Versatile PECVD process for preparation of iron-based magnetic nanoparticles

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Authors	ZELINA Peter JAŠEK Ondřej KUDRLE Vít DAVID Bohumil PIZÚROVÁ Naděžda
Year of publication	2011
Type	Article in Proceedings
Conference	Proceedings of ICCE 19
MU Faculty or unit	Faculty of Science
Citation
Field	Plasma physics
Keywords	Plasma synthesis; PECVD; Nanoparticle; Magnetic nanopowder; Iron oxide
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.
Related projects:	Study and application of plasma chemical reactions in non-isothermic low temperature plasma and its interaction with solid surface