Versatile low-pressure plasma-enhanced process for synthesis of iron and iron-based magnetic nanopowders

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Authors	ZELINA Peter JAŠEK Ondřej KUDRLE Vít DAVID Bohumil PIZÚROVÁ Naděžda PAVLIŇÁK David VORÁČ Zbyněk HEMZAL Dušan
Year of publication	2012
Type	Article in Periodical
Magazine / Source	World Journal of Engineering
MU Faculty or unit	Faculty of Science
Citation
Field	Plasma physics
Keywords	Plasma synthesis; PECVD; Nanoparticle; Magnetic nanopowder; Iron oxide
Attached files	11-P._Zelina.pdf
Description	Using microwave low-pressure discharge, we synthesised magnetic iron-oxide nanopowder from the iron pentacarbonyl precursor. We were able to vary the size and chemical composition (especially the ratio between various iron oxides) by careful control of the process parameters. The nanoparticulate product was analysed by X-ray diffraction (XRD) and Raman spectroscopy. However, the XRD cannot reliably distinguish between the size-broadened peaks of gamma-Fe2O3 (maghemite) and Fe3O4 (magnetite) due to their nearly identical crystalline structure. Hence we used a chemical method to determine the presence of Fe(II) and Fe(III) ions in the nanopowder samples. The results agree with those from the Raman spectroscopy.
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