Takeshi Kobayashi

ORCID: 0000-0002-4823-1567
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About
Contact & Profiles
Research Areas
  • Urban and spatial planning
  • Physics of Superconductivity and Magnetism
  • Diamond and Carbon-based Materials Research
  • Semiconductor materials and devices
  • Ionic liquids properties and applications
  • Electronic and Structural Properties of Oxides
  • Land Use and Ecosystem Services
  • Magnetic properties of thin films
  • Urbanization and City Planning
  • Advanced Condensed Matter Physics
  • Magnetic and transport properties of perovskites and related materials
  • Metal and Thin Film Mechanics
  • Advancements in Semiconductor Devices and Circuit Design
  • Solid State Laser Technologies
  • Semiconductor Quantum Structures and Devices
  • Chemical and Physical Properties in Aqueous Solutions
  • Quantum and electron transport phenomena
  • Korean Urban and Social Studies
  • Spectroscopy and Laser Applications
  • Electrochemical Analysis and Applications
  • CO2 Reduction Techniques and Catalysts
  • Financial Crisis of the 21st Century
  • Semiconductor Lasers and Optical Devices
  • Advanced Chemical Physics Studies
  • Thermodynamic properties of mixtures

Osaka University
1997-2024

University College London
2023-2024

Yamaguchi University
2010-2023

University of Stuttgart
2017-2022

Tokyo Denki University
2022

Tohoku Bunka Gakuen University
2012-2021

University of Portland
2021

Toyota Transportation Research Institute
2018-2019

Stuttgart Observatory
2017

Ewha Womans University
2010

Abstract High-throughput, high-accuracy detection of emerging viruses allows for the control disease outbreaks. Currently, reverse transcription-polymerase chain reaction (RT-PCR) is currently most-widely used technology to diagnose presence SARS-CoV-2. However, RT-PCR requires extraction viral RNA from clinical specimens obtain high sensitivity. Here, we report a method detecting novel coronaviruses with sensitivity by using nanopores together artificial intelligence, relatively simple...

10.1038/s41467-021-24001-2 article EN cc-by Nature Communications 2021-06-17

Hydrogenation of diamond has been carried out using the electron-cyclotron-resonance microwave plasma chemical-vapor deposition apparatus. According to reflection high-energy and low-energy electron diffraction X-ray photoelectron spectroscopy measurements, natural- synthetic-diamond surfaces maintained their crystallinity even after hydrogenation. Seebeck effect measurement temperature dependence resistance revealed an appearance deep acceptor levels in hydrogenated layer. The diffusion...

10.1143/jjap.31.l1446 article EN Japanese Journal of Applied Physics 1992-10-01

Aiming to develop the solar cells free from both environmental contaminants and rare metals, thin film were produced by using Cu 2 ZnSnS 4 (CZTS) as an absorber. CZTS films could be successfully formed vapor phase sulfurization of precursors prepared electron-beam evaporation on soda-lime glass substrates. The atomic ratio Cu/(Zn+Sn) was varied nearly 0.5 1.2 investigate influence composition surface morphology optical properties. In order optimize condition, we temperature 510°C 550°C. As...

10.1143/jjap.44.783 article EN Japanese Journal of Applied Physics 2005-01-01

One at a time: A rhodium aqua complex and heterodinuclear iridium–ruthenium (see picture) act as effective catalysts for the photocatalytic two-electron reduction of protons. Hydrogen is produced with aid photosensitizer an electron donor by disproportionation corresponding one-electron-reduced metal complexes. Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted...

10.1002/anie.201004876 article EN Angewandte Chemie International Edition 2010-12-22

Atomistic molecular dynamics simulations of aqueous ionic liquid mixtures were performed in order to compare the resulting Kirkwood–Buff integrals with experimental data and corresponding derived by an inverse approach.

10.1039/c7cp03717a article EN Physical Chemistry Chemical Physics 2017-01-01

Two selected and designed fluorinated cyclic phosphorus(III)-based compounds, namely 2-(2,2,3,3,3-pentafluoropropoxy)-1,3,2-dioxaphospholane (PFPOEPi) 2-(2,2,3,3,3-pentafluoro-propoxy)-4-(trifluormethyl)-1,3,2-dioxaphospholane (PFPOEPi-1CF3), were synthesized comprehensively characterized for high voltage application in lithium-ion batteries (LIBs). Cyclic voltammetry (CV) constant current cycling conducted, followed by post mortem analysis of the NMC111 electrode surface via scanning...

10.1021/acsami.9b03359 article EN ACS Applied Materials & Interfaces 2019-04-09

This work investigates the influence of uncharged interfaces on distribution water molecules in three aqueous dialkylimidazolium-based ionic liquid mixtures at various concentrations. The results are based atomistic molecular dynamics (MD) simulations supported by sum-frequency generation (SFG) experiments. All outcomes highlight an entropically driven accumulation front with slight, but technologically relevant differences. Our findings reveal that local density depends crucially mole...

10.1021/acs.jpcc.9b04098 article EN The Journal of Physical Chemistry C 2019-05-08

This paper presents a novel approach to predicting critical micelle concentrations (CMCs) by using graph neural networks (GNNs) augmented with Gaussian processes (GPs). The proposed model uses learned latent space representations of molecules predict CMCs and estimate uncertainties. performance the on data set containing nonionic, cationic, anionic, zwitterionic is compared against linear that works extended connectivity fingerprints (ECFPs). GNN-based performs slightly better than ECFP when...

10.1021/acs.jctc.3c00868 article EN Journal of Chemical Theory and Computation 2023-10-10

The Egyptian Rousettus bat ( aegyptiacus ) is a common fruit species that distributed mainly in Africa and the Middle East. Bats serve as reservoir hosts for numerous pathogens. Human activities, such hunting bats food, managing vermin, causing habitat loss, elevate likelihood of transmission pathogens to humans other animals. Consequently, cell lines play crucial role research materials investigating viral However, inherent limitation finite division primary cells necessitates use...

10.1002/2211-5463.13781 article EN cc-by FEBS Open Bio 2024-02-19

Capacitance-voltage (\cv) and electron-beam-induced current (EBIC) measurements were performed on metal-insulator-semiconductive (MIS) diamond structures. Utilizing \bto (BTO) as the gate insulator of MIS structures, experimental results indicate pinning Fermi energy at ∼1.7 eV above valence band edge, which is in excellent agreement with 1/3 band-gap rule Mead Spitzer. This due to existence surface states presumably induced by oxygen adsorption. Employing \caf place BTO reduced level a...

10.1143/jjap.34.l551 article EN Japanese Journal of Applied Physics 1995-05-01

ZN orbifold models which have N =1 space-time supersymmetry are cxamined. All gauge groups of classified completely.

10.1143/ptp.82.171 article EN Progress of Theoretical Physics 1989-07-01

3 Metalle, 2 Elektronen, 1 H2: Ein Aquarhodiumkomplex und ein Iridium-Ruthenium-Komplex (siehe Bild) wirken als effektive Katalysatoren für die photokatalytische Zwei-Elektronen-Reduktion von Protonen. Wasserstoff wird mithilfe eines Photosensibilisators Elektronendonors erzeugt, indem um Elektron reduzierten Metallkomplexe disproportionieren. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...

10.1002/ange.201004876 article EN Angewandte Chemie 2010-12-22

Abstract In the quest for ever higher energy and power densities of lithium‐based batteries, numerous functional materials are being utilized, however in many cases their highly reactive nature is likely to increase risk danger case battery failures. This especially affects aprotic non‐aqueous organic carbonate‐based electrolyte, still considered as state‐of‐the‐art (SOTA) its volatile flammable components. Efforts identify different forms flame‐retardants or nonflammable electrolyte...

10.1002/celc.202000386 article EN cc-by ChemElectroChem 2020-03-16

Epitaxial (100)SrTiO3 (STO) thin films were grown successfully on (100)La0.7Sr0.3MnO3/(100)MgO substrates by eclipse pulsed laser deposition in (O2+Ar) ambient gas. The droplet-free STO showed marked improvement their permittivity, 320ε0 at room temperature. Time-resolved plume observation and spectrum measurement suggested that the was due to effective excitation ionization of growth species with aid coexisting Ar. also nonlinear permittivity against applied field, as commonly observed...

10.1063/1.367363 article EN Journal of Applied Physics 1998-05-15

Planar-type Al/(100)SrTiO 3 /(001)YBa 2 Cu O y metal-insulator-superconductor field-effect transistors (MISFETs) were investigated experimentally and theoretically. The applied gate field induces the change of carrier concentration in YBa channel (or conducting layer thickness), which turn modulates critical current J c through flux-creep model flux-flow resistivity ρ t Bardeen-Stephen model. Theoretical results explained, to a certain extent, observed effect MISFET semiquantitatively.

10.1143/jjap.31.l1342 article EN Japanese Journal of Applied Physics 1992-09-01

SrTiO 3 (STO) thin films were prepared by an ArF excimer laser deposition method. At the growth temperature of 630°C, natural orientation STO was significantly changed from (111) to (100) and (110). The ratio X-ray diffraction intensities (100)/(200) closest ideal value when grown at 660°C, resulting in minimized disorder atomic arrangement. Epitaxial obtained on STO(100) MgO(100) substrates, YBaCuO(001) epitaxial film. They showed resistivity excess 5×10 10 Ω·cm dielectric constant as high...

10.1143/jjap.31.l511 article EN Japanese Journal of Applied Physics 1992-04-01

A heterodinuclear iridium−ruthenium complex [IrIII(Cp*)(H2O)(bpm)RuII(bpy)2](SO4)2 (Cp* = η5-pentamethyl-cyclopentadienyl, bpm 2,2′-bipyrimidine, bpy 2,2′-bipyridine) acts as an effective catalyst for removal of dissolved O2 by the four-electron reduction with formic acid in water at ambient temperature.

10.1021/ja104486h article EN Journal of the American Chemical Society 2010-08-05

This paper proposes a theoretical design for superconductor-base hot-electron transistor (Super-HET), new device which can be regarded as one of the ultimate transistors. Our study reveals that Super-HET with GaAs/Nb-based compounds/InSb/metal structure has excellent characteristics, although it works only in limited temperature range. The total current transmission coefficient and maximum oscillation frequency are predicted to more than 96% excess 1000 GHz, respectively. estimation...

10.1143/jjap.25.705 article EN Japanese Journal of Applied Physics 1986-05-01

Predicting the behaviour of solutions with surfactants significantly different critical micelle concentration (CMC) values remains a challenge. The study molecular interactions within micelles and interfaces in surfactant combinations used everyday products is essential to understand these complex systems. In this work, equilibrium dynamic surface tension presence mixed non-ionic (tristyrylphenol ethoxylates) anionic (sodium benzene sulfonate alkyl chain lengths C

10.1039/d3sm01454a article EN cc-by Soft Matter 2023-12-20

We investigated the film spreading during evaporation of submillimeter oil-in-water emulsion droplets on a solid surface, and observed novel phenomenon where follows two-layer spreading. In combination with instability at front, front acquires flowerlike pattern. The emergence structure is attributed to micelles within oil that yield an oscillating disjoining pressure. By considering both slipping condition pressure, scaling analysis carried out agrees well dynamics. Tanner's law initially,...

10.1103/physrevlett.133.174001 article EN cc-by Physical Review Letters 2024-10-23

Abstract Supported ionic‐liquid phase (SILP) technology in a biphasic setting with n ‐heptane as the transport was applied to Ru‐alkylidene‐N‐heterocyclic carbene (NHC) catalyzed macrocyclization of α , ω ‐dienes elucidate effect ionic liquid (IL)‐film thickness, flow rate well substrate and product concentration on efficiency, Z ‐selectivity. To understand molecular‐level behavior substrates products at ‐heptane/IL interphase, atomistic molecular dynamics simulations were conducted...

10.1002/chem.202403237 article EN cc-by Chemistry - A European Journal 2024-11-25
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