Kimitaka Higuchi
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View article: Effective reduction in thermal conductivity by high-density dislocations in SrTiO3
Effective reduction in thermal conductivity by high-density dislocations in SrTiO3 Open
Decreasing thermal conductivity is important for designing efficient thermoelectric devices. Traditional engineering strategies have focused on point defects and interface design. Recently, dislocations as line defects have emerged as an a…
View article: Effect of light irradiation on indentation‐induced dislocation behavior in GaN oriented for basal slip
Effect of light irradiation on indentation‐induced dislocation behavior in GaN oriented for basal slip Open
The impact of external light on dislocation‐based plasticity in inorganic compound semiconductors has been increasingly recognized. Here, we investigated the effect of light on the dislocation behavior in wurtzite GaN oriented for basal sl…
View article: Spectrophotometric analyses on electronic structures of glide dislocation cores in ZnS
Spectrophotometric analyses on electronic structures of glide dislocation cores in ZnS Open
It has been reported that dislocations in ZnS can trap photoexcited carriers and then undergo core reconstruction. However, electronic states of the trapped carriers at the reconstructed dislocations were not detected experimentally. In th…
View article: Heptamethine Cyanine Dye-Doped Single-Walled Carbon Nanotube Electrodes for Improving Performance of HTL-Free Perovskite Solar Cells
Heptamethine Cyanine Dye-Doped Single-Walled Carbon Nanotube Electrodes for Improving Performance of HTL-Free Perovskite Solar Cells Open
Perovskite solar cell (PSC) technology holds great promise with continuously improving power conversion efficiency; however, the use of metal electrodes hinders its commercialization and the development of tandem designs. Although single-w…
View article: Low-temperature redox activity and alcohol ammoxidation performance on Cu- and Ru-incorporated ceria catalysts
Low-temperature redox activity and alcohol ammoxidation performance on Cu- and Ru-incorporated ceria catalysts Open
Cu and Ru-incorporated ceria catalysts showed low-temperature redox performances in which all three metal species were involved and showed high ammoxidation activity of benzyl alcohol.
View article: Microstructure and conductivity of blacklight‐sintered TiO <sub>2</sub> , YSZ, and Li <sub>0.33</sub> La <sub>0.57</sub> TiO <sub>3</sub>
Microstructure and conductivity of blacklight‐sintered TiO <sub>2</sub> , YSZ, and Li <sub>0.33</sub> La <sub>0.57</sub> TiO <sub>3</sub> Open
Rapid densification of ceramics has been realized and its merits were demonstrated through multiple approaches out of which UHS and flash sintering attract recent attention. So far, however, scalability remains difficult. A rise in through…
View article: Topologically immobilized catalysis centre for long-term stable carbon dioxide reforming of methane
Topologically immobilized catalysis centre for long-term stable carbon dioxide reforming of methane Open
A rooted catalyst, Ni#Y2O3, successfully inhibits the growth of carbon nanotubes in DRM.
View article: Nanoporous Nickel Composite Catalyst for the Dry Reforming of Methane
Nanoporous Nickel Composite Catalyst for the Dry Reforming of Methane Open
The development of efficient catalysts with high activities and durabilities for use in the dry reforming of methane (DRM) is desirable but challenging. We report the development of a nanoporous nickel composite (nanoporous Ni/Y2
View article: Ion Environmental Appeared Inside Gas Environmental TEM; That Application and Foresight
Ion Environmental Appeared Inside Gas Environmental TEM; That Application and Foresight Open
View article: PM-053D observation of degenerate pearlite structure by FIB-SEM
PM-053D observation of degenerate pearlite structure by FIB-SEM Open
Silicon oxycarbide (SiOC) glasses are anticipated to be utilized as a component material for nuclear reactors, because of their high thermal stability, durability, and corrosion resistance.A recent research demonstrated that the formation …
View article: In-Situ TEM Study of a Nanoporous Ni–Co Catalyst Used for the Dry Reforming of Methane
In-Situ TEM Study of a Nanoporous Ni–Co Catalyst Used for the Dry Reforming of Methane Open
We performed in-situ transmission electron microscopy (TEM) on a dealloyed nanoporous NiCo catalyst used for the dry reforming of methane (DRM) to investigate the origin of the catalytic activity and structural durability. The in-situ obse…
View article: Strength against Interfacial Crack Initiation from Free-edges in Micro-components
Strength against Interfacial Crack Initiation from Free-edges in Micro-components Open
In this study, the effect of hydrogen environment on the strength against crack initiation from the interfacial free-edge of laminated micro-components (silicon nitride; SiN, copper; Cu) is investigated in detail. Two types of specimens, I…
View article: Development of an in‐situ specimen holder for high‐voltage environmental electron microscopy of fuel cells
Development of an in‐situ specimen holder for high‐voltage environmental electron microscopy of fuel cells Open
Performance of Solid oxide fuel cells (SOFCs) is affected by microstructural changes and electrochemical reactions in interfacial regions between electrode and electrolyte during the operation. SOFCs are operated at high temperatures using…
View article: Evaluation of interfacial fracture strength in micro-components with different free-edge shape
Evaluation of interfacial fracture strength in micro-components with different free-edge shape Open
The strength against interfacial fracture nucleation from the free-edge of micro-scale bimaterial cantilevers consisting of silicon (Si) and copper (Cu) components is evaluated by using specimens with different free-edge shape. The fractur…
View article: Interfacial fracture strength property of micro-scale SiN/Cu components
Interfacial fracture strength property of micro-scale SiN/Cu components Open
The strength against fracture nucleation from an interface free-edge of silicon-nitride (SiN)/copper (Cu) micro-components is evaluated. A special technique that combines a nano-indenter specimen holder and an environmental transmission el…
View article: Direct observation of catalytic oxidation of particulate matter using in situ TEM
Direct observation of catalytic oxidation of particulate matter using in situ TEM Open
The ability to observe chemical reactions at the molecular level convincingly demonstrates the physical and chemical phenomena occurring throughout a reaction mechanism. Videos obtained through in situ transmission electron microscopy (TEM…
View article: OS12-10 Evaluation of Interfacial Fracture Strength in Micro-Components with Different Free-Edge Shape(Mechanical properties of nano- and micro-materials-3,OS12 Mechanical properties of nano- and micro-materials,MICRO AND NANO MECHANICS)
OS12-10 Evaluation of Interfacial Fracture Strength in Micro-Components with Different Free-Edge Shape(Mechanical properties of nano- and micro-materials-3,OS12 Mechanical properties of nano- and micro-materials,MICRO AND NANO MECHANICS) Open