Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2005 · 12 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryNanomaterialsOptical MaterialsInorganic MaterialsMetal Oxide NanomaterialsMetal OxidesNanocompositesNanomaterial CharacterizationOxide SemiconductorsAngular DependenceEmission SpectraHeat Treatment EffectsNanocomposite MaterialsOxide CeramicsOxide StructureSpontaneous EmissionZinc Oxides
The structure of the opal-ZnO composites has been studied by TEM and X-ray methods. It was found that the solid state reaction of the opal-ZnO interface interaction is occurring during the heat treatment of the infiltrated samples resulting in the formation of the zinc silicate β-Zn<sub>2</sub>SiO<sub>4</sub> and its high temperature modification of willemite Zn<sub>2</sub>SiO<sub>4</sub>. Nanocomposite structure and emission properties have been studied in dependence on the filling degree. The blue luminescence at 430 nm stipulated for the β-Zn<sub>2</sub>SiO<sub>4</sub> phase has been observed for the sample with 25 filling cycles. Angular dependences of the PL and Reflection spectra of the opal-ZnO composite with 4 filling cycles demonstrate the suppression effect of the ZnO spontaneous emission in the stop band.
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