| ZAJÍČKOVÁ, Lenka, Marek ELIÁŠ, Ondřej JAŠEK, Vít KUDRLE, Zdeněk FRGALA, Jiřina MATĚJKOVÁ, Jiří BURŠÍK and Magdaléna KADLEČÍKOVÁ. Atmospheric pressure microwave torch for synthesis of carbon nanotubes. Plasma Physics and Controlled Fusion. Bristol,UK: Institute of Physics Publishing, 2005, vol. 47, 12B, p. B655-B666, 12 pp. ISSN 0741-3335. |
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@article{602345,
author = {Zajíčková, Lenka and Eliáš, Marek and Jašek, Ondřej and Kudrle, Vít and Frgala, Zdeněk and Matějková, Jiřina and Buršík, Jiří and Kadlečíková, Magdaléna},
article_location = {Bristol,UK},
article_number = {12B},
keywords = {carbon nanotubes; microwave torch; atmospheric pressure; emission spectroscopy; scanning electron microscopy},
language = {eng},
issn = {0741-3335},
journal = {Plasma Physics and Controlled Fusion},
title = {Atmospheric pressure microwave torch for synthesis of carbon nanotubes},
url = {http://www.iop.org/EJ/abstract/0741-3335/47/12B/S48},
volume = {47},
year = {2005}
}
TY - JOUR
ID - 602345
AU - Zajíčková, Lenka - Eliáš, Marek - Jašek, Ondřej - Kudrle, Vít - Frgala, Zdeněk - Matějková, Jiřina - Buršík, Jiří - Kadlečíková, Magdaléna
PY - 2005
TI - Atmospheric pressure microwave torch for synthesis of carbon nanotubes
JF - Plasma Physics and Controlled Fusion
VL - 47
IS - 12B
SP - B655-B666
EP - B655-B666
PB - Institute of Physics Publishing
SN - 07413335
KW - carbon nanotubes
KW - microwave torch
KW - atmospheric pressure
KW - emission spectroscopy
KW - scanning electron microscopy
UR - http://www.iop.org/EJ/abstract/0741-3335/47/12B/S48
N2 - The microwave (mw) plasma torch at atmospheric pressure has been studied for carbon nanotube (CNT) synthesis. The depositions were carried out on silicon substrates with 515 nm thin iron catalytic overlayers from the mixture of argon, hydrogen and methane. The optical emission spectroscopy of the torch showed the presence of C2 and CH radicals as well as carbon and hydrogen excited atoms. The vicinity of the substrate influenced the relative intensities and increased the emission of C2. For fixed mw power, the temperature of the substrate strongly depended on its position with respect to the nozzle electrode and on the gas mixture, particularly the amount of H2. The speed of the substrate heating during an early deposition phase had a significant effect on the CNT synthesis. An abrupt increase of the temperature at the beginning increased the efficiency of theCNTsynthesis. Areas of dense straight standing CNTs, 30 nm in average diameter, with approximately the same sized iron nanoparticles on their tops were found in accordance with the model of growth by plasma enhanced chemical vapour deposition. However, the deposit was not uniform and a place with only several nanometres thick CNTs grown on much larger iron particles was also found. Here, taking into account the gas temperature in the torch, 31003900 K, we can see similarities with the dissolutionprecipitation model of the CNT growth by high temperature methods, arc or laser ablation.
ER -
ZAJÍČKOVÁ, Lenka, Marek ELIÁŠ, Ondřej JAŠEK, Vít KUDRLE, Zdeněk FRGALA, Jiřina MATĚJKOVÁ, Jiří BURŠÍK and Magdaléna KADLEČÍKOVÁ. Atmospheric pressure microwave torch for synthesis of carbon nanotubes. \textit{Plasma Physics and Controlled Fusion}. Bristol,UK: Institute of Physics Publishing, 2005, vol.~47, 12B, p.~B655-B666, 12 pp. ISSN~0741-3335.
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