A5076137369- Analytical Chemistry and Sensors
- X-ray Diffraction in Crystallography
- Magnetic Properties and Synthesis of Ferrites
- Physics of Superconductivity and Magnetism
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- Iron oxide chemistry and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor Quantum Structures and Devices
- Advanced Condensed Matter Physics
- High-pressure geophysics and materials
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Water Quality Monitoring and Analysis
- Magnetic and transport properties of perovskites and related materials
- Crystal Structures and Properties
- Crystallography and Radiation Phenomena
- Advanced X-ray Imaging Techniques
- Microfluidic and Capillary Electrophoresis Applications
- Planetary Science and Exploration
- Quantum and electron transport phenomena
- Electron and X-Ray Spectroscopy Techniques
- Solid-state spectroscopy and crystallography
- Rare-earth and actinide compounds
Tohoku University
2010-2025
NTT Basic Research Laboratories
2012-2024
Tokyo University of Technology
2004-2024
Thermo Fisher Scientific (Japan)
2021-2022
The University of Tokyo
1994-2021
Tokyo Institute of Technology
2006-2018
University of Tokyo Health Sciences
2018
Okayama University
2014-2017
NTT (United States)
2006-2015
Thermo Fisher Scientific (Israel)
2014
Based on accurate X-ray diffraction intensity data collected from spherically shaped single crystals, detailed electron-density distributions have been studied for synthetic mono-oxides, Mg0 (periclase), Mn0 (manganosite) , CoO, and Ni0 (bunsenite) .Mg0 (Sanger, 1969; Vidal-Valat Vidal,1978) MnO, Coo the NaCI type structure at room temperature.Although is rhombohedral below a Neel temperature 523°K (Rooksky, 1948;Vernon, 1970) due to antiferromagnetic distortion structure, negligible...
The single‐crystal elastic moduli of the spinel (gamma) phase Mg 2 SiO 4 have been experimentally determined from Brillouin spectroscopy at ambient conditions. They are C 11 = 327, 44 126, and 12 112 (GPa) yielding a bulk modulus 184. shear 119 GPa. This value is lower than expected previous measurements. properties modified (beta) phases quite similar with greatest differences related to c axis beta which relatively soft under compression. polycrystal 1ine acoustic velocities differ by only...
The single-crystal elastic moduli of the modified spinel structure (beta phase) magnesium orthosilicate (Mg(2)SiO(4)) have been measured by Brillouin spectroscopy under ambient conditions. Single crystals with dimensions up to 500 micrometers were grown at 22 gigapascals and 2000 degrees C over a period 1 hour. Growth larger than 100 was achieved only when pressure within 5 percent phase boundary separating beta- gamma-phase stability fields. A comparison properties those olivine suggests...
In the ZrO 2 -YO 1.5 solid solutions, phase changes among cubic (Fm3m, Z=4), t″ form and t' were investigated by neutron X-ray powder diffraction, where forms are defined as tetragonal phases (P4 /nmc, Z=2) with axial ratios of c/a f =1 >1, respectively, which prepared a diffusionless transition from high-temperature during quenching. is lattice parameter pseudo-fluorite cell
A liquid-junction Ag/AgCl reference electrode was microfabricated. silver thin-film pattern covered with a polyimide protecting layer 50-μm-wide slit at the center of pattern, and AgCl grown from there into layer. liquid junction formed photocurable hydrophilic polymer. The electrolyte by screen-printing paste containing fine KCl powder. silicone rubber passivation entire area except for pad end junction. novel element could maintain its expected potential longer than 30 h in saturated...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComputation and management of chemical properties in CACTVS: An extensible networked approach toward modularity compatibilityWolf Dietrich Ihlenfeldt, Yoshimasa Takahashi, Hidetsugu Abe, S. SasakiCite this: J. Chem. Inf. Comput. Sci. 1994, 34, 1, 109–116Publication Date (Print):January 1994Publication History Published online1 May 2002Published inissue 1 January...
Great improvement in the output power density of diamond FETs on a homoepitaxial layer grown using high-purity source gas is reported. For device with gate length 0.1 µm and width 100 µm, at 1 GHz, maximum 2.1 W/mm, gain 10.9 dB, added efficiency 31.8% were obtained.
Based on accurate X-ray diffraction intensity data collected from spherically shaped single crystals, net atomic charges and electron density distributions have been studied for MnO, Mn2SiO4, Mg2Si2O6, LiAlSi2O6 CaMgSi2O6. Examination of various procedures determining in a given structure has led to the conclusion that following approach appears be most reliable. (1) For cations: number electrons sphere radius ER, effective distribution radius, which is defined according characteristics...
The crystal structure of the spinel polymorph Mg 2 SiO 4 has been refined using a single synthesized at 220 kbar and 1000°C. u parameter with = 8.0649(1) Å is 0.3685(6). Although refinement indicates some cation disorder in spinel, results are not definitive because similarity scattering factors Si. average Si‐O Mg‐O distances 1.655(4) 2.070(4) Å, respectively. final R w values 0.048 0.040 for 41 reflections up to sin θ/λ 1.0.
We present a case for the exploration of Venus as an astrobiology target—(1) investigations focused on likelihood that liquid water existed surface in past, leading to potential origin and evolution life, (2) into habitable zones within Venus' present-day clouds Venus-like exo atmospheres, (3) theoretical how active aerobiology may impact radiative energy balance (4) application these investigative approaches toward better understanding atmospheric dynamics habitability exoplanets. The...
Magnetoabsorption spectra of the lowest-energy excitons in a layered perovskite-type material (${\mathrm{C}}_{6}$${\mathrm{H}}_{21}$${\mathrm{NH}}_{3}$${)}_{2}$${\mathrm{PbI}}_{4}$ have been measured under pulsed high magnetic fields up to 42 T at 4.2 K Faraday configuration (E\ensuremath{\perp}c\ensuremath{\parallel}B) and Voigt (E\ensuremath{\perp}c\ensuremath{\perp}B). Energy shifts splittings for observed this material. For configuration, Zeeman splitting with small diamagnetic has...
Abstract III-V semiconductors have been intensively studied with the goal of realizing metal-oxide-semiconductor field-effect transistors (MOSFETs) high mobility, a on-off ratio, and low power consumption as next-generation designed to replace current Si technology. Of these semiconductors, narrow band-gap semiconductor InAs has strong Rashba spin-orbit interaction, thus making it advantageous in terms both transistor (FET) performance efficient spin control. Here we report high-performance...
The use of 10<sup>13</sup> Ω amplifiers enabled high precision Pb isotope analysis <italic>in situ</italic> using UV femtosecond MFC-ICPMS.
The aim of the present study was to prove hypothesis that acid-etched pure titanium implants with applied calcium modification obtains remarkably high osteogenic activity and stability in osseous tissue. To evaluate surface structure implants, we performed scanning electron microscopy analysis, color 3D laser X-ray photoelectron spectroscopy analysis. examine biocompatibility treatment inserted into rat long bones insertion removal torque values, Periotest value, intensity alizarin red...
Neutron and high-resolution synchrotron x-ray diffraction measurements have indicated a tetragonal zirconia phase with both an axial ratio of unity internal shear deformation: The oxygen displacements from ideal fluorite positions 0.088 0.078 Å are observed for 65 70 mol % CeO2–ZrO2 samples, respectively, although c/a values 1.000±0.001. decreases increasing CeO2 content discontinuously to around 60 composition, while the displacement continuously up about 90 CeO2.
Stable water-soluble diammonium tris(2-hydroxypropionato)titanate(IV) [ammonium trilactatotitanate(IV)], (NH4)2[Ti(C3H4O3)3], was prepared in the crystalline form. According to X-ray single-crystal diffraction data, this compound crystallizes cubic cell with a = 11.649(4) Å, space group P213 (no. 198), and has Z 4 molecules per unit cell. The 13C NMR data Raman IR spectra support determined structure. absence of nonbonded functional groups restricts formation oligomers contrast reported...
The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. measures, using an oxygen electrode, decrease dissolved given sample resulting from photocatalytic oxidation the organic compounds therein. As photocatalyst, titanium dioxide (TiO2) fine particles adsorbed on translucent poly(tetrafluoroethylene) (PTFE) membrane was used. electrode with attached its tip used as probe. operation characteristics are demonstrated artificial wastewater real...