Cobalt doped magnetite nanoparticles: Synthesis, characterization, optimization and suitability evaluations for magnetic hyperthermia applications

2020 ◽  
Vol 116 ◽  
pp. 113759 ◽  
Author(s):  
Zeinab Erfani Gahrouei ◽  
Sheyda Labbaf ◽  
Ahmad Kermanpur
Keyword(s):  
Magnetite Nanoparticles ◽  
Magnetic Hyperthermia ◽  
Nanoparticles Synthesis

scholarly journals Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yaser Hadadian ◽  
Ana Paula Ramos ◽  
Theo Z. Pavan
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Linear Response Theory ◽  
Magnetic Hyperthermia ◽  
Superior Performance ◽  
Dipolar Interactions ◽  
Intrinsic Properties ◽  
Specific Loss ◽  
Heating Efficiency ◽  
Specific Loss Power

AbstractOptimizing the intrinsic properties of magnetic nanoparticles for magnetic hyperthermia is of considerable concern. In addition, the heating efficiency of the nanoparticles can be substantially influenced by dipolar interactions. Since adequate control of the intrinsic properties of magnetic nanoparticles is not straightforward, experimentally studying the complex interplay between these properties and dipolar interactions affecting the specific loss power can be challenging. Substituting zinc in magnetite structure is considered as an elegant approach to tune its properties. Here, we present experimental and numerical simulation results of magnetic hyperthermia studies using a series of zinc-substituted magnetite nanoparticles (ZnxFe1-xFe2O4, x = 0.0, 0.1, 0.2, 0.3 and 0.4). All experiments were conducted in linear regime and the results were inferred based on the numerical simulations conducted in the framework of the linear response theory. The results showed that depending on the nanoparticles intrinsic properties, interparticle interactions can have different effects on the specific loss power. When dipolar interactions were strong enough to affect the heating efficiency, the parameter σ = KeffV/kBT (Keff is the effective anisotropy and V the volume of the particles) determined the type of the effect. Finally, the sample x = 0.1 showed a superior performance with a relatively high intrinsic loss power 5.4 nHm2kg−1.

Magnetite nanoparticles: Synthesis, thin film properties and inkjet printing of magnetic cores for inductor applications

2014 ◽  
Vol 570 ◽  
pp. 38-44 ◽  
Author(s):  
Nenad Marjanović ◽  
Alessandro Chiolerio ◽  
Mahmut Kus ◽  
Faruk Ozel ◽  
Serhad Tilki ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetite Nanoparticles ◽  
Inkjet Printing ◽  
Film Properties ◽  
Magnetic Cores ◽  
Nanoparticles Synthesis

scholarly journals Stability and Relaxation Mechanisms of Citric Acid Coated Magnetite Nanoparticles for Magnetic Hyperthermia

2013 ◽  
Vol 117 (10) ◽  
pp. 5436-5445 ◽  
Author(s):  
M. Elisa de Sousa ◽  
Marcela B. Fernández van Raap ◽  
Patricia C. Rivas ◽  
Pedro Mendoza Zélis ◽  
Pablo Girardin ◽  
...  
Keyword(s):  
Citric Acid ◽  
Magnetite Nanoparticles ◽  
Magnetic Hyperthermia

scholarly journals Two Dimensions Simulation of a Magnetotactic Bacteria Cell Exposed to an Electromagnetic Field at 3 GHz

2021 ◽  
Vol 27 (3) ◽  
pp. 48-54
Author(s):  
Delia Luca ◽  
Simona Miclăuş
Keyword(s):  
Magnetite Nanoparticles ◽  
Power Distribution ◽  
Magnetotactic Bacteria ◽  
Magnetic Hyperthermia ◽  
Two Dimensions ◽  
Biological Objects ◽  
Simulation Process ◽  
Modeling Simulation ◽  
Biogenic Magnetite ◽  
Absorbed Power

Abstract The effect of the presence of magnetite nanoparticles inside biological objects when they are exposed to microwaves has not yet been investigated completely. Microwaves magnetic hyperthermia is a field under development, and the use of biogenic magnetite is a relatively new vista. In this regard, the present approach presents a first step in a modeling-simulation process focused on the computation of the absorbed power distribution in bacteria cells containing native magnetite nanoparticles in the form of chains (magnetosomes). The presented simulations’ results refer to the simplest case of two-dimensional computation, which doesn’t take into consideration the geometric and magnetic anisotropy characteristics of the real magnetosomes.

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