A5057156905- Magneto-Optical Properties and Applications
- Microwave and Dielectric Measurement Techniques
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic Field Sensors Techniques
- Magnetic properties of thin films
- Indoor and Outdoor Localization Technologies
- Acoustic Wave Resonator Technologies
- Inertial Sensor and Navigation
- Metallic Glasses and Amorphous Alloys
- Magnetic Properties and Applications
- Electromagnetic Compatibility and Measurements
- Electromagnetic wave absorption materials
- Underwater Vehicles and Communication Systems
- Microfluidic and Bio-sensing Technologies
- Magnetic Properties and Synthesis of Ferrites
- Nanoparticle-Based Drug Delivery
- Atomic and Subatomic Physics Research
- Electromagnetic Compatibility and Noise Suppression
- Augmented Reality Applications
- Electrical and Thermal Properties of Materials
- Biosensors and Analytical Detection
- Surface Roughness and Optical Measurements
- Robotics and Automated Systems
- Gas Sensing Nanomaterials and Sensors
- Interactive and Immersive Displays
Tohoku University
2007-2025
Tohoku Gakuin University
2012-2023
Kokugakuin University
2013-2017
High Energy Accelerator Research Organization
2011
Industrial Technology Institute
2006
Gifu University
2005
Dumbbell-shaped hybrid nanoparticles, consisting of gold and iron oxide (Au-Fe3O4 NPs), show promise for magnetic hyperthermia cancer therapy. However, conventional synthesis methods using toxic pentacarbonyl (Fe(CO)5) raise safety concerns. We propose a safer approach triiron dodecacarbonyl (Fe3(CO)12) as precursor. synthesize these NPs by initially reducing (III) chloride trihydrate with tert-butylamine-borane complex at room temperature, yielding Au NPs. These are combined Fe3(CO)12...
We have developed a new permeance meter in the 1 MHz-1.5 GHz range using either microstrip pickup coil or shielded loop coil. Both coils and driving plates are free from LC resonance due to impedance matching. In MHz we must consider signal-to-noise ratio of eliminate voltage induced by electric field, an electromagnetic higher order mode plates.
In this study, we aim to develop gold-coated Fe3O4 nanoparticles (Fe3O4@Au NPs) as theranostic agents for magnetic hyperthermia and CT imaging applications. The NPs were synthesized via thermal decomposition method, the gold was then deposited onto surface of by reducing acetate at 190 °C. average sizes Fe3O4@Au 5.2 nm 6.1 nm, respectively, which are effectively removed kidneys. magnetization (9.7 emu/g-Fe3O4) 300 K much smaller than that (52.4 emu/g-Fe3O4). heating efficiency in water...
We have developed a magnetic motion capture system consisting of up to two markers (Nd-Fe-B magnet) and four three-axial sensors. The position orientation the (dipole) are detected by measuring field markers. Position accuracy one marker is about 3 mm when located 150 from sensor, 20 most common error source crosstalk between cores
With the aim of improving detection accuracy a wireless magnetic position-sensing system using an <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> resonant marker, pickup coil with optimal size (10 mm in diameter × thick), as calculated by previous simulation study, was used and tested this paper. Our study confirmed that positional errors were reduced to submillimeter order area within xmlns:xlink="http://www.w3.org/1999/xlink">y</i> =120...
A detection technique having an accuracy of better than 1 mm is required for body motion analysis in the field medical treatment. wireless magnetic capture system one such effective technique. We propose a candidate using LC resonant marker (LC marker). Previous studies have showed that capable repeatable position if has adequate signal-to-noise (S/N ratio). However, there are some cases which results include unignorable errors because approximations, e.g. dipole assumption marker, applied...
Magnetic hyperthermia is very promising cancer therapy in which heating temperature expected to be a key determinant for its success. Herein, we present simple, real‐time, and high‐accuracy proportional‐integral‐derivative‐based control system magnetic using widely‐used induction heater fiber optic thermometer. Our vitro result shows that the of clinically‐approved Resovist® (0.5 ml) was accurately controlled with small overshoot (e.g., 45.0 ± 0.07 °C 55.0 0.11°C low‐ high‐temperature...
In this study, we demonstrated experimental findings on the ultrafast heating capabilities of ultrasmall gold-coated iron oxide magnetic nanoparticles (MNPs) (Fe3O4 @ Au NPs) utilizing ferromagnetic resonance (FMR) effect. A lab-made setup was employed to evaluate FMR and temperature increment NPs under conditions. The resonant frequency both Fe3O4 their uncoated several GHz increased with strength applied dc field as accurately described by Kittel equation. At a given field, slightly...
Antigen–antibody reactions with conjugated magnetic nanoparticles (MNPs) are widely used for detecting viruses, bacteria, and proteins. In this study, we proposed a novel method adsorbing antibodies directly on the surface of MNPs without coating any (Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ; average size 4 nm) were synthesized by thermal decomposition using oleyl amine as...
We have developed a permeance meter in the 1 MHz-2 GHz range using shielded loop type pickup coil. The effect of grounding between drive coil and was analyzed time domain reflectometry (TDR). increased output voltage eliminated multiple reflections Using grounding, magnetic thin film can be measured accurately over wide frequency range. complex is shown l /spl mu/m thick Co/sub 85/Nb/sub 12/Zr/sub 3/ film.
Alternating magnetic fields can deliver energy deeper inside the body for hyperthermia cancer therapy by using nanoparticles (MNPs). In this study, we proposed a highly effective heat generation method MNPs application of an ultra-short pulse wave. We numerically evaluated heating power with variety parameters, such as width, field amplitude, and frequency. The hysteresis curve magnetization dynamics clearly indicate larger dissipation. Hysteresis loss input increase increasing strength duty...
We present the synthesis and characterization of ultrasmall iron oxide/gold composite nanoparticles (Fe3O4@Au NPs) with different Fe3O4 sizes, along an evaluation their heating efficiency for potential use in magnetic hyperthermia (MH) applications. The NPs approximately 5, 10, 13 nm were synthesized using thermal decomposition method, followed by gold deposition via reduction acetate at 190 °C. morphology, structure, properties as-prepared Fe3O4@Au determined characterized transmission...
A highly sensitive high frequency carrier-type magnetic field sensor based on the giant magnetoimpedance effect has been developed. It combined with a carrier suppressing circuit to reduce phase noise dramatically. Highly resolution of 8.8/spl times/10/sup -7/ Oe (8.8/spl -11/ T) was demonstrated.
A novel method for measuring the complex magnetic susceptibility of nanoparticles (MNPs) has been developed by a broadband microstrip line-type probe with frequency range up to 50 GHz. Two external orthogonal DC fields, Hhard and Heasy, were applied change MNPs (Streptavidin coated, 200 nmϕ, number about 1010) based on magnetization switching theory. The in liquid, solid state, after biotin-avidin reaction polymer beads (2 μmϕ, 108) was evaluated. clear FMR same shift trend as changed...
A novel method for the rapid detection of bacteria in liquid phase point-of-care testing was developed using magnetic nanoparticles (MNPs) conjugated with antibodies. We utilized characteristic that susceptibility decreases when magnetism MNP aggregate changes from ferromagnetism to superparamagnetism after bind MNPs through an antigen-antibody reaction (Nanomag-D, 500 nmφ, 0.2 μl/sample). The Fusobacterium nucleatum samples measured a lab-made setup. found depends on concentration optical...