A5019812164- Advanced machining processes and optimization
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Manufacturing Process and Optimization
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Condensed Matter Physics
- Advanced Measurement and Metrology Techniques
- Rare-earth and actinide compounds
- Atomic and Molecular Physics
- Advanced Surface Polishing Techniques
- Iron-based superconductors research
- Crystallography and molecular interactions
- Advanced Chemical Physics Studies
- High-pressure geophysics and materials
- Fullerene Chemistry and Applications
- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Perovskite Materials and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Chalcogenide Semiconductor Thin Films
- Engineering Technology and Methodologies
- Physics of Superconductivity and Magnetism
- Organometallic Compounds Synthesis and Characterization
- Magnetic and transport properties of perovskites and related materials
SPring-8
2013-2024
Japan Synchrotron Radiation Research Institute
2015-2024
Advanced Algorithm and Systems (Japan)
2024
National Center For Child Health and Development
2023
Setsunan University
2008
Kobe University
1991-2007
Kochi University of Technology
2004-2007
Kurume Institute of Technology
2003
RIKEN
1998
Tokyo Metropolitan University
1991-1997
Elucidating the state of interfacial water, especially hydrogen-bond configurations, is considered to be key for a better understanding functions polymers that are exhibited in presence water. Here, an analysis this direction conducted two water-insoluble biocompatible polymers, poly(2-methoxyethyl acrylate) and cyclic(poly(2-methoxyethyl acrylate)), non-biocompatible polymer, poly(n-butyl acrylate), by measuring their IR spectra under humidified conditions carrying out theoretical...
Abstract Lewy bodies (LBs), which mainly consist of α-synuclein (α-syn), are neuropathological hallmarks patients with Parkinson’s disease (PD). The fine structure LBs is unknown and cannot be made artificially. Nevertheless, many studies have described fibrillisation using recombinant α-syn purified from E. coli . An extremely fundamental problem whether the same as that amyloid fibrils. Thus, we used synchrotron Fourier transform infrared micro-spectroscopy (FTIRM) to analyse in brain PD...
Effect of alkyl chain spacer length between the charged groups (CSL) in zwitterionic poly(sulfobetaine) (PSB) brushes on hydration state was investigated. PSB with ethyl (PMAES), propyl (PMAPS), or butyl (PMABS) CSL were prepared by surface-initiated atom transfer radical polymerization silicon wafers. Hydration states aqueous solutions and/or humid vapor investigated contact angle measurement, infrared spectroscopy, AFM observation, and neutron reflectivity. The are swollen air deionized...
The range of unit cell orientations generated at the kink a bent single crystal poses unsurmountable challenges with diffraction analysis and limits insight into molecular-scale mechanism bending. On plastically hexachlorobenzene, it is demonstrated here that spatially resolved microfocus infrared spectroscopy using synchrotron radiation can be applied in conjunction periodic density functional theory calculations to predict spectral changes or extract information on structural occur as...
Abstract Molecular crystals are not known to be as stiff metals, composites and ceramics. Here we report an exceptional mechanical stiffness high hardness in a elastically bendable organic cocrystal [caffeine (CAF), 4-chloro-3-nitrobenzoic acid (CNB) methanol (1:1:1)] which is comparable certain low-density metals. Spatially resolved atomic level studies reveal that the mechanically interlocked weak hydrogen bond networks separated by dispersive interactions give rise these properties. Upon...
Characteristic features of acoustic emission (AE) signals are analyzed and measured during turning medium carbon steel with both coated uncoated tools. It was found that the AE signal changes from burst-type to continuous-type as tool is worn away ceramic coating removed. The further one a large amplitude variation approaches termination. A procedure proposed classify into three categories based on experimental results identify condition by employing pattern recognition technique. Further...
The electrochemical oxidation of an acetone solution containing [MnIII (5-MeOsaltmen)(H2O)]2(PF6)2 (5-MeOsaltmen2– = N,N′-(1,1,2,2-tetramethylethylene)bis(5-methoxysalicylideneiminate)) and (NBu4)[Ni(dmit)2] (dmit2– 2-thioxo-1,3-dithiole-4,5-dithiolate) afforded a hybrid material, [Mn(5-MeOsaltmen)(acetone)]2[Ni(dmit)2]6 (1), in which [Mn2]2+ single-molecule magnets (SMMs) with ST 4 ground state [Ni(dmit)2]n− molecules charge-ordered (n 0 or 1) are assembled layer-by-layer structure....
The wetting behavior of superhydrophilic polyelectrolyte brushes was investigated. Reflection interference contrast microscopy demonstrated that the contact angles water on were extremely low but remained finite in range <3°. presence molecules evident, even outside macroscopic droplet. These confined to thin brush layers and contained a highly ordered hydrogen bond network, which identified as structural water. film changed surface energies, prevented complete surface.
The NaCaA-85 zeolite sample which works as an efficient adsorbent for CO<sub>2</sub>at RT and in low pressure range was found its specificity is nicely explained by the model composed of CO<sub>2</sub>pinned two types Ca<sup>2+</sup>ions through far-IR DFT studies.
The mass distribution of neutral carbon clusters generated by a laser vaporization graphite in He was safely determined single photon (10.5 eV) ionization technique. resulting surprisingly different from those reported previous articles. It found that the under moderate fluence condition (0.1–1 J/cm2) consists mostly even-numbered monocyclic rings with cluster sizes n=10–18. formation mechanism such upon irradiation is discussed.
We investigated the infrared optical spectra of an organic dimer Mott insulator $\ensuremath{\kappa}\mathrm{\text{\ensuremath{-}}}(\mathrm{BEDT}\mathrm{\text{\ensuremath{-}}}\mathrm{TTF}{)}_{2}\mathrm{Cu}[\mathrm{N}(\mathrm{CN}{)}_{2}]\mathrm{Cl}$, which was irradiated with x rays. observed that irradiation caused a large spectral weight transfer from midinfrared region, where interband transitions in and Mott-Hubbard bands take place, to Drude part low-energy region; this gap collapse. The...
Plastic bending of organic crystals is a well-known, yet mechanistically poorly understood phenomenon. On three structurally related epimers, derivatives galactose, glucose, and mannose, it demonstrated here that small changes in the molecular structure can have profound effect on mechanical properties. While galactose derivative affords which be easily bent, glucose mannose are brittle do not bend. Structural, microscopic, evidence provided showing hydrogen bonding water molecules key...
The excitonic insulator Ta2NiSe5 experiences a first-order structural transition under pressure from rippled to flat layer-structure at Ps ∼ 3 GPa, which drives the system an almost zero-gap semiconductor semimetal. pressure-induced semimetal, with lowering temperature, another semimetal partial-gap of ∼0.1–0.2 eV, accompanied monoclinic distortion analogous that occurs below Ps. We argue originates primarily symmetry-allowed hybridization Ta-conduction and Ni-valence bands due lattice...