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Raman characterisation of single-walled carbon nanotubes produced by catalytic pyrolysis of methane

Seifi, M, Ross, DK and Giannasi, A 2007, 'Raman characterisation of single-walled carbon nanotubes produced by catalytic pyrolysis of methane' , Carbon, 45 , pp. 1871-1879.

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Bundles of single-wall carbon nanotubes (SWCNT) were synthesised using a chemical vapour deposition technique. This basic process was optimised over a wide range of process parameters. For the optimal results, ethane was decomposed at 950 �C over a catalyst material consisting of 2% by wt Fe chemically deposited on an MgO support. The samples were characterised using scanning electron microscopy and transmission electron microscopy to show the presence of nanotubes and also to measure their diameters and the size of amorphous carbon deposits. Raman scattering was also used to probe the electronic properties and hence derive the distribution of diameters of the SWCNT. Samples were measured in both the radial breathing mode and tangential mode ranges using three different laser lines. For comparison purposes, similar data have been reported for a standard commercial SWCNT material (HiPCO). From the data, we can conclude that the tubes in our sample are significantly different to those in the HiPCO sample. In particular, we conclude that samples produced by our method contain a much narrower distribution of tube diameters than does the commercial sample.

Item Type: Article
Themes: Energy
Schools: Schools > College of Science & Technology > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Carbon
Publisher: Elsevier
Refereed: Yes
ISSN: 0008-6223
Depositing User: Prof D. Keith Ross
Date Deposited: 23 Apr 2012 10:58
Last Modified: 29 Oct 2015 00:12
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