Synthesis of carbon nanotubes in mw plasma torch with different methods of catalyst layer preparation and their applications

0352540 - ÚPT 2011 RIV CZ eng C - Conference Paper (international conference)
Zajíčková, L. - Jašek, O. - Synek, P. - Eliáš, M. - Kudrle, V. - Kadlečíková, M. - Breza, J. - Hanzlíková, Renáta
Synthesis of carbon nanotubes in mw plasma torch with different methods of catalyst layer preparation and their applications.
NANOCON 2009 Conference Proceedings. Ostrava: TANGER, 2009, s. 149-155. ISBN 978-80-87294-13-0.
[NANOCON International Conference /1./. Rožnov pod Radhoštěm (CZ), 20.10.2009-22.10.2009]
Institutional research plan: CEZ:AV0Z20650511
Keywords : carbon nanotubes * chemical vapor deposition * secondary electron image
Subject RIV: JI - Composite Materials

The microwave plasma torch (2 45 GHz) was used for the synthesis of carbon nanotubes from the mixture of CH4/H-2/Ar or C2H2/H-2/Ar on different substrates with iron catalyst Iron catalyst was prepared by vacuum evaporation of iron on Si, Si/SiOx or Si/AlxO(Y) substrates or by deposition of iron oxide nanoparticles on Si/SiOx substrate by decomposion of Fe(CO)(5) in gas feed Such prepared substrates were used for growth of carbon nanotubes. Recostruction of the iron catalyst layer into nanoparticles was also studied in dependence on substrate buffer layer, gas atmosphere and temperature Samples were studied by scanning and transmission electron microscopy and Raman spectroscopy. Synthesis resulted in rapid growth of MWNTs on all samples but the density, purity and nanotube diameter distribution varied Such prepared carbon nanotube layers were used for sensing applications.
Permanent Link: http://hdl.handle.net/11104/0192029