Nukleonika · 2015 · 12 citations · 10 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsMaterials ChemistryNanomaterialsIron OxidesMagnetic NanomaterialsMetal Oxide NanomaterialsNanomaterial CharacterizationNanomaterials SynthesisNanowiresAnnealingAnnealing Temperature EffectsChemical Reduction SynthesisComposition-dependent Phase BehaviorMagnetic NanowiresNanowire CharacterizationNanowire SynthesisPhase Composition
Abstract Raman spectroscopy as well as Mössbauer spectroscopy were applied in order to study the phase composition of iron nanowires and its changes, caused by annealing in a neutral atmosphere at several temperatures ranging from 200°C to 800°C. As-prepared nanowires were manufactured via a simple chemical reduction in an external magnetic field. Both experimental techniques proved formation of the surface layer covered by crystalline iron oxides, with phase composition dependent on the annealing temperature ( T a ). At higher T a , hematite was the dominant phase in the nanowires.
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