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Showing 1 to 20 of 96 for “"Fe3O4"”.
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Investigation Of Temperature Dependent Magnetic Hyperthermia In Fe3o4 Ferrofluids
<p>Magnetic nanoparticles (MNPs) of Fe3O4 and gamma-Fe2O3 have been exploited in the biomedical fields for imaging, targeted drug delivery and magnetic hyperthermia. Magnetic hyperthermia (MHT), the production of heat using ferrofluids, colloidal suspensions of MNPs, in an external AC magnetic …
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Half metallic Fe3O4 : An experimental study on impurity doping and the giant magnetoresistance effect
… the effects of impurity doping on half metallic Fe3O4 films to explore new magnetic materials, and subsequently investigates the giant magnetoresistance (GMR) phenomenon in Fe3O4 incorporated multilayers and granular systems for potential applications in oxide spintronics. A systematic analysis …
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PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry
… glycol (PEG) surface coating on magnetite (Fe3O4) nanoparticles. The PPBT/PEG system will be utilized in this work, which takes a closer look at the active material, Fe3O4, and examines the effects of surface chemistry and crystallite size (10 nm vs. 20 nm) on battery performance. Variations …
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Modelagem microcinética e estimação de parâmetros da hidrogenólise do glicerol sobre catalisador de Pt/Fe3O4
… a partir da utilização de um catalisador de Pt/Fe3O4. Baseando-se no modelo de Langmuir-Hinshelwood-Hougen-Watson, foi proposto um mecanismo para esta reação sem considerar nenhuma etapa elementar como etapa controladora da reação ou em equilíbrio termodinâmico. Apesar dos parâmetros não …
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The Functionalization of Magnetic Fe3O4@TiO2 by Molecular Motif for the Detection of Mercury (II)
… surface of the coated magnetite microspheres (L-Fe3O4@TiO2) through a siloxane template layer and was fully characterized using thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). Detailed emission studies showed the ability of the L and L-Fe3O4@TiO2 not only effectively …
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Phase Relations and Thermodynamic Properties of Spinelloid Phases in the System Mg2SiO4–Fe2SiO4–Fe3O4 at high Temperatures and Pressures
Experiments in the system Mg2SiO4–Fe2SiO4–Fe3O4 produced three spinelloid polytypes that are stable between 4 and 9 GPa and 1100°C. Spinelloid II is the first intermediate phase to appear at low pressures in Mg-poor compositions. With increasing pressure spinelloid II is replaced by an isochemical …
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A study of functionalized iron oxide nanoparticles for selective recognition of kappa-casein: a breast cancer biomarker.
… In this research, functionalized iron oxide (Fe3O4) nanoparticles were used for selective recognition of kappa casein (kcn) a breast cancer biomarker. The Fe3O4 was synthesized by the co-precipitation method. The particles were then coated with a polyacrylamide film which was subsequently …
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Synthesis and characterization of polyaniline/magnetite nanocomposites for fabrication of nanofiber textile
… as polyaniline/magnetite nanocomposites (PAni/Fe3O4) can be manipulated through various treatments in fabricating desire material such as nanofibers textile for many applications. The modified magnetite (Fe3O4) nanoparticles were successfully synthesized and incorporated into polyaniline at …
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Surface Structure/Property Relationship for (001) Surface of Magnetite
Magnetite (Fe3O4), a well-known magnetic material, is still attracting intense study because of its great application in catalyst and technology development. These useful properties are related to the coexistence and coupling of several degrees of freedom, including charge, lattice, orbital and …
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Manipulation and Characterization of Morphology and Composition in Mono- and Heterometallic Nanoparticles
… or plasmonics. The synthetic development of FePt@Fe3O4 by the thermal decomposition of Fe(CO)5 upon a preformed FePt seed with enhanced Fe3O4 shell thickness control whilst avoiding the primary-nucleation of Fe3O4 impurities was achieved. The coating of non-magnetic Pt cores established that a …
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Synthesis and Characterization of Novel Functional Materials based on Cellulose and Graphene Oxide
… facial, simple, and scalable method to form Fe3O4 nanoparticles onto cellulose/GO hydrogels. XRD, FTIR, XPS and TEM indicated that Fe3O4 nanoparticles with good dispersion and uniform size are successfully coated on cellulose matrix and GO sheets. This material was tested as catalyst for the …
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Design of silica-based sustainable biomaterial adsorbents from agricultural waste for the microextraction and adsorptive removal of insecticides and antibiotics from wastewater samples
… into silica-based magnetic nanocomposites (Fe3O4@SiO2), thereby converting low-value biomass into functional adsorbents while reducing waste disposal burdens. Guided by green chemistry principles, these cost-effective and eco-friendly materials are used for the extraction and adsorption of …
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Synthesis, Characterisation and Antifungal Activity of Copper(II)-Functionalised Silicone Polymers and Silicone-Coated Magnetic Nanoparticles
… as a surface coating on magnetite nanoparticles (Fe3O4-MNPs). Copper(II) ions were coordinated to the pendant amine groups of all of the polymers. In vitro tests using the fungal pathogen, Candida albicans, revealed that the silicone polymers, their Cu(II) complexes and the Schiff base salicylate …
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The production of pure hydrogen with simultaneous capture of carbon dioxide
… bed of iron and its oxides, viz. Fe, Fe0:947O, Fe3O4 and Fe2O3, has been formulated to produce separate, pure streams of H2 and CO2. The process is exothermic and has the following stages: 1. Reduction of Fe2O3 to Fe0:947O or Fe in syngas (CO + H2) from gasifying coal or biomass. This stage …
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Unsteady blood flow in the stenosed artery subjected to magnetic field and injected nanoparticles
… due to drug carriers such as nanoparticles (Fe3O4, TiO2, Cu) was modelled. In the first problem, the non-dimensional equation was solved by combining both perturbation and power series methods. However, for the second problem, only the perturbation method was used. The MATHCAD software was …
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Untersuchung zur Adsorption und Photochemie von Wasser an geordneten Eisenoxid-Filmen als Modellsystem von Elementarprozessen der Atmosphärenchemie an Staubpartikeln
… von Wasser auf den Eisenoxiden FeO(111), Fe3O4(111) und Fe2O3biphase mittels LEED-Spektroskopie, FT-IR-Spektroskopie, TD-Spektroskopie und isothermer TD-Spektroskopie untersucht. Dabei interessierte insbesondere das Aufwachsverhalten bei 110K im niedrigen Bedeckungsbereich bis zur …
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APPLICATION OF LAYERED DOUBLE HYDROXIDES IN SOLID-PHASE EXTRACTION
… derivants (e.g., layered double oxide (LDO), Fe3O4@LDO, Fe3O4@LDH, (EDTA-Ni)-LDH), with different structures and properties, in some special and new SPE modes (e.g., dispersive solid-phase extraction (DSPE), co-precipitation extraction, in-syringe DSPE, automated DSPE) to improve the …
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Surface and Interface Magnetism in Nanostructures and Thin Films
… the magnetic anisotropy of materials. Au and Fe3O4 synthesized together into three different nanoparticle configurations and ranging in size for 60 nm down to 9nm are used to study how the size, shape, and interfaces affect the most fundamental properties of magnetism in the Au-Fe3O4 system. …
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Nanocrystalline Transition Metal Ferrites Synthesis, Characterization and Surface Functionalization
… This hypothesis was verified in the case of the Fe3O4 nanoparticles: their sizes vary from 5.7 nm when the reaction is performed in neat diethylene glycol to 16.8 nm in N-methyl diethanolamine (NMDEA), whereas a 1:1 (%wt) mixture of these solvents yields nanocrystals with an average size of and …
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Thermal, electrical and mechanical properties of three-dimensional functional materials
… crystals as the template. Especially, the Fe3O4 was epitaxially grown through the complex 3D colloidal templates, after which the single crystal Fe3O4 3D porous structures were obtained. These materials have the multiple nanosized 3D interfaces to deter the phonon transport, and at the same …
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