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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/1274

Title: Thermogravimetric analysis of cobalt-filled carbon nanotubes deposited by chemical vapour deposition
Authors: RAMESH BABU, P
BLAU, WJ
TYAGI, PK
MISRA, DS
ALI, N
GRACIO, J
CABRAL, G
TITUS, E
Keywords: carbon nanotubes
chemical vapor deposition
thermogravimetric analysis
Issue Date: 2006
Publisher: Elsevier
Citation: Thin Solid Films 494(1-2), 128-132
Abstract: In this paper, we report results from an investigation studying the purification of Co-filled carbon nanotubes (CNTs) using Thermogravimetric analysis (TGA). The as-grown CNTs were prepared using Microwave Plasma Chemical Vapour Deposition (MPCVD). Transmission electron microscopy (TEM), Fourier Transform Infrared (FTIR) and Raman spectroscopy were used to characterise the CNT samples. The CNTs produced by MPCVD were filled with cobalt and consisted of thick multi-walls. After TGA purification at 900 °C, 30 wt.% Co-filled CNTs remained in the TGA pan. However, while investigating the un-filled commercial CNTs (thin multiwalled), the sample completely burnt out at around 650 °C in the TGA furnace. The high thermal stability and the ability of thick-walled CNTs to act as an effective protective shield which prevents the oxidation of encapsulated cobalt have been demonstrated.
URI: 10.1016/j.tsf.2005.08.220
http://hdl.handle.net/10054/1274
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1274
ISSN: 0040-6090
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