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Thermal Degradation of Single-Walled Carbon Nanotubes during Alcohol Catalytic Chemical Vapor Deposition Process

Mohd Abid, Mohd Asyadi Azam (2010) Thermal Degradation of Single-Walled Carbon Nanotubes during Alcohol Catalytic Chemical Vapor Deposition Process. Japanese Journal of Applied Physics (JJAP), 49. 02BA04. ISSN Online: 1347-4065 / Print: 0021-4922

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Abstract

We have grown single-walled carbon nanotubes (SWCNTs) from Co catalyst thin films using the alcohol catalytic chemical vapor deposition (CVD) method for different CVD processing times. The structural properties of the SWCNTs grown have been investigated by Raman spectroscopy with various laser excitations. The growth progressed up to t = 20 min, but the Raman intensity of SWCNTs decreased with increasing CVD processing time. The quality of as-grown SWCNTs also decreased with increasing CVD processing times, similar to the trend for Raman intensity. Raman intensity analysis in the radial breathing mode (RBM) region shows a relatively wide distribution for SWCNTs grown for all CVD processing times, owing to the variations in growth and burning rates with SWCNT diameter. In this paper, we suggest that Co catalyst poisoning and SWCNT burning occur when the CVD processing time is more than 20 min.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: Dr Mohd Asyadi 'Azam Bin Mohd Abid
Date Deposited: 23 Jul 2012 08:51
Last Modified: 28 May 2015 03:26
URI: http://eprints.utem.edu.my/id/eprint/4606

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