Optical Properties of Nanostructured Sol–Gel Thin Films Doped with Fe2O3 and Their Ferromagnetic Characterization by Mössbauer Spectroscopy
| Autor: | Jorge A. García-Macedo, J.L. Pérez-Mazariego, Guadalupe Valverde-Aguilar, Raúl W. Gómez, Vivianne Marquina |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Doping Biomedical Engineering Analytical chemistry Infrared spectroscopy chemistry.chemical_element Bioengineering Nanotechnology General Chemistry Zinc Hematite Condensed Matter Physics chemistry visual_art Mössbauer spectroscopy visual_art.visual_art_medium General Materials Science Thin film Sol-gel Wurtzite crystal structure |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 8:6491-6496 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2008.019 |
| Popis: | 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 of matrices: zinc oxide (ZnO) and silica (SiO2). X-ray diffraction (XRD) was used for morphology and structure determination of the nanostructures and showed that the ZnO exhibit a wurtzite form when the film is annealed at 450 degrees C for 20 min. SiO2 thin films at C16H33PEO20:Fe2O3 = 1:2.7 x 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 of the films. In order to determine if the Fe2O3 was incorporated into the matrices, room temperature Mossbauer spectra of both samples were obtained. In both cases the hematite spectrum was obtained, corroborating that the incorporation of the Fe2O3 to the matrices was done without chemical reaction whatsoever. |
| Databáze: | OpenAIRE |
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