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Thin-film metal catalyst for the production of multi-wall and single-wall carbon nanotubes

Authors :
S. H. Dalal
Aun Shih Teh
David A. Jefferson
Gehan A. J. Amaratunga
John H. Durrell
Kenneth B. K. Teo
Manishkumar Chhowalla
Rodrigo G. Lacerda
William I. Milne
F. Wyczisk
Nalin L. Rupesinghe
Pierre Legagneux
Debdulal Roy
M. H. Yang
Source :
Journal of Applied Physics. 96:4456-4462
Publication Year :
2004
Publisher :
AIP Publishing, 2004.

Abstract

We present a detailed study of the growth of multiwall and single-wall carbon nanotubes (SWCNTs) by chemical-vapor deposition using a thin-film triple metal (Al∕Fe∕Mo) catalyst. Using Nanoauger spectroscopy, a full map of the metals in the sample surface is constructed and their evolution followed at different deposition temperatures. During the formation of SWCNTs at high temperatures (∼1000°C), the initial iron layer (∼1nm) is transformed into nanosized particles at the surface. In addition, the Al layer also plays a critical role during the annealing process by being altered into AlxOy particles. These particles act as a suitable underlayer to stabilize the nanosized Fe catalyst for nanotube growth. We also show that it is possible to resolve SWCNTs by mapping the areal intensity of carbon KVV Auger electrons.

Details

ISSN :
10897550 and 00218979
Volume :
96
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi.dedup.....c86e3c46dd45dcc0d33ed22a339c2c5d
Full Text :
https://doi.org/10.1063/1.1794359