Dependence of specific absorption rate on concentration of Fe3O4 nanoparticles: from the prediction of Monte Carlo simulations to experimental results
Authors: Le Tri Dat · Luu Huu Nguyen · Nguyen Hoai Nam · Tuan Dinh Van · Le The Tam · Nguyen Xuan Truong · Van‑Quynh Nguyen · Pham Thanh Phong · Pham Hong Nam
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Publishing year: 10/2022
distance. Furthermore, Fe3O4 NPs of size range from
7 to 17 nm have been synthesized with high magnetization saturation (65.1–68.1 emu/g) and their superparamagnetic behaviors have been determined. The
experimental results indicated that the SAR value
could increase with the concentration and has a bell
shape at a specific size of MNPs, which are in good
agreement with the theoretical simulation. All theoretical and experimental study of SAR recognized
the important role of magnetic anisotropy to enhance
SAR values. Especially, the results showed that there
exists an optimal concentration at 15 mg/ml for 17 nm
Fe
3O4 NPs that maximized SAR value.
Abstract Specific absorption rate (SAR) of magnetic iron oxide (Fe3O4) nanoparticles (NPs) is an
important property in hyperthermia applications. In
this work, the dependence of magnetic anisotropy
(K) on concentration of Fe3O4 NPs has been investigated using the Monte Carlo simulations. The results
showed that the K value increases with the NPs concentration which helps to clarify the dual behavior
of both increase and decrease of SAR value with
concentration based on the Linear Response Theory
(LRT). The theoretical results explained the influence of concentration on SAR based on the relationship between magnetic anisotropy and inter-particle
Monte Carlo simulation · Concentration · Specific absorption rate · Magnetic anisotropy · Inter-particle interactions
