Formation of Iron-Containing Clusters in Silica of Predetermined Porosity

I. Šimkienea, M. Baranb, G.-J. Babonasa,c, R.-A. Bendoriusa,c, A. Rėzaa, R. Szymczakb, P. Aleshkevychb, R. Šustavičiūtėa and R. Tamaševičiusa aSemiconductor Physics Institute, Goštauto 11, 01108 Vilnius, Lithuania bInstitute of Physics, PAN, al. Lotników 32/46, 02-668 Warszawa, Poland cVilnius Gediminas Technical University, Saulėtekio 11, 10223 Vilnius, Lithuania

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Received: 22 08 2004;

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 Fe2O3 and Fe3O4 were formed in the samples and that their relative amount was dependent on preparation technology.

DOI: 10.12693/APhysPolA.107.400 PACS numbers:61.46.+w, 75.75.+a, 78.66.-w