SiO2 kaplı kübik Fe3O4 nanoparçacıkların sentezlenmesi ve karakterizasyonu

Yıl 2017, Cilt: 19 Sayı: 2, 227 - 236, 02.10.2017

Mustafa Coşkun Senem Çitoğlu

https://doi.org/10.25092/baunfbed.341110

Öz

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. 

Anahtar Kelimeler

Magnetik nanoparçacık, magnetik nanoparçacık hipertermi, Fe3O4, SiO2

Synthesis and characterization of SiO2 coated cubic Fe3O4 nanoparticles

Öz

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.

Anahtar Kelimeler

Magnetic nanoparticles, magnetic nanoparticles hyperthermia, Fe3O4, SiO2

Kaynakça

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