Abstract
Pyrolysis of 2-amino-4,6-dichloro-s-triazine over laser-etched thin films of cobalt deposited on an inverted silica substrate generates aligned bundles and films of carbon nanotubes of uniform dimensions. Scanning electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray analyses, electron energy loss spectroscopy and electron diffraction studies reveal that the aligned tubes, which usually grow perpendicular to the substrate surface, are mainly straight (length ≤100 μm; 30-50 nm OD), contain traces of nitrogen (<5%) and exhibit a preferred helicity (e.g. armchair 25-30%). Other graphitic structures (e.g. polyhedral particles, encapsulated particles and amorphous carbon) are absent. Energised cobalt clusters/particles (≤50 nm), ablated during laser-etching, may condense and recrystallise evenly on the surface of the substrate as cobalt and/or cobalt oxide. These crystals apparently play a key role in nanotube production.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 299-305 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 285 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - Mar 27 1998 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
Cite this
}
Preparation of aligned carbon nanotubes catalysed by laser-etched cobalt thin films. / Terrones Maldonado, Mauricio; Grobert, N.; Zhang, J. P.; Terrones, H.; Olivares, J.; Hsu, W. K.; Hare, J. P.; Cheetham, A. K.; Kroto, H. W.; Walton, D. R.M.
In: Chemical Physics Letters, Vol. 285, No. 5-6, 27.03.1998, p. 299-305.Research output: Contribution to journal › Article
TY - JOUR
T1 - Preparation of aligned carbon nanotubes catalysed by laser-etched cobalt thin films
AU - Terrones Maldonado, Mauricio
AU - Grobert, N.
AU - Zhang, J. P.
AU - Terrones, H.
AU - Olivares, J.
AU - Hsu, W. K.
AU - Hare, J. P.
AU - Cheetham, A. K.
AU - Kroto, H. W.
AU - Walton, D. R.M.
PY - 1998/3/27
Y1 - 1998/3/27
N2 - Pyrolysis of 2-amino-4,6-dichloro-s-triazine over laser-etched thin films of cobalt deposited on an inverted silica substrate generates aligned bundles and films of carbon nanotubes of uniform dimensions. Scanning electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray analyses, electron energy loss spectroscopy and electron diffraction studies reveal that the aligned tubes, which usually grow perpendicular to the substrate surface, are mainly straight (length ≤100 μm; 30-50 nm OD), contain traces of nitrogen (<5%) and exhibit a preferred helicity (e.g. armchair 25-30%). Other graphitic structures (e.g. polyhedral particles, encapsulated particles and amorphous carbon) are absent. Energised cobalt clusters/particles (≤50 nm), ablated during laser-etching, may condense and recrystallise evenly on the surface of the substrate as cobalt and/or cobalt oxide. These crystals apparently play a key role in nanotube production.
AB - Pyrolysis of 2-amino-4,6-dichloro-s-triazine over laser-etched thin films of cobalt deposited on an inverted silica substrate generates aligned bundles and films of carbon nanotubes of uniform dimensions. Scanning electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray analyses, electron energy loss spectroscopy and electron diffraction studies reveal that the aligned tubes, which usually grow perpendicular to the substrate surface, are mainly straight (length ≤100 μm; 30-50 nm OD), contain traces of nitrogen (<5%) and exhibit a preferred helicity (e.g. armchair 25-30%). Other graphitic structures (e.g. polyhedral particles, encapsulated particles and amorphous carbon) are absent. Energised cobalt clusters/particles (≤50 nm), ablated during laser-etching, may condense and recrystallise evenly on the surface of the substrate as cobalt and/or cobalt oxide. These crystals apparently play a key role in nanotube production.
UR - http://www.scopus.com/inward/record.url?scp=0000084620&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000084620&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(98)00093-1
DO - 10.1016/S0009-2614(98)00093-1
M3 - Article
AN - SCOPUS:0000084620
VL - 285
SP - 299
EP - 305
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 5-6
ER -