Synthesis, Properties, and Applications of Iron Nanoparticles
and (2015) Synthesis of Chitosan Coated Iron Oxide (Fe3O4) Nanoparticles by Electrochemical Method. BTech thesis.
Ca alginate as scaffold for iron oxide nanoparticles synthesis
Iron oxides have attracted a great deal of attention among specialists because of their multivalent oxidation states. The β-iron oxide nanoparticles have been synthesized by adding a leaf extract into the aqueous solution of ferric chloride. The synthesized nanoparticles were characterized by Ultra Violet - Visible spectrum (UV-Vis), X-Ray diffraction (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), and Fourier Transform Infra Red spectroscopy (FT-IR). TEM and SEM image shows the nanostructures of prepared iron oxide nanoparticles. The XRD and UV-Vis spectrum confirmed the prepared iron oxide nanoparticles β in phase. [DOI: 10.1380/ejssnt.2014.363]
We report on the synthesis of highly monodisperse iron nanoparticles, using a chemical reduction method. Iron nanoparticles with an average diameter of 6 nm and a geometric standard deviation of 1.3 were synthesized at a pH of 9.50 from ferric chloride precursor with sodium borohydride as the reducing agent, polyacrylic acid as the dispersing agent, and palladium ions as seeds for iron nanoparticle nucleation. The resulting nanoparticles were ferromagnetic at 5 K and superparamagnetic at 350 K. The dispersing agent polyacrylic acid (PAA) was shown to prevent iron nanoparticles and possibly palladium clusters from aggregating; in the absence of PAA, only aggregated iron nanoparticles were obtained. The addition of palladium ions decreased the diameter of iron nanoparticles presumably by providing sites for heterogeneous nucleation onto palladium clusters. In the absence of palladium ions, the mean diameter of iron nanoparticles was approximately 110 nm and the standard deviation increased to 2.0. The pH of the solution also was found to have a significant effect on the particle diameter, likely by affecting PAA ionization and altering the conformation of the polymer chains. At lower pH (8.75), the PAA is less ionized and its ability to disperse palladium clusters is reduced, so the number of palladium seeds decreases. Therefore, the resulting iron nanoparticles were larger, 59 nm in diameter, versus 6 nm for nanoparticles formed at a pH of 9.50.
Magnetic iron oxide nanoparticles: Synthesis and applications
The increased interest in hybrid nanomaterials is due to the combined uses of the unique properties of both organic and inorganic component in a single material. In this class, magnetic polymer nanomaterials are of major interest because of the combination of excellent magnetic properties, stability, and good biocompatibility. Iron oxide nanoparticles can be utilized for multiple biotechnological and biomedical applications, but the major drawbacks of using these nanoparticles is their low stability and uneven size distribution due to the formation of agglomerates in aqueous solution. Thus, for application in various processes, iron oxide nanoparticles are coated with biocompatible polymers, mostly polysaccharides. The size plays an important role in the chemical and kinetic processes involved in the procedure. The final size of the coated particle is determined by the type of coating undertaken for modification of the surface properties according to the application it would be used for. The coated magnetic nanoparticles should enable localization of particles to a pre-defined area. It should be able to bind to the desired compound in such a manner that it can be controlled using an external magnetic field. In the current study, magnetic Fe3O4–chitosan nanoparticles were prepared by the covalent binding of chitosan (CTS) onto the surface of magnetic Fe3O4 nanoparticles which were prepared by electrochemical synthesis. The study aimed at the optimization of the electrochemical synthesis of iron oxide nanoparticles, their subsequent coating with chitosan and their utilization in environmental and biomedical applications.
Sophie Laurent was born in 1967. Her studies were performed at the University of Mons-Hainaut (Belgium), where she received her Ph.D. degree in chemistry in 1993. She joined then Prof. R. N. Muller’s team and was involved in the development (synthesis and physicochemical characterization) of paramagnetic Gd complexes and super paramagnetic iron oxide nanoparticles as contrast agents for MRI. She is currently working on the vectorization of contrast agents for molecular imaging.
Magnetic iron oxide nanoparticles: Synthesis and …
Magnetism being one of the oldest scientific disciplines has been continuously studied since 6th century BC, which still offers scientific innovations today in realm of nanomagnetism. Iron oxide nanomaterials have been growing excessive importance because of their magnetic characteristics and wide applications. Iron oxides magnetic nanoparticles with appropriate surface chemistry are prepared either by wet chemical method such as colloid chemical or sol-gel methods or by dry processes such as vapour deposition techniques. This review summarizes comparative and brief study of the methods for the preparation of iron oxide magnetic nanoparticles with a control over the size, morphology and the magnetic properties. Applications of microwave irradiation for magnetic particle synthesis are also addressed.
We report on the effect of using decanoic acid as capping ligand on the synthesis of iron oxide nanoparticles by thermal decomposition of an organic iron precursor in organic medium. This procedure allowed us to control the particlesizewithin5nmandabout30nmbymodifyingtheprecursor-to-cappingligandratioinasystematicfashionand to further expand the particle size range up to about 50 nm by adjusting the final synthesis temperature. The nanoparticles also showed high saturation magnetization of about 80-83 emu/g at low temperature, almost sizeindependent and close to the value for the bulk counterpart. Decanoic acid-coated nanoparticles were transferred to water by using tetramethylammonium hydroxide, which allowed further coating with silica in a tetraethyl orthosilicate solution. Consequently, these iron oxide nanoparticles are tunable in size and highly magnetic, and they could become suitable candidates for various biomedical applications such as contrast agents for magnetic resonance imaging and magnetic carriers for drug delivery.
Synthesis of iron nanoparticles from hemoglobin and myoglobin.
Green Synthesis of Iron Nanoparticles | Sadieh Abu …
We report on the synthesis of highly monodisperse iron nanoparticles, using a chemical reduction method
Magnetic iron oxide nanoparticles: synthesis and applications
Green synthesis of iron nanoparticles - Download as PDF File (.pdf), Text File (.txt) or read online.
Controlled Synthesis of Iron Oxide Nanoparticles over …
Magnetic iron oxide nanoparticles: Synthesis and surface coating techniques for biomedical applications
Magnetic Iron Oxide Nanoparticles: Chemical Synthesis …
Delphine Forge was born in 1982 in Belgium. Her studies were performed at the University of Mons-Hainaut, where she received her Master’s degree in chemistry in 2004. At present, she is in the third year of her thesis at the NMR laboratory in the group of Professor Robert. N. Muller. Her research interests are in the optimization of the synthesis of iron oxide nanoparticles for different applications, such as MRI contrast agents, hyperthermia, cell labeling, etc. Her expertise covers the synthesis of magnetite and physical characterization methods, such as magnetometry and relaxometry, to understand the role of the different factors on the size of the nanoparticles.
Synthesis of Carbon Encapsulated Iron Nanoparticles …
Melnyczuk,Soubantika Palchoudhury,Synthesis and Characterization of Iron Oxide Nanoparticles: Engineering,IGI Global,Book Chapter,Engineering,Engineering Education,Engineering Science Reference,Materials Science">
Synthesis of Iron Oxide Nanoparticles by Using …
Figure 1 shows some transmissionelectron microscopy(TEM) images ofthe as-synthesized ironoxide nanoparticles for different iron(I) acetylacetonate-to-decanoic acid molar ratios. For the smallest ratio (1:6), pseudospherical particles of about 5 nm in diameter were obtained, which tend to self-assemble into threedimensional arrangements due to their high monodispersity (see Supporting Information). For intermediate molar ratios, such as 1:5 and 1:4, quasi-regular cubic-shaped particles of 12 and 20 nm in edge length, respectively, were obtained (see Figure 1b,c). Even larger cubic particles of 26 nm in edge length could be synthesized using a molar ratio of 1:3 (Figure 1d).
Iron oxide nanoparticle - Wikipedia
sp. was grown in 1mM Ferrous sulphate and after 48hrs. The medium was centrifuged and fungal pellet was collected. The fungal pellet was used for TEM studies to identify the localisation of metal and to know the Aspergillus sp. Capacity to synthesize iron nanoparticles.
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