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Morphology study of carbon nanospecies grown on carbon fibers by thermal CVD technique

DSpace at IIT Bombay

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Title Morphology study of carbon nanospecies grown on carbon fibers by thermal CVD technique
 
Creator SHARMA, SP
LAKKAD, SC
 
Subject carbon nanotubes
chemical vapor deposition
morphology
high resolution transmission electron microscopy
 
Description Multiwalled carbon nanotubes were uniformly grown directly on Ni catalyzed carbon fibers by catalytic decomposition of acetylene at 700 °C using thermal chemical vapour deposition process. Different
process parameters such as growth temperature, time and gas flow rates were investigated in relation to morphology and yield of the products. The overall yield of the nanospecies demonstrated an initial nonlinear increase and eventually stabilized with increasing deposition time while it was found reaching to maxima at 700 °C and drops rapidly at temperatures on either side. The morphology of nanostructures was examined extensively using scanning and transmission electron microscopy which revealed formation of various carbon nanostructures such as nanofilaments, nanofibers, nanoladders, nanospirals, nanojunctions, nanocones, nanoonions etc. accompanying nanotubes. High resolution transmission electron microscopy images clearly showed single crystal structure of the catalyst particle and tip-growth mechanism of carbon nanotubes growth. Non-tip growth mechanism was observed in especial case of ferrocene derived floating Fe catalyst.
 
Publisher Elsevier
 
Date 2009-09-12T08:15:35Z
2011-11-25T15:18:36Z
2011-12-26T13:04:35Z
2011-12-27T05:50:33Z
2009-09-12T08:15:35Z
2011-11-25T15:18:36Z
2011-12-26T13:04:35Z
2011-12-27T05:50:33Z
2009
 
Type Article
 
Identifier Surface and Coatings Technology 203(10-11), 1329-1335
0257-8972
http://dx.doi.org/10.1016/j.surfcoat.2008.10.043
http://hdl.handle.net/10054/1624
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1624
 
Language en