ZAJÍČKOVÁ, Lenka, Petr SYNEK, Ondřej JAŠEK, Jaroslav HUBÁLEK, Jan PRÁŠEK a Vít KUDRLE. PLASMA TECHNOLOGIES FOR SYNTHESIS OF CARBON NANOTUBES AND IRON OXIDE NANOPARTICLES. In Nanocon 2012. 2012. ISBN 978-80-87294-35-2.
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Základní údaje
Originální název PLASMA TECHNOLOGIES FOR SYNTHESIS OF CARBON NANOTUBES AND IRON OXIDE NANOPARTICLES
Autoři ZAJÍČKOVÁ, Lenka, Petr SYNEK, Ondřej JAŠEK, Jaroslav HUBÁLEK, Jan PRÁŠEK a Vít KUDRLE.
Vydání Nanocon 2012, 2012.
Další údaje
Originální jazyk angličtina
Typ výsledku Konferenční abstrakt
Obor 10305 Fluids and plasma physics
Stát vydavatele Česká republika
Utajení není předmětem státního či obchodního tajemství
WWW URL
Organizační jednotka Přírodovědecká fakulta
ISBN 978-80-87294-35-2
Klíčová slova anglicky microwave torch; CNTs; iron oxides
Změnil Změnil: prof. Mgr. Vít Kudrle, Ph.D., učo 2560. Změněno: 11. 7. 2015 15:21.
Anotace
In many applications, plasma processing of materials appears to be an advantageous alternative to conventional chemical methods because it offers effective and environmentally friendly method for processing of materials. In this work, the surface bound deposition of carbon nanotubes (CNTs) and volume synthesis of iron oxide nanoparticles (NPs) was explored using microwave (MW) plasma torch. The torch is a laboratory plasma discharge that operates at atmospheric pressure and its gas temperature reaches several thousands of degrees. Therefore, it is a different plasma environment compared to other atmospheric pressure discharges used for plasma processing of materials, barrier discharges and cold plasma jets. The CNTs deposition from Ar/CH4/H2 mixture was studied with respect to the process of CNTs catalysis on different substrates and as electrode for electrochemical sensors. The effect of underlaying material was investigated for bare silicon, silicon oxide barrier layer and gold contacts. Tens of micrometer long multiwall nanotubes could be deposited on bare conductive silicon substrates. Synthesis of iron oxide NPs was accomplished from Fe(CO)5 vapors mixed with Ar and optionally O2. High purity maghemite NPs were obtained at optimized conditions. At high oxygen flow rates the synthesized mixture of NPs contained also epsilon-Fe2O3 that has unique magnetic properties. Spatially resolved OES of the mw torch was performed in various conditions of synthesis. The torch was imaged by a fast ICCD camera that visualized its dynamics and stability.
VytisknoutZobrazeno: 16. 5. 2022 15:20