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Ammonia assisted gr...
Ammonia assisted growth of multiwalled carbon nanotubes
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- Nitze, Florian, 1971- (author)
- Umeå universitet,Institutionen för fysik,Nanofysik och Material
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- Andersson, Britt (author)
- Umeå universitet,Institutionen för tillämpad fysik och elektronik
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- Wågberg, Thomas (author)
- Umeå universitet,Institutionen för fysik,Nanofysik och Material
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(creator_code:org_t)
- 2009-10-06
- 2009
- English.
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In: Physica status solidi. B, Basic research. - : Wiley. - 0370-1972 .- 1521-3951. ; 246:11-12, s. 2440-2443
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Bamboo structured nitrogen-containing carbon nanotubes are grown on e-beam deposited thin metal films (cobalt/iron) by chemical vapor deposition. The approach uses ammonia as supporting gas to form nano catalyst particles in the pretreatment phase. Ammonia is also used as nitrogen source. The effect of ammonia on the grown structures at different temperatures (720 and 810 °C) is investigated by SEM, TEM and Raman spectroscopy. We show that ammonia promotes growth of vertically aligned CNT carpets on thicker metal films (5 nm) than usually used. At the same time ammonia is inducing a high amount of defects but this effect changes significantly with temperature. At 720 °C defects are clearly ammonia induced while at 810 °C the defects seem to be induced by a different mechanism. Furthermore, the presence of ammonia in both pretreatment phase and growth phase reduces the outer diameter of the grown nanotubes.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Carbon nanotubes
- Chemical Vapor deposition
- Raman spectroscopy
- Condensed matter physics
- Kondenserade materiens fysik
- fasta tillståndets fysik
- Solid State Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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