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Literatura académica sobre el tema "Ferrite magnetic nanoparticles"

Autor: Grafiati

Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "Ferrite magnetic nanoparticles"

Swaminathan, R., J. Woods, S. Calvin, Joseph Huth y M. E. McHenry. "Microstructural Evolution Model of the Sintering Behaviour and Magnetic Properties of NiZn Ferrite Nanoparticles". Advances in Science and Technology 45 (octubre de 2006): 2337–44. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2337.

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The sintering of RF plasma synthesized NiZn ferrite nanoparticles was studied. The as-synthesized nanoparticles have been modeled as having a core-shell structure with richer Zn concentration on the surface. Most Zn cations occupy tetrahedral sites typical of zinc ferrites, while some of the Zn cations occupy tetrahedral sites in a (111) oriented surface layer in the form of ZnO. Ni and Fe cations show no evidence of such disorder and their positions are consistent with the bulk spinel structure. This core-shell structure evolves by decomposition of the as-synthesized nanoparticles into Ni-and Zn-rich ferrites followed by the decomposition of the Zn-rich ferrites into ZnO and -Fe2O3 during sintering of the nanoparticles. Within the core region, sintering causes Ni to exit the ferrite structure and be reduced to a metallic form, possibly via a NiO intermediate. The miscibility gap in the pseudo-binary ZnFe2O4/NiFe2O4 system was modeled using equilibrium solution data. Decomposition rates are interpreted considering inter-diffusion kinetics. Sintered nanoparticle compacts showed an evolution of a 4- phase mixture of ferrite + ZnO + -Fe2O3 + Ni with increasing sintering temperature. The average ferrite nanoparticle size is preserved up to very high sintering temperatures. These observations suggest that the ZnO shell contributes to the sintering process by surface diffusion while acting as a barrier to the growth of the ferrite core. Metal edge EXAFS patterns of the sintered compacts confirm that Fe transforms from a single ferrite phase into a mixture of -Fe2O3 and ferrite; ZnO content progressively increases with sintering temperature and elemental Ni evolves from the ferrite with increasing sintering temperature. The saturation magnetization and Curie temperature were observed to decrease as a function of sintering temperature, with an anomaly at the temperature where Ni starts to form. This is explained by Zn diffusing from the core depleting the ferrite and increasing the amount of non-magnetic ZnO in the shell. AC magnetic measurements also vary systematically with the microstructural evolution.

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Tambe, Sunanda y R. Y. Borse. "Effects of Al Doping with Zinc Ferrite Nanoparticles on Structural, Magnetic and Dielectric Properties". Material Science Research India 19, n.º 3 (30 de diciembre de 2022): 150–60. http://dx.doi.org/10.13005/msri/190306.

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Zinc ferrite nanoparticles have wide range of the applications in the field of Electronics, Optoelectronics, Magnetics, Solar cell, Photocatalysts. With Al doping we modify their structural, magnetic and electrical properties of zinc ferrite (ZnFe2O4). In the present studies, zinc ferrite nanoparticles were prepared by sol gel method using glycine as combustion agent. The effects of Al doping concentration on the structural, morphological, optical, magnetic and electrical properties of zinc ferrites were studied. In x-ray diffraction patterns analysis confirmed the formation of the cubic spinel structure. We characterise scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) in the current work to examine the morphology of the nanomaterials. The UV-Vis optical investigation showed that Al+3 doping increased absorbance and significantly decreased energy band gap value (1.90 eV-2.01 eV). The magnetic properties of zinc ferrite NPs were studied by using vibrating samples magnetometer which showed samples of pure zinc ferrites and Al-doped zinc ferrite with paramgnetism. Dielectric properties were studied from impedance analyser. When aluminium concentration increases in the zinc ferrites, dielectric characteristic results were obtained in which dielectric constant (ɛ'), dielectric loss (ɛ'') and tangent loss decreased. Also when frequency increases above all three dielectric parameters remains stable at high frequency. The obtained results of pure and Al doped Zn ferrite are useful for high frequency applications.

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Andrade, Priscyla L., Valdeene A. J. Silva, Kathryn L. Krycka, Juscelino B. Leão, I.-Lin Liu, Maria P. C. Silva y J. Albino Aguiar. "The effect of organic coatings in the magnetization of CoFe₂O₄ nanoparticles". AIP Advances 12, n.º 8 (1 de agosto de 2022): 085102. http://dx.doi.org/10.1063/5.0078167.

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Cobalt ferrite has attracted considerable attention in recent years due to its unique physical properties, such as high Curie temperature, large magnetocrystalline anisotropy, high coercivity, moderate saturation magnetization, large magnetostrictive coefficient, and excellent chemical stability and mechanical hardness. This work focuses on the neutron scattering results of the magnetic response characteristics of polysaccharide fucan coated cobalt ferrite nanoparticles for their application as a solid support for enzyme immobilization and other biotechnology applications. Here, we unambiguously show that surfactant coating of nanoparticles can significantly affect their magnetic response throughout the nanoparticle volume. While it has been recently suggested that oleic acid may preserve nanoscale magnetism in ferrites, we present evidence that the influence of oleic acid on the magnetic response of CoFe2O4 nanoparticles is more than a surface effect, instead pervading throughout the interior of the nanoparticle.

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Al-Senani, Ghadah M., Foziah F. Al-Fawzan, Rasmiah S. Almufarij, Omar H. Abd-Elkader y Nasrallah M. Deraz. "Magnetic Behavior of Virgin and Lithiated NiFe2O4 Nanoparticles". Crystals 13, n.º 1 (31 de diciembre de 2022): 69. http://dx.doi.org/10.3390/cryst13010069.

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A series of virgin and lithia-doped Ni ferrites was synthesized using egg-white-mediated combustion. Characterization of the investigated ferrites was performed using several techniques, specifically, X-ray Powder Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and High-resolution transmission electron microscopy (HRTEM). XRD-based structural parameters were determined. A closer look at these characteristics reveals that lithia doping enhanced the nickel ferrite lattice constant (a), unit cell volume (V), stress (ε), microstrain (σ), and dislocation density (δ). It also enhanced the separation between magnetic ions (LA and LB), ionic radii (rA, rB), and bond lengths (A-O and B-O) between tetrahedral (A) and octahedral (B) locations. Furthermore, it enhanced the X-ray density (Dx) and crystallite size (d) of random spinel nickel ferrite displaying opposing patterns of behavior. FTIR-based functional groups of random spinel nickel ferrite were determined. HRTEM-based morphological properties of the synthesized ferrite were investigated. These characteristics of NiFe2O4 particles, such as their size, shape, and crystallinity, demonstrate that these manufactured particles are present at the nanoscale and that lithia doping caused shape modification of the particles. Additionally, the prepared ferrite’s surface area and total pore volume marginally increased after being treated with lithia, depending on the visibility of the grain boundaries. Last, but not least, as the dopant content was increased through a variety of methods, the magnetization of virgin nickel ferrite fell with a corresponding increase in coercivity. Uniaxial anisotropy, rather than cubic anisotropy, and antisite and cation excess defects developed in virgin and lithia-doped nickel ferrites because the squareness ratio (Mr/Ms) was less than 0.5. Small squareness values strongly recommend using the assessed ferrites in high-frequency applications.

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Dhariwal, Jyoti, Ravina Yadav, Sheetal Yadav, Anshu Kumar Sinha, Chandra Mohan Srivastava, Gyandshwar Kumar Rao, Manish Srivastava et al. "Magnetic Spinel Ferrite: An Efficient, Reusable Nano Catalyst for HMFsynthesis". Current Catalysis 10, n.º 3 (diciembre de 2021): 206–13. http://dx.doi.org/10.2174/2211544710666211119094247.

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Aim: In the present work, the preparation and catalytic activity of spinel ferrite (MFe2O4; M = Fe, Mn, Co, Cu, Ni) nanoparticles to synthesize 5-hydroxymethylfurfural (HMF) have been discussed. Background: Ferrites possess unique physicochemical properties, including excellent magnetic characteristics, high specific surface area, active surface sites, high chemical stability, tunable shape and size, and easy functionalization. These properties make them essential heterogeneous catalysts in many organic reactions. Objective: This study aims to synthesize a series of transition metal ferrite nanoparticles and use them in the dehydration of carbohydrates for 5-hydroxymethylfurfural (HMF) synthesis. Method: The ferrite nanoparticles were prepared via the co-precipitation method, and PXRD confirmed their phase stability. The surface area and the crystallite size of the nanoparticles were calculated using BET and PXRD, respectively. Result: The easily prepared heterogeneous nanocatalyst showed a significant catalytic performance, and among all spinel ferrites, CuFe2O4 revealed maximum catalytic ability. Conclusion: Being a heterogeneous catalyst and magnetic in nature, ferrite nanoparticles were easily recovered by using an external magnet and reused up to several runs without substantial loss in catalytic activity. Others: HMF was synthesized from fructose in a good yield of 71%.

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Petrova, Elena G., Yana A. Shavshukova, Dzmitry A. Kotsikau, Kazimir I. Yanushkevich, Konstantin V. Laznev y Vladimir V. Pankov. "Thermolysis of sprayed suspensions for obtaining highly spinel ferrite nanoparticles". Journal of the Belarusian State University. Chemistry, n.º 1 (21 de febrero de 2019): 14–21. http://dx.doi.org/10.33581/2520-257x-2019-1-14-21.

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Thermal treatment of ferrite magnetic nanoparticles in NaCl matrix gives an opportunity to increase their specific magnetization with preservation of nanoscale size. Composite materials based on mixed ferrites Co0.65Zn0.35Fe2O4 and Mg 0.5Zn0.5Fe2O4 were synthesized by spray-drying of aqueous suspensions in presence of NaCl and annealed at 300 –900 °C. The microstructure and phase composition of nanoparticles before and after annealing were studied by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction analysis and IR spectroscopy. The magnetic properties of nanoparticles were estimated using a ponderomotive method of measuring the specific magneti zation at room temperature in a magnetic field with an induction of 0.86 T. The increase of the annealing temperature up to 900 °C was established to lead to the increase in the specific magnetization of ferrites – from 32.79 to 91.3 emu/g (Co0.65Zn0.35Fe2O4) and from 2.76 to 22.31 emu/g (Mg 0.5 Zn 0.5Fe2O4) due to recrystallization processes and increase of crystallinity degree of the ferrites. Due to the NaCl insulating layer, the particle size increases just slightly (from ~ 10 nm before annealing to ~ 60 nm after annealing at 900 °C). This method is effective for substantial increase in specific magnetization of ferrite nanoparticles with preservation of their nanoscale size.

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JIAO, QIGANG, YI ZHANG, YA ZHAI, XIAOJUN BAI, WEI ZHANG, JUN DU y HONGRU ZHAI. "MAGNETIC PROPERTIES AND INDUCTION HEATING OF NiZn FERRITE NANOPARTICLES". Modern Physics Letters B 22, n.º 15 (20 de junio de 2008): 1497–505. http://dx.doi.org/10.1142/s0217984908016212.

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A series of nanoparticle powders of Ni x Zn 1-x Fe 2 O 4 (x = 0, 0.30, 0.40, 0.50, 0.55, 0.60, 0.70 and 1.0) ferrites was synthesized by the refluxing method at relatively low temperatures. The average size of nanoparticles is about 20 nm. The magnetic properties and induction heating behavior were investigated. On increasing the Ni content, x, from 0 to 0.50, the saturation magnetization and permeability increased, and then decreased with further increasing Ni content with the bulk Ni – Zn ferrite. The maximum value of magnetization was about 50 emu/g near x = 0.50, where the induction heating rate and induction heating final temperature of the ferrite-water suspension also showed maximum values. The specific absorption rate obtained from the initial induction heating rate curve was found to be linearly proportional to the square of the alternating magnetic field, which is roughly consistent with the theoretical power loss of magnetic materials in the alternating field.

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Andrade, Raquel G. D., Sérgio R. S. Veloso y Elisabete M. S. Castanheira. "Shape Anisotropic Iron Oxide-Based Magnetic Nanoparticles: Synthesis and Biomedical Applications". International Journal of Molecular Sciences 21, n.º 7 (1 de abril de 2020): 2455. http://dx.doi.org/10.3390/ijms21072455.

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Research on iron oxide-based magnetic nanoparticles and their clinical use has been, so far, mainly focused on the spherical shape. However, efforts have been made to develop synthetic routes that produce different anisotropic shapes not only in magnetite nanoparticles, but also in other ferrites, as their magnetic behavior and biological activity can be improved by controlling the shape. Ferrite nanoparticles show several properties that arise from finite-size and surface effects, like high magnetization and superparamagnetism, which make them interesting for use in nanomedicine. Herein, we show recent developments on the synthesis of anisotropic ferrite nanoparticles and the importance of shape-dependent properties for biomedical applications, such as magnetic drug delivery, magnetic hyperthermia and magnetic resonance imaging. A brief discussion on toxicity of iron oxide nanoparticles is also included.

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Iacovita, Cristian, Gabriela Fabiola Stiufiuc, Roxana Dudric, Nicoleta Vedeanu, Romulus Tetean, Rares Ionut Stiufiuc y Constantin Mihai Lucaciu. "Saturation of Specific Absorption Rate for Soft and Hard Spinel Ferrite Nanoparticles Synthesized by Polyol Process". Magnetochemistry 6, n.º 2 (29 de mayo de 2020): 23. http://dx.doi.org/10.3390/magnetochemistry6020023.

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Spinel ferrite nanoparticles represent a class of magnetic nanoparticles (MNPs) with enormous potential in magnetic hyperthermia. In this study, we investigated the magnetic and heating properties of spinel soft NiFe2O4, MnFe2O4, and hard CoFe2O4 MNPs of comparable sizes (12–14 nm) synthesized by the polyol method. Similar to the hard ferrite, which predominantly is ferromagnetic at room temperature, the soft ferrite MNPs display a non-negligible coercivity (9–11 kA/m) arising from the strong interparticle interactions. The heating capabilities of ferrite MNPs were evaluated in aqueous media at concentrations between 4 and 1 mg/mL under alternating magnetic fields (AMF) amplitude from 5 to 65 kA/m at a constant frequency of 355 kHz. The hyperthermia data revealed that the SAR values deviate from the quadratic dependence on the AMF amplitude in all three cases in disagreement with the Linear Response Theory. Instead, the SAR values display a sigmoidal dependence on the AMF amplitude, with a maximum heating performance measured for the cobalt ferrites (1780 W/gFe+Co), followed by the manganese ferrites (835 W/gFe+Mn), while the nickel ferrites (540 W/gFe+Ni) present the lowest values of SAR. The heating performances of the ferrites are in agreement with their values of coercivity and saturation magnetization.

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Alzoubi, Gassem M. "The Effect of Co-Doping on the Structural and Magnetic Properties of Single-Domain Crystalline Copper Ferrite Nanoparticles". Magnetochemistry 8, n.º 12 (22 de noviembre de 2022): 164. http://dx.doi.org/10.3390/magnetochemistry8120164.

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Nanoparticles of Co-doped copper ferrite, Cu0.75Co0.25Fe2O4, were successfully synthesized by hydrothermal method. The preparation conditions were optimized to produce small nanoparticles with crystallite size of 20 nm that fall into the single-domain regime. The influence of Co-doping on the structure and magnetic properties of pure copper ferrite, CuFe2O4, was investigated. The prepared ferrite nanoparticles were found to be in a single structural phase with a spinel-type structure, according to the XRD and FT-IR measurements. When compared to pure Cu ferrite, the addition of Co increased the lattice constant and decreased the density. The TEM results confirmed the spherical morphology of the prepared ferrite nanoparticles. For the entire temperature range of the ferrite nanoparticles, the magnetization measurements showed a single ferrimagnetic phase. It was observed that the coercivity and remanent magnetization increased with decreasing temperature. Magnetic anisotropy was found to increase with Co-doping in comparison to pure Cu ferrite. The ZFC–FC magnetization curves showed that the blocking temperature (TB) of the prepared nanoparticles is above room temperature, demonstrating that they are ferrimagnetic at room temperature and below. Additionally, it was found that decreasing the magnetic field lowers TB. The FC curves below TB were observed to be nearly flat, indicating spin-glass behavior that might be attributed to nanoparticle interactions and/or surface effects such as spin canting and spin disorder.

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Tesis sobre el tema "Ferrite magnetic nanoparticles"

Han, Man Huon. "Development of synthesis method for spinel ferrite magnetic nanoparticle and its superparamagnetic properties". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26465.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009.
Committee Chair: Z. John Zhang; Committee Member: Angus Wilkinson; Committee Member: C P Wong; Committee Member: E. Kent Barefield; Committee Member: Mostafa El-Sayed. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Anderson, Richard M. "Magneto-optical properties of superparamagnetic spinel ferrite nanoparticles". Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/30027.

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Vestal, Christy Riann. "Magnetic couplings and superparamagnetic properties of spinel ferrite nanoparticles". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-06072004-131405/unrestricted/vestal%5Fchristy%5Fr%5F200405%5Fphd.pdf.

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Rondinone, Adam Justin. "Superparamagnetic relaxation dynamics of magnetic spinel ferrite nanoparticles". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/30958.

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Chen, Ritchie. "Optimizing hysteretic power loss of magnetic ferrite nanoparticles". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81064.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2013.
Cataloged from PDF version of thesis. "June 2013."
Includes bibliographical references (p. 44-46).
This thesis seeks to correlate hysteretic power loss of tertiary ferrite nanoparticles in alternating magnetic fields to trends predicted by physical models. By employing integration of hysteresis loops simulated from physical models for single-domain ferromagnets, we have identified ferrite materials optimal for remote heating. Several organometallic thermal decomposition methods were adapted to synthesize nanoparticles with anisotropy energies varying over 3 orders of magnitude and transferred into water using a high-temperature ligand exchange protocol. Furthermore, we compare nanoparticles of the same composition and size produced via different synthesis conditions and highlight differences in their materials properties. These analyses identify the synthesis conditions that yield nanoparticles with optimized magnetic properties and with some of the highest power dissipation (specific loss power) found in literature for tertiary ferrite materials.
by Ritchie Chen.
S.M.

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Dondero, Russell A. "Silica coating of spinel ferrite nanoparticles". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/27375.

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Aygar, Gulfem. "Preparation Of Silica Coated Cobalt Ferrite Magnetic Nanoparticles For The Purification Of Histidine-tagged Proteins". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613894/index.pdf.

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The magnetic separation approach has several advantages compared with conventional separation methods
it can be performed directly in crude samples containing suspended solid materials without pretreatment, and can easily isolate some biomolecules from aqueous systems in the presence of magnetic gradient fields. This thesis focused on the development of new class of magnetic separation material particularly useful for the separation of histidine-tagged proteins from the complex matrixes through the use of imidazole side chains of histidine molecules. For that reason surface modified cobalt ferrite nanoparticles which contain Ni-NTA affinity group were synthesized. Firstly, cobalt ferrite nanoparticles with a narrow size distribution were prepared in aqueous solution using the controlled coprecipitation method. In order to obtain small size of agglomerates two different dispersants, oleic acid and sodium chloride, were tried. After obtaining the best dispersant and optimum experimental conditions, ultrasonic bath was used in order to decrease the size of agglomerates. Then, they were coated with silica and this was followed by surface modification of these nanoparticles by amine in order to add functional groups on silica shell. Next, &ndash
COOH functional groups were added to silica coated cobalt ferrite magnetic nanoparticles through the NH2 groups. After that N&alpha
,N&alpha
-Bis(carboxymethyl)-L-lysine hydrate, NTA, was attached to carboxyl side of the structure. Finally, nanoparticles were labeled with Ni (II) ions. The size of the magnetic nanoparticles and their agglomerates were determined by FE-SEM images, particle size analyzer, and zeta potential analyzer (zeta-sizer). Vibrational sample magnetometer (VSM) was used to measure the magnetic behavior of cobalt ferrite and silica coated cobalt ferrite magnetic nanoparticles. Surface modifications of magnetic nanoparticles were followed by FT-IR measurements. ICP-OES was used to find the amount of Ni (II) ion concentration that was attached to the magnetic nanoparticle.

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Cripps, Chala Ann. "Synthesis and characterization of cobalt ferrite spinel nanoparticles doped with erbium". Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/30855.

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Heintz, Eva Liang-Huang. "Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles". Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4944.

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Surface Biological Modification and Cellular Interactions of Magnetic Spinel Nanoparticles Eva Liang-Huang Heintz 191 Pages Directed by Dr. Z. John Zhang The interest in magnetic nanoparticles is multi-dimensional. Fundamentally, it is important to be able to control their magnetic properties and to correlate to specific applications. In biology, magnetic nanoparticles offer promising potential as magnetic carriers or chaperones for magnetic localization and manipulation of therapeutic reagents. The synthesis of superparamagnetic CoFe2-xSmxO4 nanoparticles and the tunability of their magnetic properties by size and composition variations are discussed. An increase in size of CoSm0.19Fe1.81O4 nanoparticles produced an increase in blocking temperature and saturation magnetization, but a non-linear coercitivity response was observed with change in size. By varying the composition, the saturation magnetization of CoFe2-xSmxO4 decreased dramatically while the coercitivity increased when compared to native cobalt spinel ferrite (CoFe2O4) nanoparticles. These results demonstrate how the magnetic properties of cobalt spinel ferrite nanoparticles can be tailored to specific applications. Surface modifications of cobalt spinel ferrite nanoparticles facilitated the conjugation of oligonucleotides. Using a transfection reagent, CoFe2O4 ??igonucleotide conjugates were delivered into mammalian cells. Post transfection, synchronized movement of cells in response to an external magnetic field was observed. This demonstrated the possibility of magnetic manipulation and localization of therapeutic reagents coupled to CoFe2O4 magnetic nanoparticles. Results from this thesis demonstrate the potential role of magnetic spinel nanoparticles in cell biology and will facilitate the progress towards in vivo testing.

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MAMELI, VALENTINA. "Colloidal CoFe2O4-based nanoparticles for Magnetic Fluid Hyperthermia". Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266766.

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In the field of biomedicine, important issues to address are the early-stage diagnosis and targeted therapies. Since the last two decades, magnetic nanoparticles have been proposed as potentially powerful due to their unique chemical-physical properties. Magnetic nanoparticles can be applied in a wide variety of biomedical fields from the magnetic separation and Magnetic Resonance Imaging (MRI) to drug delivery and Magnetic Fluid Hyperthermia (MFH).1 In particular, MFH is based on the heat released by magnetic nanoparticles subjected to an alternate external magnetic field. Among the different material features affecting the hyperthermic efficiency, the magnetic properties are clearly the most important. Therefore, the optimisation of the magnetic properties, aimed to increase the heating ability and to reduce the magnetic material dose to be inserted in the human body, is still an active research field. In 2013 alone, 682 works have been published in the literature on the topic of magnetic hyperthermia.2 Despite cobalt toxicity, cobalt-containing materials and especially cobalt ferrite nanoparticles have been proposed as promising heat mediators due to its high anisotropy.3–13 In this thesis, the results obtained on two different systems, designed with the idea of studying the effect on the hyperthermic properties of proper tuning of the magnetic properties, are presented. Both the sets of samples are based on cobalt ferrite nanoparticles. The first strategy consists on the substitution of cobalt ions with zinc ones with the aim of tuning the magnetic properties of the system and, at the same time, decrease the toxicity of the material. The second way is on the contrary represented by the coating of cobalt ferrite cores by means of biocompatible or less toxic isostructural phases (i.e. magnetite/maghemite or manganese ferrite).

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Libros sobre el tema "Ferrite magnetic nanoparticles"

Superparamagnetic iron oxide nanoparticles: Synthesis, surface engineering, cytotoxicity, and biomedical applications. New York: Nova Science Publishers, 2011.

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Functional Materials: Fundamental Research and Industrial Application. Trans Tech Publications, Limited, 2021.

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Capítulos de libros sobre el tema "Ferrite magnetic nanoparticles"

Irfan Hussain, M., Min Xia, Xiao-NaRen, Kanwal Akhtar, Ahmed Nawaz, S. K. Sharma y Yasir Javed. "Ferrite Nanoparticles for Biomedical Applications". En Magnetic Nanoheterostructures, 243–65. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39923-8_7.

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Je, Hae June y Byung Kook Kim. "Magnetic Properties of Mn-Zn Ferrite Nanoparticles Fabricated by Conventional Ball-Milling". En Solid State Phenomena, 891–94. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.891.

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Balavijayalakshmi, J. y T. Sudha. "Effect of Cobalt Substitution on Structural and Magnetic Properties of Magnesium Ferrite Nanoparticles". En Springer Proceedings in Physics, 289–97. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44890-9_27.

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Sankaran, K. J., U. Balaji y R. Sakthivel. "Magnetic and LPG Sensing Properties of Nickel Ferrite Nanoparticles Derived from Metallurgical Wastes". En Lecture Notes in Mechanical Engineering, 257–64. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-7264-5_19.

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Sreeja, V., S. Vijayanand, S. Deka y P. A. Joy. "Magnetic and Mössbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method". En ICAME 2007, 271–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-78697-9_32.

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Swaminathan, R., J. Woods, S. Calvin, J. Huth y M. E. McHenry. "Microstructural Evolution Model of the Sintering Behaviour and Magnetic Properties of NiZn Ferrite Nanoparticles". En Advances in Science and Technology, 2337–44. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908158-01-x.2337.

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Neelima, G., K. Lakshmi y K. Sesha Maheswaramma. "In Silico Studies of Benzoxazole Derivatives Using Ferrite-L-cysteine Magnetic Nanoparticles: Green Synthesis". En Special Publications, 288–301. Cambridge: Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781839160783-00288.

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Balavijayalakshmi, J. y C. Annie Josphine. "Impact of Annealing on Structural and Magnetic Properties of Manganese Co-Doped Magnesium-Cobalt Ferrite Nanoparticles". En Springer Proceedings in Physics, 233–43. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44890-9_22.

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Singh, Ashtosh Kumar, M. G. H. Zaidi y Rakesh Saxena. "DC Electrical Conductivity and Magnetic Behaviour of Epoxy Matrix Composites Impregnated with Surface-Modified Ferrite Nanoparticles". En Advances in Materials Engineering and Manufacturing Processes, 69–77. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4331-9_7.

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Thomas, Bintu y L. K. Alexander. "Ferrite-Based Magnetic Nanoparticle Heterostructures for Removal of Dyes". En Sustainable Textiles: Production, Processing, Manufacturing & Chemistry, 213–31. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0882-8_7.

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Actas de conferencias sobre el tema "Ferrite magnetic nanoparticles"

Gutierrez, Gustavo, Juan Catan˜o y Oscar Perales-Perez. "Development of a Magnetocaloric Pump Using a Mn-Zn Ferrite Ferrofluid". En ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13784.

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Magnetic fluids or ferrofluids are colloidal dispersions of magnetic nanoparticles in a liquid carrier. These nanoparticles have a specific size range in order to remain suspended in the liquid, about 3 to 15 nm. In this range Brownian motion (thermal molecular motion in the liquid) keeps the particles from settling out. Because magnetic particles tend to aggregate, and aggregates sediment faster than single particles, the particles are coated with a stabilizing dispersing agent. The surfactant must be matched to the carrier type and must overcome the attractive Van der Waals and magnetic forces between the particles to prevent agglomeration even when a strong magnetic field is applied to the ferrofluid. A device that can pump a fluid with no moving mechanical parts represents a very encouraging alternative since such device would be practically maintenance free. A magnetocaloric pump achieves this purpose by providing a pressure gradient to a ferrofluid placed inside a magnetic field while experiencing a temperature change. If the temperature change is produced by extracting heat out of an element that needs refrigeration, coupling this heat via a heat pipe with the magnetocaloric pump will result in a completely passive cooling system. For applications near ambient temperature the ferrofluid must have specific characteristics such as low Curie temperature, high pyromagnetic coefficient, high thermal conductivity and low viscosity. This work presents the detailed description of the synthesis of ferrofluids composed of Mn-Zn ferrite nanoparticles and the characterization of its magnetic and thermal properties. Different composition of Mn-Zn ferrites nanoparticles were produce and evaluated. This ferrite ferrofluid was compared with commercially available magnetite ferrofluid in a magnetocaloric pump prototype. Results of saturation magnetization, pyromagnetic coefficient, Curie temperature, particle size, viscosity and pressure increment inside the magnetocaloric pump are presented.

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Shahane, G. S., Ashok Kumar, R. P. Pant, Krishan Lal, P. K. Giri, D. K. Goswami, A. Perumal y A. Chattopadhyay. "Structural And Magnetic Properties Of Ni-Zn Ferrite Nanoparticles". En INTERNATIONAL CONFERENCE ON ADVANCED NANOMATERIALS AND NANOTECHNOLOGY (ICANN-2009). AIP, 2010. http://dx.doi.org/10.1063/1.3504329.

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Karan, T., S. Ram y R. K. Kotnala. "Magnetic properties of carbon stabilized multiferroic bismuth ferrite nanoparticles". En SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710046.

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Mahale, Vinay A., A. V. Raut, R. C. Alange, D. R. Sapate, P. S. Aghav y R. G. Dorik. "Synthesis, structural and magnetic properties of Mg0.6Zn0.4Fe2O4 ferrite nanoparticles". En NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0061099.

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Gomez-Polo, C., S. Larumbe, J. Beato-Lopez, E. Mendonca, C. De Meneses y J. Duque. "Self-regulated magnetic induction heating Of Zn-Co ferrite nanoparticles". En 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7157443.

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Asmatulu, R., A. Garikapati, H. E. Misak, Z. Song, S. Y. Yang y P. Wooley. "Cytotoxicity of Magnetic Nanocomposite Spheres for Possible Drug Delivery Systems". En ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40269.

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Cytotoxicity test is a rapid and standardized in vitro method to determine the harmful effects of materials used for biomedical purposes, such as drug carriers, implants and their coatings, biosensors and surgical/medical devices. In the present study, sol-gel driven nickel ferrite (NiFe2O4) and cobalt ferrite (CoFe2O4) nanoparticles (10–25 nm) at different concentrations were incorporated into biodegradable polymer, poly(lactic-co-glycolic acid) (PLGA), using oil-in-oil emulsion/solvent evaporation technique, and then the cytotoxicity of magnetic nanocomposite spheres was characterized using raw cells. The test provides the toxicity of the products prior to their real applications, which may limit animal experimentation, remove potential toxic compounds and reduce the downstream costs. The cytotoxicity results showed that both magnetic nanocomposite spheres were toxic at some degree to the raw cells; however, the cobalt ferrite nanoparticles in nanocomposite spheres are more toxic than the nickel ferrite nanoparticles.

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Xavier, Sheena, Dhanya Jose, Sona George y K. V. Alekha. "Structural and magnetic characterization of transition metal substituted ferrite nanoparticles". En INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS: STAM 20. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017047.

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Sugimoto, Seiichi, Kazuo Yagi, Yujiro Harada y Masataka Tokuda. "Synthesis and Magnetic Properties of New Multi-components Spinel Ferrite Nanoparticles". En 2007 International Symposium on Micro-NanoMechatronics and Human Science. IEEE, 2007. http://dx.doi.org/10.1109/mhs.2007.4420915.

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Argish, V., M. Chithra, C. N. Anumol, B. N. Sahu y S. C. Sahoo. "Magnetic studies of magnesium ferrite nanoparticles prepared by sol-gel technique". En NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4917736.

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Jadoun, Priya, Jyoti, B. L. Prashant, S. N. Dolia, D. Bhatnagar y V. K. Saxena. "Magnetic and dielectric behavior of chromium substituted Co-Mg ferrite nanoparticles". En INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2015): Proceeding of International Conference on Condensed Matter and Applied Physics. Author(s), 2016. http://dx.doi.org/10.1063/1.4946319.

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