Satoshi Hata
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View article: Local strain effects on bandgap energy in flexible <i>h</i> -WO3 nanowires
Local strain effects on bandgap energy in flexible <i>h</i> -WO3 nanowires Open
According to theoretical predictions, local strain in the bent regions of flexible nanowires can alter their electronic structure. However, the experimental validation of such strain-induced effects remains elusive. In this study, we estab…
View article: Heteroepitaxial Growth of <i>β</i> ‐Ga <sub>2</sub> O <sub>3</sub> on Diamond (111) via Radio Frequency Magnetron Sputtering: Mechanistic Insights from Scanning/Transmission Electron Microscopy
Heteroepitaxial Growth of <i>β</i> ‐Ga <sub>2</sub> O <sub>3</sub> on Diamond (111) via Radio Frequency Magnetron Sputtering: Mechanistic Insights from Scanning/Transmission Electron Microscopy Open
This study delves into the comprehensive microstructural analysis of heteroepitaxial β ‐Ga 2 O 3 thin films grown on single‐crystal diamond (111) wafers by radio frequency magnetron sputtering. The heterostructure is probed through a scann…
View article: Real-time in-situ three-dimensional observation of dislocations during tensile deformation
Real-time in-situ three-dimensional observation of dislocations during tensile deformation Open
View article: Pressurized Physically Activated Carbon: A High-Performance and Cost-Effective Cathode Host Material with a Tunable Pore Structure for Use in Lithium-Sulfur Batteries
Pressurized Physically Activated Carbon: A High-Performance and Cost-Effective Cathode Host Material with a Tunable Pore Structure for Use in Lithium-Sulfur Batteries Open
View article: Light Emission Enhancement on Nanostructured Surfaces Nanoscopicaly Probed by Photon Correlation Cathodoluminescence
Light Emission Enhancement on Nanostructured Surfaces Nanoscopicaly Probed by Photon Correlation Cathodoluminescence Open
View article: Effect of Layering Configuration on the Mechanical Performance of Al-Foil/Glass Fiber/Epoxy Hybrid Laminates
Effect of Layering Configuration on the Mechanical Performance of Al-Foil/Glass Fiber/Epoxy Hybrid Laminates Open
View article: Integrating machine learning with advanced processing and characterization for polycrystalline materials: a methodology review and application to iron-based superconductors
Integrating machine learning with advanced processing and characterization for polycrystalline materials: a methodology review and application to iron-based superconductors Open
In this review, we present a new set of machine learning-based materials research methodologies for polycrystalline materials developed through the Core Research for Evolutionary Science and Technology project of the Japan Science and Tech…
View article: Improvement of the nylon (N)-glass fiber (G) reinforced polyester composite properties by varying oxide ceramic particles and stacking sequences of N and G
Improvement of the nylon (N)-glass fiber (G) reinforced polyester composite properties by varying oxide ceramic particles and stacking sequences of N and G Open
This study investigated the mechanical and physical properties of hybrid composites made with nylon fiber mesh (N), woven glass fiber (G), and unsaturated polyester (UPE) resin filled with different oxide ceramic particles (CPs) (ZnO, Al 2…
View article: Superconducting (Ba,K)Fe2As2 epitaxial films on single and bicrystal SrTiO3 substrates
Superconducting (Ba,K)Fe2As2 epitaxial films on single and bicrystal SrTiO3 substrates Open
The realization of single crystal and bicrystal films of superconducting materials is of great interest because they allow the investigation of the intragrain performance as well as the understanding of potential limitations in the grain b…
View article: Administration of Young Coconut (Cocos nucifera L.) Juice Ameliorates Memory Impairment in a Menopausal Rat Model
Administration of Young Coconut (Cocos nucifera L.) Juice Ameliorates Memory Impairment in a Menopausal Rat Model Open
Background/Objectives: In Southeast Asia, the traditional use of young coconut (Cocos nucifera L.) juice (YCJ) by women to alleviate postmenopausal symptoms suggests potential estrogenic properties. However, few studies explore the impact …
View article: High tolerance of the superconducting current to large grain boundary angles in potassium-doped BaFe2As2
High tolerance of the superconducting current to large grain boundary angles in potassium-doped BaFe2As2 Open
Superconducting magnets based on high-temperature superconductors (HTSs) have become critical components in cutting-edge technologies such as advanced medical applications. In HTSs, weak links of superconductivity are inevitable at high-an…
View article: Structural analysis and transport properties of [010]-tilt grain boundaries in Fe(Se,Te)
Structural analysis and transport properties of [010]-tilt grain boundaries in Fe(Se,Te) Open
Understanding the nature of grain boundaries is a prerequisite for fabricating high-performance superconducting bulks and wires. For iron-based superconductors [e.g. Ba(Fe,Co)2As2, Fe(Se,Te), and NdFeAs(O,F)], the dep…
View article: High-fidelity phase-field simulation of solid-state sintering enabled by Bayesian data assimilation using in situ electron tomography data
High-fidelity phase-field simulation of solid-state sintering enabled by Bayesian data assimilation using in situ electron tomography data Open
Experimental observation methods for understanding industrially important solid-state sintering are essential for the development of new materials and devices. To experimentally characterize solid-state sintering, the limitations posed by …
View article: Transformation Behaviors and Microstructure Modifications in Hydrogen-Charged Ti–Ni Shape Memory Alloy
Transformation Behaviors and Microstructure Modifications in Hydrogen-Charged Ti–Ni Shape Memory Alloy Open
The effect of hydrogen charging duration on the transformation behavior, microstructural evolution, and dynamic microstructural changes associated with thermoelastic martensitic transformation in Ti–Ni shape memory alloy was investigated. …
View article: Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite
Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite Open
Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of hydrous asteroids. The mechanisms of space weathering, its effects on mineral surf…
View article: <i>In-situ</i> heating-and-electron tomography for materials research: from 3D (<i>in-situ</i> 2D) to 4D (<i>in-situ</i> 3D)
<i>In-situ</i> heating-and-electron tomography for materials research: from 3D (<i>in-situ</i> 2D) to 4D (<i>in-situ</i> 3D) Open
In-situ observation has expanded the application of transmission electron microscopy (TEM) and has made a significant contribution to materials research and development for energy, biomedical, quantum, etc. Recent technological development…
View article: Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale
Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale Open
Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that…
View article: Microstructure and Its Evolution of Solute-Enriched Stacking Faults in Kink-Deformed Mg<sub>97</sub>Zn<sub>1</sub>Y<sub>2</sub>
Microstructure and Its Evolution of Solute-Enriched Stacking Faults in Kink-Deformed Mg<sub>97</sub>Zn<sub>1</sub>Y<sub>2</sub> Open
Microstructure and its evolution of solute-enriched stacking faults (SESFs) in kink-deformed Mg–Zn–Y alloys have been investigated by scanning transmission electron microscopy (STEM). Mass-thickness contrast in annular dark-field (ADF) STE…
View article: In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain
In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain Open
The Hayabusa2 mission from the Japan Aerospace Exploration Agency (JAXA) returned to the Earth samples of carbonaceous asteroid (162173) Ryugu. This mission offers a unique opportunity to investigate in the laboratory samples from a C‐type…
View article: Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples
Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples Open
Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate‐rich matrix with four‐dimen…
View article: Real-Time In-Situ Three-Dimensional Observation of Dislocations During Tensile Deformation
Real-Time In-Situ Three-Dimensional Observation of Dislocations During Tensile Deformation Open
View article: Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples
Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples Open
View article: Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu
Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu Open
Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI chondrites and some types of space weathering. We report detailed mineralogy of the fin…
View article: Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil
Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil Open
Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They resemble CI chondrites material, thus showing clear evidence of extensive aqueous alter…
View article: Hydrogen-induced phase with martensitic-like characteristics in Ti-Ni shape memory alloys
Hydrogen-induced phase with martensitic-like characteristics in Ti-Ni shape memory alloys Open
It has been reported that functional and mechanical properties of Ti-Ni shape memory alloys could be degraded by hydrogen absorption. Many studies have indicated the formation of a hardened layer on the surface in hydrogen-absorbed Ti-Ni a…
View article: Delayed Right Ventricular Pacemaker Lead Perforation 9 Years After Implantation
Delayed Right Ventricular Pacemaker Lead Perforation 9 Years After Implantation Open
BACKGROUND Cardiac perforation is a rare complication of cardiac implantable electronic devices, with a reported incidence ranging from 0.1% to 5.2%. Delayed perforation, defined as perforation occurring more than 1 month after implantatio…
View article: Recent progress on epitaxial growth of Fe-based superconducting thin films
Recent progress on epitaxial growth of Fe-based superconducting thin films Open
Since the discovery of Fe-based superconductors, a lot of effort has been devoted to growing single crystals and epitaxial thin films of them for fundamental studies and applied research of superconductivity. As a result, epitaxial thin fi…
View article: Application and limitation of a biological clock-based method for estimating time of death in forensic practices
Application and limitation of a biological clock-based method for estimating time of death in forensic practices Open
View article: Re-distribution of volatiles on the airless surface of the C-type carbonaceous asteroid Ryugu.
Re-distribution of volatiles on the airless surface of the C-type carbonaceous asteroid Ryugu. Open
Volatile components are abundant in carbonaceous asteroids and can be important tracers for the evolution of asteroid surfaces interacting with the space environment, but their behavior on airless surfaces is poorly understood. Samples fro…
View article: Nonequilibrium spherulitic magnetite in the Ryugu samples
Nonequilibrium spherulitic magnetite in the Ryugu samples Open