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Showing 1 to 20 of 76 for “"magnetic particles"”.
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Controlled synthesis of magnetic particles
Magnetic particles have been used for many applications demanding a broad 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. …
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Spin dynamics of fine magnetic particles
A computer model of fine magnetic particles has been developed based on the Landau-Lifshitz equation. It is a dynamic model which allows the detailed behaviour of the magnetic moments during magnetisation changes to be investigated. The model was initially used to study gyroremanent magnetisation …
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CDSE Quantum Dots and Luminescent/Magnetic Particles for Biological Applications
… The objective of my project was to apply QDs magnetic/luminescent nanoparticle as biological labels in cells. Luminescent CdSe QDs emit bright visible light with high quantum yield and sharp emission peak. The CdSe QDs were capped with a ZnS layer. This increased their emission efficiency and …
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Magnetomotive dynamics of magnetic particles for optical imaging contrast and elastography
Magnetic particles offer several distinct advantages compared to other types of contrast agents. Their controllable size, high magnetic susceptibility and the ability of non contact manipulation through external magnetic fields allow their use in a wide variety of applications in biology and …
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Thermodynamic and transport properties of non-magnetic particles in magnetic fluids
Magnetic composites, obtained on associating magnetic fluid with non-magnetic particles, offer interesting opportunities in separations, assemblies and other applications, where the microstructure of the composite can be altered reversibly by an external field without altering the composition. The …
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Fabrication and characterization of nanostructured magnetic particles for applications in data storage
Arrays of nanostructured magnetic particles ('nanomagnets') have potential applications in ultra-high-density data storage devices and dynamic magnetic memories, and are model systems for the study of magnetic phenomena at deep sub-micron length scales. We use interference lithography to pattern …
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Comprehensive Investigation of the Properties of Carbonized Magnetic Particles: From Synthesis to Applications
Esta tesis presenta un estudio sobre materiales híbridos magnético-carbonáceos, con el objetivo de establecer una correlación entre su morfología, microestructura y estructura cristalina con las propiedades magnéticas y las capacidades de adsorción de nanopartículas (NPs) de níquel (Ni) …
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Development of magnetic tunnel junction (MTJ) sensors for the detection of single magnetic particles
… of biomolecules. In these biosensors, magnetic microsized and nanosized particles have been used as markers of biomolecules. The concept of combining magnetic particles with the sensitivity of magnetoresistive transducers was developed initially by Baselt et al. from the Naval Research …
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Magnetically enhanced centrifugation for continuous biopharmaceutical processing
… As an integrative technique, high gradient magnetic separation (HGMS), together with the application of functional magnetic particles, provides many advantages over traditional techniques. However, HGMS has a number of drawbacks; and its application is limited because it is inherently a …
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Magnetophoretic focusing on submicron particles dispersed in a polymer-stabilized magnetic fluid
Magnetophoresis is the migration of particles upon the application of an inhomogeneous magnetic field. The overall goal of this work was to investigate the magnetophoretic focusing of non-magnetic particles suspended in magnetic fluids, which are colloidal suspensions of nano-sized magnetic …
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Self-assembly of ferromagnetic micro/nano-particles with perpendicular magnetic anisotropy
Magnetic particles offer an interesting platform for self-assembly, as their dipolar interactions and response to magnetic fields can be used to drive and manipulate assembly. Many magnetic particles used so far in these applications are quite simple in their properties, such as iron oxide …
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Characterizing Magnetic Particle Transport for Microfluidic Applications
Magnetic particles with active functional groups offer numerous advantages for use in μ-TAS (Micro Total Analytical Systems). The functional site allows chemical binding of the particle with the target species in the fluid sample. Selection of the functional group establishes the target molecule …
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Modeling of magnetorheological elastomers
… and reversibly change with the application of a magnetic field. MREs are composed of a non-magnetic polymer matrix embedded with magnetic particles. These materials can also demonstrate magnetostriction, with large strains compared to the magnetostriction seen in crystalline solids. Ultrasoft …
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Role of bit patterned media in future of hard disk drives
… data are stored in an array of single.domain magnetic particles, have been suggested as a means to overcome this limitation and to enable recording densities greater than ITb/in2. However, the implementation of patterned media requires fabrication of sub-50-nm features over large areas and the …
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Magneto-elastic behavior in hard- and soft-MRE's including demagnetizing effects
This thesis studies the magnetic and mechanical behavior of magnetorheological elastomers (MREs) based on four possible permutations defined along particle alignment (Aligned and Unaligned) and magnetization (Hard- or Soft-magnetic) pairs. These pairs designations yield classes A-H, U-H, A-S and …
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Development of a Chemiluminescent Assay for Autoantibodies to Thyroid Peroxidase
… of TPO labelled with [<sup>125</sup>I] and magnetic particles coupled to Protein A (<i>Staphylococcus aureus</i>) (MPA), with the latter separation medium used in an enzyme-immunometric assay which incorporated TPO labelled with horse-radish peroxidase (HRP-TPO). TPO was also labelled with …
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Preparation and applications of catalytic magnetic nanoparticles
… This research focuses on developing functional magnetic particles to carry strong [alpha]--nucleophilic groups, which are able to catalyze the decomposition reaction and can be recycled and reused.The amidoxime modified magnetic particles were prepared first. The original particles were …
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Magnetic Targeted Drug Delivery
Methods of guiding magnetic particles in a controlled fashion through the arterial system in vivo using external magnetic fields are explored. Included are discussions of applications, magnetic field properties needed to allow guiding based on particle characteristics, hemodynamic forces, the …
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Effect of composite elements on the mechanics of biopolymer networks
… the mechanics of collagen networks embedded with magnetic nanoparticles, focusing on the role of the external magnetic field and the influence of volume fraction of these magnetic particles. Our findings indicate that the combined effects of magnetic fields and external forces resemble stabilizing …
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Experimental and numerical study of flow characteristics and segregation in flow enhanced systems
… method examined is a novel method called the Magnetically Assisted Powder Flow (MAPF) method. In the MAPF, small magnetic particles and powders are placed in a test hopper. A mesh is placed at the bottom of the hopper to hold the magnetic particles while the powder is discharged through the …
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