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

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

Research output: Contribution to journal › Conference article › peer-review

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 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.

Original language	English
Pages (from-to)	447-450
Number of pages	4
Journal	Institute of Physics Conference Series
Volume	179
Publication status	Published - 2004
Externally published	Yes
Event	Electron Microscopy and Analysis 2003 - Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference - Oxford, United Kingdom Duration: Sept 3 2003 → Sept 5 2003

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Cite this

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title = "Structural characterisation of carbon nanotubes in the presence of a Ni catalyst",

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 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.",

author = "Edwards, {H. K.} and Fay, {M. W.} and M. Bououdina and Gregory, {D. H.} and Walker, {G. S.} and Brown, {P. D.}",

year = "2004",

language = "English",

volume = "179",

pages = "447--450",

journal = "Institute of Physics Conference Series",

issn = "0951-3248",

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note = "Electron Microscopy and Analysis 2003 - Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference ; Conference date: 03-09-2003 Through 05-09-2003",

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TY - JOUR

T1 - Structural characterisation of carbon nanotubes in the presence of a Ni catalyst

AU - Edwards, H. K.

AU - Fay, M. W.

AU - Bououdina, M.

AU - Gregory, D. H.

AU - Walker, G. S.

AU - Brown, P. D.

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

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M3 - Conference article

AN - SCOPUS:5044239168

SN - 0951-3248

VL - 179

SP - 447

EP - 450

JO - Institute of Physics Conference Series

JF - Institute of Physics Conference Series

T2 - Electron Microscopy and Analysis 2003 - Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference

Y2 - 3 September 2003 through 5 September 2003

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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