A5033053086- Photonic and Optical Devices
- Fatigue and fracture mechanics
- Metallurgy and Material Forming
- Metal Forming Simulation Techniques
- Semiconductor Lasers and Optical Devices
- Risk and Safety Analysis
- Optical Network Technologies
- Combustion and Detonation Processes
- Luminescence and Fluorescent Materials
- Engineering Applied Research
- Covalent Organic Framework Applications
- Advanced Surface Polishing Techniques
- Nanofabrication and Lithography Techniques
- Advancements in Photolithography Techniques
- Microstructure and Mechanical Properties of Steels
- Surface Chemistry and Catalysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Material Properties and Failure Mechanisms
- Graphene research and applications
- X-ray Diffraction in Crystallography
- Non-Destructive Testing Techniques
- Microstructure and mechanical properties
- Crystallization and Solubility Studies
- Supramolecular Chemistry and Complexes
- Surface Treatment and Residual Stress
Okayama University
2018-2025
NTT (Japan)
2016-2024
Osaka Prefecture University
2010-2019
Yokohama National University
2009-2019
Osaka University
2014-2016
Kyushu University
2010-2014
Industrial Technology Center of Okayama Prefecture
2012-2014
ETH Zurich
2007-2014
École Polytechnique Fédérale de Lausanne
2013-2014
Seoul National University of Science and Technology
2014
In light of the considerable impact synthetic 2D polymers are expected to have on many fundamental and applied aspects natural engineering sciences, it is surprising that little research has been carried out these intriguing macromolecules. Although numerous approaches reported over last several decades, synthesis a one monomer unit thick, covalently bonded molecular sheet with long-range ordered (periodic) internal structure yet be achieved. This Review provides an overview analysis how...
A two-dimensional polymer (2DP) based on the dimerization of anthraceno groups arranged in a triptycene motif is reported. photoinduced polymerization performed crystalline state and gives lamellar 2DP via crystal-to-crystal (but not single-crystal to single-crystal) transformation. Solvent-induced exfoliation provides monolayer sheets 2DP. The considered be tiling, mathematical approach that facilitates structural elucidation.
Covalent monolayer sheets in 2 hours: spreading of threefold anthracene-equipped shape-persistent and amphiphilic monomers at the air/water interface followed by a short photochemical treatment provides access to infinitely sized, strictly monolayered, covalent with in-plane elastic modulus range 19 N/m. As service our authors readers, this journal supporting information supplied authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or...
Monolayer sheets have gained attention due to the unique properties derived from their two-dimensional structure. One of key challenges in sheet modification/synthesis is exchange integral parts while keeping them intact. We describe site-to-site transmetalation Zn2+ netpoints cm2-sized, metal–organic by Fe2+, Co2+, and Pb2+. This novel transformation was done both randomly at predetermined patterns defined photolithography create monolayer composed different netpoints. All transmetalated...
To identify the safety issues associated with hydrogen fueling stations, incidents at such stations in Japan and USA were analyzed considering regulations these countries. Leakage due to damage fracture of main bodies apparatuses pipes is mainly caused by design error, that is, poorly planned fatigue. Considering present countries, adequate consideration usage environment very important. from flanges, valves, seals screw joints. If welded joints are be used Japan, strength data for parts...
Abstract Vermutlich werden synthetische 2D‐Polymere auf vielen Gebieten der Naturwissenschaft und Technik Bedeutung erlangen, zwar grundlegende ebenso wie praktische. Daher überrascht es, dass diesem Gebiet bisher so wenige Fortschritte zu verzeichnen sind. In den letzten Jahrzehnten sind viele Ansätze zur Synthese solcher Polymere beschrieben worden, die tatsächliche eines kovalent verknüpften, periodischen, molekularen Films mit Dicke einer Monomereinheit ist jedoch nicht gelungen. Unser...
Oligofunctional terpyridine‐based monomers are spread at an air/water interface, where they connected with transition metal salts such as Fe(II) into mechanically coherent monolayer sheets of macroscopic dimension. The conversions these processes determined by XPS for several monomer/metal ion combinations. transferred onto TEM grids, the 20 × square micrometer sized holes which can be spanned. AFM indentation experiments provide in‐plane elastic moduli compared naturally occurring graphene....
Hydrogen, which is expected to be a popular type of next-generation energy, drawing attention as fuel option for the formation low-carbon society. Because hydrogen energy different in nature from existing technologies, it necessary promote sufficient social recognition and acceptability technology its widespread use. In this study, we focused on effect initiatives improve awareness technology, thereby investigating those participating either several introduction events or professional...
Multiple-energy-fueling stations, which can supply several types of energy such as gasoline, CNG, and hydrogen, could guarantee the efficient use space. To guide safety management hybrid hydrogen–gasoline fueling utilize liquid hydrogen an carrier, scale gasoline pool fires was estimated using hazard assessment tool Toxic Release Analysis Chemical Emissions (TRACE). Subsequently, temperature stress due to distribution were ANSYS. Based on results, storage tanks discussed. It inferred that...
Electrochromism based on structural colours was demonstrated by employing a simple system composed of two-electrode cell, salt-free organic solvent, and nanostructured electroactive soft material. A polyelectrolyte gel, poly(HEMA-co-MAPTA-PF6), with an inverse-opal structure prepared using polystyrene close-packed colloidal crystal as template. The resulting gel swollen in binary solvents exhibited monochromatic colours. colour the altered over entire visible light region changing solvent...
4-Phenylazophenyl methacrylate (AzoMA) and benzyl (BnMA) were copolymerized to produce multistimuli-responsive polymers (P(AzoMA-r-BnMA)s) in a hydrophobic ionic liquid (IL), 1-ethyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide ([C2mim][NTf2]), as the solvent. P(AzoMA-r-BnMA)s with maximum of ca. 4 mol % AzoMA soluble [C2mim][NTf2] at low temperatures, they underwent lower critical solution temperature (LCST) phase separation an increase temperature. Under UV visible light...
A macrocyclic monomer with two opposing 1,8-diazaanthracene units is polymerized in a single crystal by photochemically induced [4 + 4] cycloaddition reaction between neighboring monomers which the anthracene are stacked face-to-face at critical Schmidt distance. The severe structural changes associated this minimized design, wherein linkers photoreactive connected to 4 and 5 positions of latter, whose spatial positioning changed least during dimerization. This helps keep monomer's overall...
The shape-persistent monomer 3 with its three 1,8-diazaanthracene (DAA) units is spread and compressed at the air/water interface layer then converted into a 1.5 nm thick covalent monolayer sheet by photoirradiation under ambient conditions. obtained these extremely mild conditions mechanically stable to carry own weight when spanned over TEM grids. While molecular structure cannot be given yet certainty, it likely result of [4 + 4]-cycloaddition dimerizations between DAA neighboring...
Adequate safety measures are crucial for preventing major accidents at hydrogen fueling stations. In particular, risk analysis of the domino effect stations is essential because knock-on likely to intensify consequences a relatively small incident. Several assessment studies have focused on stations, but none investigated accidental scenarios related such Therefore, purpose this study identify scenario, analyze scenario by using simulations and propose mitigating scenario. hazard...
Hydrogen fueling stations are essential for operating fuel cell vehicles. If multiple safety measures in a hydrogen station fail simultaneously, it could lead to severe consequences. To analyze the risk of such situation, we developed physical model station, which, when using, temperature, pressure, and flow rate be simulated under normal abnormal states. The was validated by comparing analytical results with experimental an actual station. By combining statistical method, evaluated...
An iterative synthesis of a macrocycle with three 1,8-anthrylene units (see picture, R=C6H13) was achieved by using Pd-catalyzed cross-coupling protocols, in which copper-free Sonogashira reaction the key to final cyclization. Photochemical model reactions suggest that has potential undergo photo-induced [4+4] cycloaddition without undesired side reactions, is relevance for ultimate goal creating 2D polymers. Detailed facts importance specialist readers are published as ”Supporting...
New macrocyclic amphiphiles with two or three integrated 1,8-anthrylenes have been synthesized by an iterative Sonogashira cross-coupling protocol. The final cyclization has conducted 80% yield under cuprous-free dilution conditions. Formation of a monolayer at the air/water interface also demonstrated. These results open intriguing possibility to construct large 2D supramolecular/macromolecular systems for which unique photophysical and -chemical properties are expected.