Optical properties of nanostructured sol-gel thin films doped with Fe2O3 and the study of their ferromagnetic properties by Mössbauer spectroscopy

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Título :	Optical properties of nanostructured sol-gel thin films doped with Fe2O3 and the study of their ferromagnetic properties by Mössbauer spectroscopy
Palabras clave :	Mossbauer iron nanoparticles
Fecha de publicación :	16-ene-2013
Editorial :	Journal of Nanoscience and Nanotechnology
Descripción :	Sol–gel thin films containing Fe2O3 were deposited onto glass substrates by the dip-coating method at room temperature. Fe2O3 enriched with the isotope 57Fe was embedded in two kinds ofmatr ices: zinc oxide (ZnO) and silica (SiO2). X-ray diffraction (XRD) was used for morphology and structure determination ofthe nanostructures and showed that the ZnO exhibit a wurtzite form when the film is annealed at 450 C for 20 min. SiO2 thin films at C16H33PEO20:Fe2O3 = 1:2.7×10−1 molar concentration exhibit a hexagonal nanophase produced by the diblock copolymer Brij58 (C16H33PEO20). Optical absorption and infrared spectroscopy techniques were used to evaluate the optical quality ofthe films. In order to determine ifthe Fe2O3 was incorporated into the matrices, room temperature Mössbauer spectra ofboth samples were obtained. In both cases the hematite spectrum was obtained, corroborating that the incorporation ofthe Fe2O3 to the matrices was done without chemical reaction whatsoever.
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/10633
Otros identificadores :	1533-4880 http://hdl.handle.net/123456789/111
Aparece en las colecciones:	Doctorado

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