A5090372371- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Electronic and Structural Properties of Oxides
- Gas Sensing Nanomaterials and Sensors
- Advanced Memory and Neural Computing
- Perovskite Materials and Applications
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Analytical Chemistry and Sensors
- Ga2O3 and related materials
- Electrochemical Analysis and Applications
Kyoto Bunkyo University
2022-2025
Instituto de Investigaciones Químicas
2025
Kyoto University
2022-2025
Kyoto University Institute for Chemical Research
2022-2025
Electrochemically inserting and extracting hydrogen into from solids are promising ways to explore materials' phases properties. However, it is still challenging identify the structural factors that promote insertion extraction develop materials whose functional properties can be largely modulated by through solid-state reactions at room temperature. In this study, guided theoretical calculations on energies of oxygen reduction with oxygen-deficient perovskite oxides, we demonstrated vacancy...
Abstract In this study, we grew (010)-oriented epitaxial films of brownmillerite-structured SrCoO2.5 on various substrates whose lattice mismatch against SCO ranged from 0 to -2.9% by pulsed laser deposition and investigated the effect substrate-induced strain their protonation in field transistor structures with gate layers consisting Nafion membranes. We found that H concentration were fully compressive-strained up 1.3 % was ~1.7 it almost independent magnitude strain. also content...
Abstract We epitaxially grew rutile-structured VO2 films with various out-of-plane lattice constants on (001) TiO2 substrates by pulsed laser deposition and investigated their protonation electrochemically injecting protons to the in transistor structures gate layers of proton conducting Nafion membranes. found that expansion are less protonated. On basis experimental results, we discuss correlation between epitaxial highlight reducing defects is key promoting films. 

To electrochemically control structural and transport properties of oxygen-deficient perovskite SrFeOy (2.5 ≦ y 3) (SFO) epitaxial films, we employed electric-field-effect transistor structures in which the proton-conducting solid electrolyte Nafion is used as a gate insulator. When positive voltage (VGS) applied protons are injected toward film channel layer, SFO films reduced, leading to increases resistance. On other hand, when negative VGS removed, oxidized, result, resistances decrease....
Abstract Electrochemical reactions with insertions of ions in solids depend on crystallographic orientations. We investigated electrochemical responses (100), (110) and (111)-oriented oxygen-deficient perovskite SrFeO 2.5+ y epitaxial films electric-field-effect transistor structures the proton-conducting electrolyte Nafion as a gate insulator. found that only (100)-oriented exhibit changes associated gate-voltage-induced reductions. Furthermore, elastic recoil detection analysis shows...
Abstract Electrochemical protonation provides ways to control physical properties and even explore unprecedented phases of solid‐state materials. While how proton accumulation changes materials’ is investigated, solids can be controlled promoted remains an enigmatic puzzle. In the work reported here, influence electrochemical injection duration (t Vg ) investigated on SrCoO 2.5 (SCO) films in electric‐field‐effect transistor structures with gate layers proton‐conducting electrolyte Nafion....