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Showing 1 to 20 of 146 for “"superparamagnetic"”.
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Superparamagnetic contrast agents for magnetic resonance imaging
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1994.
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Engineering Superparamagnetic Iron Oxide Nanoparticles for Environmental Applications
<p>Engineered, superparamagnetic iron oxide nanoparticles (IONPs) have drawn considerable research attention for a broad range of applications based on tunable size and shape, surface chemistries, and magnetic properties. For successful aqueous-based, environmental applications, it is necessary to …
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Magnetic resonance thermometry with superparamagnetic iron oxide nanoparticles
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Polymer coated superparamagnetic beads walking on polymer coated surface
… work examines walkers that are created using superparamagnetic beads placed in a rotating external magnetic field. Dipoles align in the beads so they assemble into rotors. These rotors follow the rotating magnetic field and are able to translate across a surface. This work looks at the effect …
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Modelling the movement of superparamagnetic beads engulfed in endothelial cells
… poly-caprolactone scaffold is facilitated with superparamagnetic beads introduced to the cells by phagocytosis. It is shown that the dominant motion of the affected cells is determined by the viscous drag of the medium and the amount of coupling with an externally imposed magnetic field. An …
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Directed transport of superparamagnetic microbeads using periodic magnetically textured substrates
Superparamagnetic microbeads (SPBs) have been widely used to capture and manipulate biological entities in a fluid environment. Chip-based magnetic actuation provides a means to transport SPBs in lab-on-a-chip technologies. This is usually accomplished using the stray magnetic field from patterned …
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A Compressed Sensing Approach to Detect Immobilized Nanoparticles Using Superparamagnetic Relaxometry
<p>Superparamagnetic relaxometry (SPMR) is an emerging technology that leverages the unique properties of biologically targeted superparamagnetic iron oxide nanoparticles to detect cancer. The use of ultra-sensitive sensors enables SPMR to detect tumors ten times smaller than current imaging …
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Thermally Responsive Peptide Coated Superparamagnetic Iron Oxide Nanoparticles for Drug Delivery
… sites and trigger drug release. In this context, superparamagnetic iron oxide nanoparticles based drug delivery systems are highly desirable. Superparamagnetic iron oxide nanoparticles upon exposure of alternate magnetic field could be directed and provide heat to localised areas. Moreover, …
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Superparamagnetic Tunnel Junctions for Reliable True Randomness and Efficient Probabilistic Machine Learning
… tasks, and enhance hardware security. Recently, superparamagnetic tunnel junctions (sMTJs) have been widely explored for such purposes, leading to the development of limited-scale sMTJ-based systems. Existing sMTJs face significant scalability and reliability issues, however, because their …
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Magnetic domain walls for on-chip transport and detection of superparamagnetic beads
Surface-functionalized superparamagnetic (SPM) microbeads are of great interest in biomedical research and diagnostic device engineering for tagging, manipulating, and detecting chemical and biological species in a fluid environment. At the same time, lab-onchip technologies have grown popular due …
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Development of Novel Synthetic Methods for Size-Tunable Synthesis of Superparamagnetic Iron Oxide Nanoparticles
The properties of magnetic nanoparticles vary dramatically with size, so reproducibly controlling size is critical for practical applications. This is particularly true when moving into clinical settings, where regulatory approval requires demonstrated reproducibility in efficacy that can only be …
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Determining optimum imaging parameters for SWIFT: application to superparamagnetic iron oxides and magnetized objects.
… tested experimentally and applied to imaging of superparamagnetic iron oxides. Susceptibility artifacts distort images around metal objects. In SWIFT images the susceptibility artifacts manifest as signal voids surrounded by pileup artifacts. This work develops predictive equations for the pileup …
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Computational study of self-assembly in block copolymer/superparamagnetic nanoparticle composites under external magnetic fields
… study investigates the self-assembly of superparamagnetic nanoparticles and block copolymers under external magnetic fields. A variety of morphological transitions are observed based on the field orientation, nanoparticle loading, and selectivity of the nanoparticles for the blocks. For …
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Sol-gel matrix-mediated synthesis of superparamagnetic iron oxide clusters and supported iron porphyrin oxidation catalysts
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1998.
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Application of superparamagnetic nanoparticle-based heating for non-abrasive removal of wax deposits from subsea oil pipelines
… limitations. In our work, an application to use superparamagnetic nanoparticle-based heating for flow assurance, in the form of a magnetic nanopaint is presented. Superparamagnetic nanoparticle-based heating has been extensively researched in the biomedical industry for cancer treatment by …
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Purification of human dna for dna profiling from body fluid contaminated soil using superparamagnetic iron oxide nanoparticles (spions).
… extraction method, and a method employing superparamagnetic iron oxide nanoparticles (SPIONs) generated in-house. Extraction success and level of purity of the human DNA extracted using these methods were assessed by quantifying the amount of DNA recovered using a Nanodrop 2000 and the …
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Fundamental studies and applications for the development of novel MRI contrast agents: Hyperpolarized xenon-129 and superparamagnetic iron oxide nanoparticles
… contrast agents: hyperpolarized 129Xe gas and superparamagnetic iron oxide nanoparticles (SPIONs). The largest `Achilles' Heel' of MR techniques is their inherent lack of detection sensitivity due to the exceedingly small magnitude of the nuclear spins, giving rise to small thermal …
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Magnetostatic Modeling for Microfluidic Device Design
… <p>For several years, biologists have used superparamagnetic beads to facilitate biological separations. More recently, researchers have adopted this approach in microfluidic devices [1-3]. This recent development and use of superparamagnetic particles in biomedical and biological …
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Controlled synthesis of magnetic particles
… during and after chemical processing. Superparamagnetic particles have an oriented magnetic moment under a magnetic field but lose this behavior in the absence of a field. Ferromagnetic materials can be superparamagnetic when they consist of a single size domain, which is on the order …
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