A5002289854- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radiation Therapy and Dosimetry
- Metal-Organic Frameworks: Synthesis and Applications
- Nuclear Physics and Applications
- Advanced Battery Technologies Research
- Radiation Detection and Scintillator Technologies
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced NMR Techniques and Applications
- Fuel Cells and Related Materials
- Reconstructive Surgery and Microvascular Techniques
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radioactive contamination and transfer
- Organic and Molecular Conductors Research
- Radio Astronomy Observations and Technology
- Phase Equilibria and Thermodynamics
- Surface and Thin Film Phenomena
Kanazawa University
2022-2025
Kyoto University
2003-2022
Kyushu University
2016-2021
Graduate School USA
2020
Waseda University
2017-2020
Okayama University
2020
Advanced Institute of Materials Science
2019
Tohoku University
2019
Nagoya University
2016
The University of Tokyo
2006-2009
The effects of LiPF6 concentration in ethylene carbonate (EC)–dimethyl (DMC) on PF6− intercalation into graphitic carbon were studied for a high-energy-density dual-carbon battery. capacity as well potential decreased with increasing when EC–DMC was used an electrolyte. Low-viscosity found to be suitable high-concentration electrolyte, and DMC is thus promising electrolyte LiPF6. the 3.7 M LiPF6/DMC (100 mAh g−1) almost same those 1 LiPF6/EC–DMC (89 g−1). Considering anode capacity, 3.1 full...
The diffusivity of PF6– intercalated into graphitic carbon is investigated using the galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS). chemical diffusion constant D estimated by GITT EIS to be around 10–12 cm2/s. in comparable or slightly higher than that Li+ oxide cathode materials such as LiFePO4 LiCoO2 for Li ion batteries. activation energy also found 0.366 eV. route probed density functional theory (DFT), easier along ⟨100⟩ direction...
We have detected sub-TeV gamma-ray emission from the direction of Galactic center (GC) using CANGAROO-II Imaging Atmospheric Cerenkov Telescope. a statistically significant excess at energies greater than 250 GeV. The flux was 1 order magnitude lower that Crab Nebula TeV with soft spectrum proportional to E-4.6±0.5. signal centroid is consistent GC direction, and observed profile pointlike source. Our data suggest GeV source 3EG J1746-2851 identical this source, we study combined spectra...
Considerable amounts of radioactive substances (mainly 137Cs and 134Cs) were released into the environment after Japanese nuclear disaster in 2011. Some restrictions on residence areas lifted April 2017, owing to successive effective decontamination operations. However, distribution vast mountain, forest satoyama close city is still unknown; thus, operations such are being hampered. In this paper, we report first aerial gamma-ray imaging a schoolyard Fukushima using drone that carries high...
Designable porous materials have potential in a plethora of applications, but synthesis costs and strict reaction conditions limit their true commercialization. Herein, we show that hypercrosslinked polymers (HCPs) can be synthesized within minutes green, low-cost, mechanochemical route which avoids the use traditional toxic solvents. Microporous HCPs were obtained as little 10 s, with optimum surface areas up to 782 m2 g–1 only 5 min quantitative yields for both Friedel–Crafts "knitting"...
Abstract Imaging of nuclear gamma-ray lines in the 1–10 MeV range is far from being established both medical and physical applications. In proton therapy, 4.4 gamma rays are emitted excited nucleus either 12 C* or 11 B* considered good indicators dose delivery and/or verification. Further, astronomy, produced by cosmic ray interactions interstellar medium, can thus be used to probe nucleothynthesis universe. this paper, we present a high-precision image taken newly developed 3-D position...
Previous studies have revealed the importance of inter-tissue communications for lifespan regulation. However, network responsible regulation is not well understood, even in a simple organism Caenorhabditis elegans. To understand mechanisms underlying systemic regulation, we focused on by insulin/insulin-like growth factor-1 signaling (IIS) pathway; IIS reduction activates DAF-16/FOXO transcription factor, which results extension. Our tissue-specific knockdown and knockout analyses...
We demonstrate one-pot conversion of CO 2 into amorphous formate-based metal-organic frameworks (MOFs) that form grain-boundary-free monoliths with permanent porosity through hot-pressing. The local coordination geometries metal ions are characterized...
We have detected gamma-ray emission at the 6sigma level energies greater than 500GeV from supernova remnant RX J0852.0-4622 (G266.2-1.2) using CANGAROO-II Imaging Atmospheric Cherenkov Telescope (IACT). The flux was 0.12 times of that Crab 1TeV. signal centroid is consistent with peak X-ray in north-west rim remnant.
Ligand molecules capping on clusters largely affect the formation and stabilization mechanism property of clusters. In semiconductor CdSe clusters, cysteine is used as one ligands allows ultrastable (CdSe)34 magic-sized Cysteine has sulfhydryl, amine, carboxylate groups, all which have coordination ability to surface, bonding states three functional groups ligand-cysteine core not been determined. this work, structure examined by performing Fourier transform infrared (FT-IR) spectroscopy,...
Controllable fabrication of ultrasmall, highly dispersed and functionalized metal nanoparticles (MNPs) is crucial for industrially important applications. Here, we demonstrate a metal-Schiff base template approach that allows confined growth broad spectrum MNPs within the reticular Schiff nanospaces with ultrasmall size (<2 nm), high dispersibility, excellent stability. Owing to unusual synergy between binding sites MNPs, strong confinement open cavities, as well distinct small "clean"...
Ligand–surface interaction of semiconductor nanoparticles (NPs) controls their optoelectronic properties, and thus examination the is essential for nanoelectronic applications NPs. Herein, solid-state nuclear magnetic resonance (NMR) performed to unravel ligand–surface in cysteine-capped CdSe magic-sized clusters. 15N–113Cd through-bond J-filtered NMR directly shows presence nitrogen–cadmium chemical bond first time indicates that ∼43% amines form bond. through-space dipolar-correlated...
Network structures of glasses are essential to understanding their bulk mechanical and functional properties. Despite growing interests in coordination polymer (CP) metal–organic framework (MOF) glasses, the macromolecular tuning networks (CN) CP/MOF remains unexplored. Here, we propose use CN size CP investigate network-dependent viscoelastic properties proton (H+) conductivities. Structural analysis having different ratios Zn/HnPO4 (1:3, 0.875:3, 0.75:3) exhibits ratio-dependent sizes....
The melt state of coordination polymer crystals is composed macromolecular-chain assemblies without bond breaking. coordination-polymer-forming liquid provides various morphologies, including spun fibers.
With the aim of controlling orientation liquid crystals (LCs) toward realizing external stimuli-responsive materials with tunable functionalities, we synthesized a composite LCs and metal-organic frameworks (MOFs) by filling into pores MOFs (LC@MOFs) for first time. The included interact through coordination bonds between cyano groups metal ions MOFs, enabling LC molecules inside realization birefringence LC@MOFs. three-dimensional nanometer interstice maintained even at temperatures much...
The application of high-resolution NMR analysis for CO2 adsorbed in a MOF under high pressure is reported the first time. results showed that MOF-74 had an unusually slow mobility (τ ∼ 10-8 s). CO2-CO2 interactions suppressed pressure, which, turn, would have contributed to stability at adsorption sites.
We propose using cocrystals as effective polarization matrices for triplet dynamic nuclear (DNP) at room temperature. The polari-zation source can be uniformly doped into formed through acid–acid, amide–amide, and acid–amide synthons. dense-packing crystal structures, facilitated by multiple hydrogen bonding – interactions, result in extended T1 relaxation times, enabling efficient diffusion within the crystals. Our study demonstrates successful of a DNP-magnetic resonance imaging molecular...
Abstract The molecular motion of imidazole (Im) in proton-conducting polyacrylic acid (PAA)/Im composite materials (PAA/ x Im, where represents the number moles Im per mole carboxyl group PAA) was investigated using solid-state 2 H NMR. For NMR analysis polymers which multiple constituents with different kinetic states coexist, we propose simultaneous two spectra observed by quadruple echo method intervals. were analyzed superimposing simulated jumping rates 180° flip and isotropic rotation...
We propose using cocrystals as effective polarization matrices for triplet dynamic nuclear (DNP) at room temperature. The source can be uniformly doped into formed through acid-acid, amide-amide, and acid-amide synthons. dense-packing crystal structures, facilitated by multiple hydrogen bonding π-π interactions, result in extended