Journal ArticleDOI
Magnetic hyperthermia properties of iron oxide nanoparticles: The effect of concentration
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In this paper, the effect of concentration on magnetic hyperthermia properties of Fe3O4 nanoparticles (NPs) was investigated via an induction heater generating alternating magnetic field with frequency of 92 kHz.Abstract:
We investigated the effect of concentration on magnetic hyperthermia properties of Fe3O4 nanoparticles (NPs). The NPs were synthesized by co-precipitation method at 80 °C. Scanning electron microscope image showed that the mean diameter of NPs is about 18 nm. The XRD pattern indicated that the sample is pure Fe3O4 with spinel structure and the FT-IR spectroscopy confirmed formation of metal-oxygen bonds in the octahedral and tetrahedral spinel sub-lattice which further confirmed crystalline structure of the sample. The hyperthermia property of Fe3O4 NPs was investigated via an induction heater generating alternating magnetic field with frequency of 92 kHz. The temperature rise (ΔT) of suspension in the AC magnetic field was studied on different concentrations of NPs and the specific absorption rate (SAR) was obtained from Box-Lucas equation and linear fitting of ΔT-time curve. The results showed that the ΔT sharply increases with increasing the NPs concentration while the SAR remains almost constant.read more
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Application of nanoparticles in biofuels: an overview
Patrick T. Sekoai,Cecil N.M. Ouma,Stephanus P. du Preez,Phillimon Modisha,Nicolaas Engelbrecht,Dmitri Bessarabov,Anish Ghimire +6 more
TL;DR: This review critically examines the various studies in literature that have explored nanoparticles in biofuel processes such as biohydrogen, biogas, biodiesel and bioethanol production, towards enhancing their process yields and elucidates the different types of nanomaterials that have been used in these bioprocesses.
Journal ArticleDOI
Surfactant-free synthesis and magnetic hyperthermia investigation of iron oxide (Fe3O4) nanoparticles at different reaction temperatures
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An Overview of Micronanoswarms for Biomedical Applications.
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Journal ArticleDOI
The Influence of Synthesis Parameters on Structural and Magnetic Properties of Iron Oxide Nanomaterials.
Laura Madalina Cursaru,Roxana Mioara Piticescu,Dumitru Valentin Dragut,Ioan Albert Tudor,Victor Kuncser,Nicusor Iacob,Florentin Stoiciu +6 more
TL;DR: It has been found that pressure influences the type of iron oxide crystalline phase, and results obtained by Mössbauer characterization are in excellent agreement with X-ray diffraction and optical microscopy characterization, showing that, for lower pressure values (<100 bar), hematite is formed, while, at pressures >100 bar, the major crystallinephase is goethite.
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Photocatalytic performance and cytotoxic activity of green-synthesized cobalt ferrite nanoparticles
Mina Sarani,Zheng Qin +1 more
TL;DR: In this paper , cobalt ferrite nanoparticles (CoFe2O4 NPs) were prepared using aqueous solution of torajabin followed by calcination at temperatures of 600, 700, and 800 °C.
References
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Journal ArticleDOI
Synthesis and characterization of biocompatible Fe3O4 nanoparticles
TL;DR: The results showed that the Fe3O4 nanoparticles coating by sodium oleate had a better biocompatibility, better magnetic properties, easier washing, lower cost, and better dispersion than the magnetite nanoparticles coated by PEG.
Journal ArticleDOI
Optimal Size of Nanoparticles for Magnetic Hyperthermia: A Combined Theoretical and Experimental Study
B. Mehdaoui,Anca Meffre,Julian Carrey,Sébastien Lachaize,Lise-Marie Lacroix,Michel Gougeon,Bruno Chaudret,Marc Respaud +7 more
TL;DR: In this article, a model system consisting of metallic iron nanoparticles with a size ranging from 5.5 to 28 nm is extensively studied and several features expected theoretically are observed for the first time experimentally: i) the correlation between the nanoparticle diameter and their coercive field, ii) the correlations between the amplitude of the coercive field and the losses, iii) the variation of the optimal size with the amplitude the magnetic field.
Journal ArticleDOI
Influence of dipolar interactions on hyperthermia properties of ferromagnetic particles
David Serantes,Daniel Baldomir,Carlos Martinez-Boubeta,Konstantinos Simeonidis,Mavroeidis Angelakeris,Eva Natividad,Miguel Castro,Arturo Mediano,D.-X. Chen,Alvaro Sanchez,Li. Balcells,Benjamín Martínez +11 more
TL;DR: In this article, the effects of interparticle dipolar interactions on the hysteresis losses were investigated and it was shown that an increase in the intensity of dipolar interaction produced a decrease in the magnetic susceptibility and hystresis loss, thus diminishing the hyperthermia output.
Journal ArticleDOI
Specific Absorption Rates and Magnetic Properties of Ferrofluids with Interaction Effects at Low Concentrations
TL;DR: In this article, the specific absorption rate (SAR) of a maghemite-based ferrofluid, measured at 315 K, 3 kA/m, and 109 kHz, was found to double as the concentration of the magnetite was decreased by a factor of 4.
Journal ArticleDOI
Nanostructural, magnetic and electrical properties of Ag doped Mn-ferrite nanoparticles
TL;DR: In this article, a simple method based on decomposition of metal nitrates in presence of citric acid was used to synthesize nano-crystalline MnFe2−xAgxO4 samples with average grain size of 4-7nm.