Iron-containing nanoparticles and clusters were formed in silica with porosity, which was predetermined by different procedures of sol-gel technology and the chemical composition of precursors. Bulk and layer-type samples of different porosity were synthesized and investigated. The morphology, magnetic, and optical properties were studied to characterize the samples and to analyze the formation of Fe-oxides. Experimental results showed that both Fe 2 O 3 and Fe 3 O 4 were formed in the samples and that their relative amount was dependent on preparation technology.
Porous silica layers on Si substrates were produced by sol-gel spin-on technique. The structural studies and ellipsometric measurements have been carried out in order to investigate the dependence of silica properties on growth technology and thermal annealing. The dense SiO2 layers from acid tetraethoxysilane-based precursors and the layers of increased porosity obtained from precursors containing surfactant cethyltrimethylammonia bromide were investigated. The hybrid type Fe-doped silica layers were also produced and studied. The provided investigations have shown that the method used is perspective for fabrication of porous silica layers and for obtaining hybrid samples.
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