A5050005200- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Silicone and Siloxane Chemistry
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Organic Electronics and Photovoltaics
- Synthesis and properties of polymers
- Graphene research and applications
- Fuel Cells and Related Materials
- Fiber-reinforced polymer composites
- Aerogels and thermal insulation
- Advanced Battery Materials and Technologies
- Geological and Geochemical Analysis
- Plant Diversity and Evolution
- Membrane-based Ion Separation Techniques
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Marine Biology and Ecology Research
- Advanced Polymer Synthesis and Characterization
- Marine Biology and Environmental Chemistry
- High voltage insulation and dielectric phenomena
- Advanced Sensor and Energy Harvesting Materials
Nagoya University
2017-2024
Hiroshima University
2020-2023
Waseda University
1986-2023
Semiconductor Energy Laboratory (Japan)
2012-2022
National Institutes for Quantum Science and Technology
2016-2022
Kumamoto University
2021
Graduate School USA
2020
Kyoto University
2020
Osaka Prefecture University
2008-2018
Nagasaki Rousai Hospital
2018
Abstract Covalent organic frameworks (COFs) are promising high‐performance capacitive deionization (CDI) materials. Strategies to optimize CDI performance of COFs focus largely on hybridization with conductive substrates, improve their intrinsically poor conductivity. A new structure‐function relationship between and substrates is proposed here based substrate‐induced surface curvature. Graphene (zero‐curvature) carbon nanotubes (CNT, curved) selected as COF growthsubstrates assess the...
Poly(ether ether ketone)-based graft-type polymer electrolyte membranes solved the trade-off relationship between conductivity and mechanical properties.
A channel length of a c -axis aligned crystal indium gallium zinc oxide (CAAC-IGZO) transistor having low off-state current at yA/µm level was decreased to 100 nm, and the electrical characteristics short-channel effect CAAC-IGZO were researched. As result, we found that, in with L = even gate insulator film an equivalent thickness (EOT) 11 extremely small 380 85 °C is maintained, addition dependence hardly seen. Favorable values can be obtained, such as subthreshold slope (SS) 77 mV/dec,...
The hybrid antifogging materials poly(3-aminopropyl)silsesquioxane (PAPS) and poly(3-(2-aminoethylaminopropyl)silsesquioxane) (PAEAPS) were prepared by sol–gel reactions that are autocatalyzed the amine moieties of monomers. PAPS PAEAPS show good film-forming abilities, films obtained found to be uniform pinhole-free. X-ray diffraction analysis indicated formation ladder-like structures. exhibit high water uptakes 34 42%, which 1.2 1.5 times typical polymer poly(vinyl alcohol) (PVA),...
Abstract The remarkable properties of 2D nanomaterials are well known. However, their high interfacial adhesion energy often leads to restacking issues, limiting potential in various applications. A strategic synthetic approach is presented overcome this challenge. Specifically, the study first demonstrates use layered aluminosilicate as a sacrificial template allow growth highly ordered meso‐holey polymeric layers, which can be subsequently exfoliated upon removal and thermally converted...
Organic-inorganic hybrid poly(methyl silsesquioxane) with a low curing temperature of 150 °C synthesized by sol-gel method is employed as gate dielectric for solution-based organic field-effect transistors. The device exhibits mobility enhancement, compared those SiO2 dielectrics, and hysteresis-free, high stable operation, which attributed to extremely concentration silanol groups the dielectric.
No abstract available
Many localities of the Gotlandian rocks have been found in Outer Zone Southwest Japan since Kobayashi and Iwaya's discovery Halysites-bearing limestone at Imose, Kochi Prefecture, Shikoku 1940. However, little has done their stratigraphy paleontology. Here, writer describes a tentative division strata with reference to Halysitidae. The bed G4, which is composed thick acidic volcanic clastic materials, presumed be Gotlandio-Devonian passage bed, correlated Takainari, Ono the, lower half...
It is essential to control the wettability of soluble organic semiconductors on polymer gate dielectrics realize low-cost, flexible, and large-area electronic circuits employing field-effect transistors using solution processes. We find that addition a small amount silica nanoparticles (SNPs) drastically improves semiconductor 6,13-bis(triisopropylsilylethynyl)pentacene onto hydrophobic dielectric poly(methylsilsesquioxane) in spin-coating process. The improvement by SNPs also demonstrated...
We report novel FETs with a structure in which not only the top surface but also side surfaces of island-shaped c-axis aligned crystalline indium-gallium-zinc oxide (CAAC-IGZO) serving as channel are surrounded by gate electrode, that is, CAAC-IGZO FETs. The maintained their favorable subthreshold characteristics even if length was scaled down to approximately 50 nm, i.e., normally-off, DIBL 67 mV/V, SS 92 mV/dec, and an off-state current lower than measurement limit (0.1 pA) for insulating...
Compounds derived from two major biomass components, cellulose and lignin, were artificially recombined via the radiation-induced graft polymerization of vinyl monomers, which could be potentially sourced onto fabric. This process yielded organic hybrids featuring a substrate surface aldehyde groups lignin-obtained vanillin. Then, Kabachnik–Fields three-component reaction (KF-3CR) poly(methacrylated vanillin) (PMV)-sourced aldehydes was carried out with amines phosphites. Overall, KF-3CR on...
For the development of polysilsesquioxanes (PSQs) as organic–inorganic hybrid materials for efficient thermal insulators, gaining a better understanding on structure–thermal property relationship PSQ gel films is essential. With this aim, PSQs were prepared via sol–gel method to investigate influence residual alkoxy groups and substituents insulation freestanding films. The diffusivities from polymethylsilsesquioxanes having ethoxy isobutoxy increased with increasing amount these groups....
Poly(glycidyloxypropyl)silsesquioxane (PGPS) was successfully synthesized by hydrolysis and polycondensation using the nitrogen flow method. A poly(3-(2,3-dihydroxypropoxypropyl)silsesquioxane) (PSQ-OH) film prepared via two routes. In route A, PSQ-OH of epoxy group PGPS in an aqueous hydrochloric acid (HCl)/tetrahydrofuran solution, affording a diol group; then, coated on glass substrate heated. The antifogging performance evaluated terms water uptake (WU) scratch resistance. obtained...
With the aim of developing an improved strategy for preparation ethylene-bridged polysilsesquioxanes as thermal insulator materials, this paper describes synthesis a crack- and shrinkage-free polysilsesquioxane film by hydrosilylation reaction hydrodimethyl-silylated oligomethylsilsesquioxane (MSQ-SiH) dimethylvinyl-silylated (MSQ-SiVi) in presence Karstedt's catalyst. Polysilsesquioxane precursors were prepared sol–gel triethoxymethylsilane successive capping with chlorodimethylsilane...
In the field of organic/inorganic hybrid polymers with application as thermal insulating materials, ethylene-bridged polysilsesquioxane films are promising materials enhanced properties due to presence intramolecular void spaces in their frameworks. With aim increasing content further enhance property resulting material, this paper describes hydrosilylation reaction hydrodimethyl-silylated oligomethylsilsesquioxane (MSQ-SiH) and octavinyl polyhedral oligomeric silsesquioxane (Vinyl-POSS)...
A poly[3-(2-aminoethylamino)propyl]silsesquioxane (PAEAPS) film was immersed in 0.5 mol/L hydrogen chloride (HCl) methanolic solution and a hydrochloride (PAEAPS-Cl) containing the amine salt prepared for development of high-performance antifogging materials based on polysilsesquioxane. The PAEAPS-Cl exhibited higher water uptake (WU) 29% scratch resistance 4.3 estimated by nanoindenter than PAEAPS (WU = 22% 3.2). introduction structure increased properties surface hardness. 29Si solid-state...
High-performance thermal insulation materials are in great demand energy-efficient applications. Nanopore formation is a promising strategy for enhancing the insulating properties of polysilsesquioxane (PSQ)-based insulation. Herein, PSQ films containing hydrosilyl group and tert-butoxycarbonyl (Boc) groups (GSQ-Boc film) were prepared via hydrosilylation reaction dehydrogenation. GSQ-Boc Boc at 3–16 wt % exhibited lower diffusivities (0.87 × 10–7–1.11 10–7 m2/s) than MSQ film (1.44 through...