Edwards, H.K.; Fay, Mike W.; Bououdina, M.; Gregory, D.H.; Walker, G.S.; Brown, Paul D.

Authors

H.K. Edwards

Mike W. Fay

M. Bououdina

D.H. Gregory

G.S. Walker

Paul D. Brown



Contributors

Stephen McVitie
Editor

David McComb
Editor

Abstract

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 600oC and 700oC 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.

Publication Date Jan 1, 2004
Peer Reviewed Peer Reviewed
Issue 179
Series Title Institute of Physics conference series
Book Title Electron Microscopy and Analysis 2003: Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Oxford, 3-5 September 2003
ISBN 750309679
APA6 Citation Edwards, H., Fay, M. W., Bououdina, M., Gregory, D., Walker, G., & Brown, P. D. (2004). Structural characterisation of carbon nanotubes in the presence of a Ni catalyst. In S. McVitie, & D. McComb (Eds.), Electron Microscopy and Analysis 2003: Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Oxford, 3-5 September 2003Institute of Physics Publishing
Keywords TEM
MWNT
CVD
Nickel
Related Public URLs http://iopscience.iop.org/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Inst._Phys._Conf._Ser._179_(2004)_pp_447-450.pdf (186 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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