A5064024097- Terahertz technology and applications
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Distributed and Parallel Computing Systems
- High-Energy Particle Collisions Research
- Microbial Inactivation Methods
- Radiation Detection and Scintillator Technologies
- Advanced Biosensing Techniques and Applications
- Metamaterials and Metasurfaces Applications
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Lipid Membrane Structure and Behavior
- Hydraulic Fracturing and Reservoir Analysis
- Advancements in Semiconductor Devices and Circuit Design
- Drilling and Well Engineering
- Transition Metal Oxide Nanomaterials
- Photodynamic Therapy Research Studies
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- bioluminescence and chemiluminescence research
- Advanced Fluorescence Microscopy Techniques
- Allergic Rhinitis and Sensitization
Kureha (Japan)
2023
Naruto University of Education
2008-2020
RIKEN Center for Advanced Photonics
2018-2019
Tohoku University
2006-2011
Osaka University
2011
Japan Radioisotope Association
2011
Institute for Molecular Science
2005
A label-free biological sensor, which is based on the resonant transmission phenomenon of a thin metallic mesh, proposed in terahertz wave region. By using this we demonstrate highly sensitive detection small amounts protein horseradish peroxidase. For quantitative investigation sensitivity our peroxidase was printed mesh surface by commercial available printer. distinct shift dip frequency observed for 500pg∕mm2 (11fmol) indicating significantly high sensor.
A surface-wave sensor based on the resonant transmission characteristics of metal hole arrays is demonstrated in terahertz (THz) region. Since frequency peak a array, which corresponds to surface waves, particularly sensitive refractive index vicinity surface, very small change substances attached can be detected by monitoring spectrum. By attaching layer substance (thickness t < 5 microm) much thinner than wavelength THz wave (lambda(THz) = 1 mm at 0.3 THz) we that existence such amount...
Recent progress has been made in the development of terahertz (THz) waves for practical applications. Few studies that have assessed biological effects THz reported, and data currently available regarding safety is inadequate. In this study, effect wave exposure on two cultured cells was using a widely tunable source with 0.3–0.6 frequency range, which can be used increased one GHz increments. The applied to were weak enough such any thermal could disregarded. influence both proliferative...
Twisted nematic type THz polarization control devices using liquid crystal immersed membrane films were fabricated by simple stacking process. First of all, we verify the alignment effect in various kinds films. From Time-Domain Spectroscopy measurements, apparent refractive index anisotropy was observed Polytetrafluoroethylene and Polyolefin Furthermore, transmission properties twisted device are rough agreement with 4 × matrix calculation data. We believe that primary characteristic TN can...
We have studied the production of projectile-like fragments Be8 and B9 produced in interactions 200 to 400 MeV/nucleon carbon ions with water, using emulsion detectors. In this Brief Report we present first published cross section fragment energy region above 100 MeV/nucleon. The measured sections these nuclides were compared calculations a semiempirical model. found that deviate from calculated values by factor up about six. This information is importance for benchmarking improving heavy...
Summary Sealing elements (SEs) of fracture plugs have crucial roles to isolate target zones a well in hydraulic fracturing. If the zonal isolation by SE is not adequate, it can result erosion casing. To best authors’ knowledge, effect casing deformation on sealing performance researched or understood. study performance, finite element analysis (FEA) SEs oval casings was conducted this study. Finite simulation degradable plug with three different ovalities (0%, 2%, and 5%) designs (O-ring...
We propose a new label-free allergen sensing technique using metallic mesh and nitrocellulose membrane, which is generally used for fixation of protein. Our method relies on change in the transmittance terahertz (THz) radiation passed through sample was placed. Label-free detection THz biomedicine that enables us to make easier faster food inspections. By this technique, we demonstrated detecting interaction between streptavidin - biotin α-casein- anti α-casein antibody each membrane. The...
We have fabricated the Pt/ZnO Schottky diode based on single crystal substrate grown by hydrothermal growth method. The output signals from were analyzed for incidence of x-rays and α-rays, clear responses those radiations observed. demonstrated a potential ZnO device ionizing radiations. In addition, we investigated radiation hardness material irradiating sample with high energy proton beam. electrical characteristics not been significantly changed even after irradiation 10 <sup...
We demonstrate an imaging method combined a terahertz time-domain spectroscopy and interference effect for label-free protein detection on membrane filter. Biotin is linked to the using poly ethylene glycol (PEG) or methyl ether (MPEG) prevent it from being washed off. Binding of biotin with streptavidin then observed by measuring signal change due variation refractive index. From result competition binding experiments, becomes clear that specific antibody are detected this method. This...
We report on a novel sensing method in the terahertz region using metallic mesh. Conventionally, band-pass filter property of mesh can be adjusted by changing geometrical parameters. However, parameters also depend refractive index medium vicinity openings. To inspect this effect as potential measurement principle, we calculated electric field distribution around and analyzed frequency characteristics due to sample attached Finite Difference Time Domain method. For bio-molecular sensing,...
We report on a sensing method in the terahertz range using metallic mesh (MM). Conventionally, filter property of an MM can be changed by geometrical parameters MM. Considering that this is also when medium vicinity openings has different permittivity, we were able to measure small amounts absorbing materials and thin plastic films mesh. observed change both transmission characteristics images.
To investigate the non-thermal effects of terahertz (THz) waves, weak 0.3- or 0.6-THz continuous-wave radiation was applied to human skin fibroblast cells using a uni-traveling-carrier photodiode. The exposure broadband THz pulses emitted from photoconductive antenna were also examined. There no changes in metabolic activity morphology exposed and sham-exposed cells.
A compact fluorescence recovery after photo-bleaching (FRAP) apparatus was constructed using a semiconductor laser as an illumination light source. The second harmonic, 560 nm, of the 1120 nm is guided to source point microscope by optical fiber. Since wavelength almost fits absorption maximum dye molecule rhodamine B sulfonyl, induced efficiently with minimum heating lens system. time dependence directly measured photo-multiplier attached and diffusion coefficient lipid molecules...
We report on a novel sensing method in the terahertz (THz) range using thin metallic mesh (TMM). Conventionally, filter property of TMM can be changed by geometrical parameters TMM. Considering that it is also change when medium vicinity openings has different refractive index, we inspected this principle. For biomaterial measurements, deposited avidin solution uniformly observed transmission characteristics.