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Showing 1–5 of 5 results
Advanced filters: Author: Masatoshi Ohkura Clear advanced filters

  • The substitution of oxygen by hydride anions in oxide materials to form oxyhydrides has been difficult to achieve because it requires highly reducing conditions without transferring an electron from the hydride. An oxyhydride of BaTiO3 that is electronically conducting, stable in air and water at ambient conditions, and exchangeable with hydrogen gas at 400 °C, has now been prepared.

    • Yoji Kobayashi
    • Olivier J. Hernandez
    • Hiroshi Kageyama
    Research
    Nature Materials
    Volume: 11, P: 507-511

  • Oxynitrides are garnering interest because of their variety of novel properties, but their synthesis has typically involved highly reducing conditions that put significant constraints on their composition, structure and properties. Now, the lability of H− in perovskite oxyhydride BaTiO3−xHx has enabled H–/N3– exchange at a lower temperature, yielding a ferroelectric oxynitride BaTiO3−xN2x/3.

    • Takeshi Yajima
    • Fumitaka Takeiri
    • Hiroshi Kageyama
    Research
    Nature Chemistry
    Volume: 7, P: 1017-1023

  • An improved genetically encoded red calcium sensor enables the monitoring of neuronal activity in cell culture and in vivo. R-CaMP2 has fast kinetics and a high affinity to calcium and can follow action potentials up to 40 Hz.

    • Masatoshi Inoue
    • Atsuya Takeuchi
    • Haruhiko Bito
    Research
    Nature Methods
    Volume: 12, P: 64-70

  • Structure studies were performed on PVA gels in mixtures of dimethyl sulfoxide (DMSO) and water using various scattering methods to see the hierarchic structure. It was found that the crosslinking points are crystallites, the nearest-neighboring distance is 180–200 Å and the bicontinuous structure due to phase separation is in μm scale for the gel in DMSO/water (60/40). Dynamics of three kinds of PVA gels were also studied in nm scale using neutron spin echo technique.

    • Toshiji Kanaya
    • Nobuaki Takahashi
    • Keisuke Kaji
    Research
    Polymer Journal
    Volume: 44, P: 83-94