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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 γ-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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This work studies the products of plasma polymerized (NPCl2)3, (NPCl2)4 and (NPF2)3. Reaction products were examined by the 31P‐NMR, LDI‐TOF MS, DIP‐MS, IR and XPS. To achieve a successful reaction of (NPCl2)4 it is crucial that the phosphazene is carefully heated to a temperature of about 60 °C. Analysis demonstrated that products of plasma polymerization are similar for all halogenophosphazenes and mainly consist of branched chains. The best homogeneity, adhesion to substrate and also easiest substitution of halogen atoms by nucleophilic reagents was achieved with plasma polymerized (NPF2)3. Prepared polymers could be used for surface improvement and as flame‐retardants.