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Showing 1 to 14 of 14 for “"Superparamagnetism"”.
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Synthesis and properties of transition-metal arsenide nanostructures: from superparamagnetism to superconductivity
… transition elements and Pn = P, As etc.]. The superparamagnetism of transition-metal pnictides (e.g. FeAs, CoAs) nanomaterials obtained by this method have interesting magnetic features like high blocking temperatures and inter-particle magnetic exchange. Paper III, shows the concept of …
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Fabrication and application of patterned magnetic media
In order to overcome the superparamagnetism in thin film magnetic recording media, a novel magnetic medium, called patterned medium, is studied here as a potential candidate for the future hard disk storage application. Within the patterned medium, one bit is stored in one magnetic unit, which has …
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High Anisotropy CoPt (L1(0) & L1(1) Phase) Magnetic Recording Media Films
… (Ku) is required to delay the onset of superparamagnetism. L1(0) and L1(1) phase CoPt thin films have been considered as potential candidates due to their large Ku values and corrosion resistance, which allow smaller thermally stable grains. In this research work, L1(0) and L1(1) CoPt …
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Preparation and Characterization of Magnetic Nanocomposite in a Polymer Matrix By Ion Implantation
… was observed. Both ferromagnetism and superparamagnetism have been observed in Fe/PEEK nanocomposites.
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Iron Oxide Nanoparticle Surface Modification: Synthesis and Characterization
… theranostic applications due to their documented superparamagnetism, high biocompatibility, and other unique physicochemical properties. The aim of this thesis is to establish a viable set of methods for preparing magnetite (iron oxide) nanoparticles through hydrothermal synthesis and modifying …
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Studying DNA-Directed Nanoassembly, Hybridization and Mismatch-Discrimination via Plasmon Scattering of Gold Nanoparticles
… selectivity, magnetic microparticles (MMP) with superparamagnetism were employed in the LSPR-assisted target DNA detection. The ultrabright non-bleaching plasmonic scattering from nAu allowed direct quantification without the need for additional signal amplification.
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Thermally Responsive Peptide Coated Superparamagnetic Iron Oxide Nanoparticles for Drug Delivery
… compromising the inner cores properties such as superparamagnetism is highly desirable. Two shapes of iron oxide (spherical and tubular) were prepared using co-precipitation of iron (II) and (III) ion and oxidative hydrolysis of ferrous sulphate in alkaline solutions, respectively. Spherical …
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Understanding The Physics Of Magnetic Nanoparticles And Their Applications In The Biomedical Field
… freezing. In addition to features attributed to superparamagnetism, these nanoparticles can also exhibit magnetic relaxation effects at very low temperatures (≲ 50 K). Our studies suggest that all structural defects, and not just surface spins, are responsible for the low-temperature glass-like …
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Factors influencing the uptake and fate of metallic nanoparticles in filter-feeding bivalves
… properties, including novel optical behavior and superparamagnetism, are continually being developed for biomedical and industrial applications. In certain biomedical applications where extended blood half-lives are required, MetNPs are surface-functionalized using polymers, proteins, and other …
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Gas-phase synthesis of gold- and silica-coated nanoparticles.
… behavior such as plasmon resonance combined with superparamagnetism. Gas-phase nanoparticle synthesis processes are promising because they can continuously produce particles with high mass-yield rates. In this dissertation, new methods are investigated for producing gas-phase coatings of …
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Preparation and investigation of new heterostructures for prospective energetic and biomedical applications
… reflect in unique physical properties such as superparamagnetism, enhanced coercivity, quantum tunnelling of the magnetization and giant magnetoresistance with respect to multi domain bulk magnets. The controlled manufacture of matter at the nanoscale is considered therefore as a promising …
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Controlled synthesis of magnetic particles
… range of particles morphologies and chemistries. Superparamagnetism is advantageous over ferromagnetism because it enables us to control and recover magnetic nanoparticles during and after chemical processing. Superparamagnetic particles have an oriented magnetic moment under a magnetic field but …
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Self-assembly of magnetic nanoparticles: A tool for building at the nanoscale
Nanoparticles can be used as building blocks of materials. Properties of such materials depend on the organization of the constituent particles. Thus, control over particle organization enables control over material properties. However, robust and scalable methods for arranging nanoparticles are …
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Self-assembly of anisotropic nanostructures and interferometric spectroscopy
With the development of controlled and predictable nanoparticle fabrication, assembling multiple nano-objects into larger functional nanostructure has attracted increasing attention. As the most basic structure, assembly of one-dimensional (1D) structures is a good model for investigating the …