SiO2 kaplı kübik Fe3O4 nanoparçacıkların sentezlenmesi ve karakterizasyonu

Abstract

Bu çalışmada, Fe₃O₄ nanoparçacıkları, kimyasal yöntemle kübik şekilde sentezlenmiştir. Nanoparçacıkların kristal yapıları XRD spektroskopisi ve yüzey morfolojileri ise Geçirimli Elektron Mikroskobu (TEM) çalışmalarıyla belirlenmiştir. Sentezlenen Fe₃O₄ nanoparçacıkları SiO₂ ile kaplanarak, kaplamanın bu nanoparçacıkların yapısal ve magnetik özellikleri üzerine olan etkileri araştırılmıştır. Sentezlenen magnetik nanoparçacıkların ısı soğurumundan sorumlu olan ve RF magnetik alan şiddeti, parçacık boyut dağılımı, anizotropi katsayısı, doyum magnetizasyonu, yüzey işlemi, parçacık yoğunluğu gibi parametreleri içeren histeresis mekanizmalarının incelenmesi için magnetizasyon ölçümleri yapılmıştır. Örneklerin magneto-ısıl özellikleri Öz güç-soğurma hızı (SAR) değerleri ölçülerek belirlenmiştir. 

Keywords

• Magnetik nanoparçacık,magnetik nanoparçacık hipertermi,Fe3O4,SiO2

Synthesis and characterization of SiO2 coated cubic Fe3O4 nanoparticles

Abstract

In this work, Cubic Fe₃O₄ nanoparticles were prepared by chemical methods. The crystal structures and surface morphologies had confirmed by XRD spectroscopy and TEM studies. Synthesized Fe₃O₄ nanoparticles were coated with SiO₂. The effects of SiO₂ coating on the structural and magnetic properties of the synthesized nanoparticles were investigated. Magnetic hysteresis properties of the nanoparticles studied using VSM techniques. Histeresis mechanisms (including relevant parameters such as the amplitude of alternating magnetic field, particle size distribution, anisotropy constant, saturation magnetization, surface treatment, the concentrations of particles) responsible for heat dissipation in the synthesized systems of nanoparticles. Magneto-thermal properties were determined by measuring SAR values.

Keywords

• Magnetic nanoparticles,magnetic nanoparticles hyperthermia,Fe3O4,SiO2

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