Noncatalytic synthesis of carbon nanotubes by chemical vapor deposition |
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Authors: | R R Ismagilov P V Shvets A Yu Kharin A N Obraztsov |
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Institution: | 1.Moscow State University,Moscow,Russia |
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Abstract: | A new method is proposed to obtain uniform arrays of multiwall carbon nanotubes without catalysts. Nanotubes have been formed
by carbon condensation from a hydrogen-methane gas mixture activated by a dc discharge. Structural and morphological investigations
of the obtained material were performed by Raman spectroscopy, scanning and transmission electron microscopy, energy-dispersive
X-ray analysis, and electron energy loss spectroscopy. It is shown that the obtained nanotubes contain no impurities that
could act as catalysts. Based on these experimental data, it is concluded that the nanotube synthesis under study is noncatalytic.
Possible mechanisms of this synthesis are considered. |
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Keywords: | |
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