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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"magnetite nanoparticles"”.
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Formation and alteration of magnetite nanoparticles
Magnetite is an iron oxide, which is ubiquitous in rocks and is usually deposited as small nanoparticulate matter among other rock material. It differs from most other iron oxides because it contains divalent and trivalent iron. Consequently, it has a special crystal structure and unique magnetic …
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Gold and Magnetite Nanoparticles as Sensors of Conformational Changes in Proteins
… using helical polypeptides attached to gold or magnetite nanoparticle surfaces. Depending on type and loading of the polypeptide on the surface of gold nanoparticles, pH, temperature, presence of different ions in the solution, and influence of different mechanical factors, conformational …
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Transgene-free strategies for wireless control of animal physiology using magnetite nanoparticles
… arbitrarily deep. When combined with magnetic nanoparticles of biocompatible iron oxide, which can dissipate heat or produce forces when subjected to applied magnetic fields, magnetic fields can be applied from outside the body and evoke a physiological response within. This thesis describes …
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Implications of Oxidation on the Colloidal Stability of Magnetite Nanoparticles and Cluster
Synthetic nanomagnetite has been suggested as a potential reactant for the in-situ treatment of contaminated groundwater. Although the application of nanomagnetite for environmental remediation is promising, a full understanding of its reactivity has been deterred by the propensity of the …
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Polymer Stabilized Magnetite Nanoparticles and Poly(propylene oxide) Modified Styrene-Dimethacrylate Networks
Magnetic nanoparticles that display high saturation magnetization and high magnetic susceptibility are of great interest for medical applications. Nanomagnetite is particularly desirable because it displays strong ferrimagnetic behavior, and is less sensitive to oxidation than magnetic transition …
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Surface Functionalized Water-Dispersible Magnetite Nanoparticles: Preparation, Characterization and the Studies of Their Bioapplications
… variety of biomedical applications. Non-uniform nanoparticles with poor crystallinity, prepared by conventional methods, have only limited value in biological areas. Large scale synthesis methods that are able to produce high quality, mono-dispersed iron oxide nanoparticles using low cost and …
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Solution and Adsorption Characterization of Novel Water-Soluble Ionic Block Copolymers for Stabilization of Magnetite Nanoparticles
… to predict the size and colloidal stability of magnetite-polymer complexes using the modified Deryaguin-Verwey-Landau-Overbeek theory. Novel hydrophilic triblock copolymers comprised of poly(ethylene oxide) tailblocks and a carboxylic acid containing polyurethane center block were examined by …
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Encapsulation of nanomagnetite within polycaprolactone microspheres for bone replacement
… of a new bone graft replacement combining magnetite nanoparticles with polycaprolactone (PCL) to produce a material that can soften in response to the application of an alternating magnetic field. The magnetite nanoparticles were synthesized by a non-surfactant method and then emulsified …
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Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers
Two novel synthetic routes to formation of gold-magnetite nanoparticles have been designed. Treatment of preformed magnetite nanoparticles with ultrasound in aqueous media with dissolved tetrachloroauric acid resulted in the formation of gold-magnetite nanocomposite materials. The other route …
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Synthesis and Characterization of Novel Magnetite Nanoparticle Block Copolymer Complexes
Superparamagnetic Magnetite (Fe3O4) nanoparticles were synthesized and complexed with carboxylate-functionalized block copolymers, and aqueous dispersions of the complexes were investigated as functions of their chemical and morphological structures. The block copolymer dispersants possessed either …
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Magneto-Optic Spectroscopy and Near-Field Optical Coupling in Nanoparticle Composite Materials
… rotation spectrum of composites containing magnetite nanoparticles is found to be dependent on the interparticle spacing of the constituent nanoparticles. The composite materials are prepared by combining chemicallysynthesized Fe3O4 (magnetite) nanoparticles (8 nm diameter) and …
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In Situe Synthesis of Iron Oxide within Polyvinylamine nanoparticles
Magnetic nanoparticles that display high saturation magnetization and high magnetic susceptibility with a size less than 200 nm are of great interest for medical applications. Investigations of magnetic nanoparticles have been increasing over the last decade. Magnetite nanoparticles are …
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Nanomaterials for Biological Applications: Drug Delivery and Bio-sensing
… practiced during the recent decades. Magnetic nanoparticles (MPs), especially superparamagnetic iron oxide nanoparticles have been demonstrated as promising candidates for biomedicine. A protective coating process with biocompatible materials is commonly performed on MPs to further enhance …
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Novel Synthetic Routes to Formation of Magnetic Nanocomposites
Novel synthetic routes to formation of gold-magnetite nanoparticles have been designed by sonochemistry. Treatment of preformed magnetite nanoparticles with ultrasound in aqueous media with dissolved tetrachloroauric acid resulted in the formation of gold-magnetite nanocomposite materials. These …
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Synthesis and Characterization of Polylactide-siloxane Block Copolymers as Magnetite Nanoparticle Dispersion Stabilizers
… have been designed and synthesized for study as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest in a variety of biomedical applications, including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable …
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Synthesis and Characterization of Novel Polyethers and Polydimethylsiloxanes for Use in Biomaterials
… polydimethylsiloxanes in the stabilization of magnetite nanoparticles as well as biomedical applications. The colloidal stabilities of magnetite nanoparticles coated with polyethers containing various functional endgroups were studied. Different variables (e.g. polymer loading, polyether …
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Magnetic seeding aggregation to enhance the removal efficiency of TiO2 nanoparticles from water
Engineered nanoparticles, such as titanium dioxide (TiO_2), are important building blocks for the evolution of nanotechnology in industries and commercial products. Ever so increasing use of the engineered nanoparticles is bound to result in a substantial fraction of these nanoparticles ending up …
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Synthesis and Characterization of Well-Defined Heterobifunctional Polyethers for Coating Magnetite and Their Applications in Biomedicine Resonance Imaging
… end-functional polyethers were adsorbed onto magnetite nanoparticles and the stabilities of the polymer-magnetite complexes were compared as a function of the type of anchoring moiety and the number of anchoring moieties per chain. Anchoring chemistries investigated in this work included …
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Forming magnetic chain with the help of biological organisms
Magnetite nanoparticles and their assembly comprise a new area of development for new technologies. The magnetic particles can interact and assemble in chains or networks. Magnetotactic bacteria are one of the most interesting microorganisms, in which the assembly of nanoparticles occurs. These …
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Synthesis and Characterization of Surface-Functionalized Magnetic Polylactide Nanospheres
… been designed and synthesized to be studied as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest for a variety of biomedical applications including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable …
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