Materials Literature
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The morphology of an epitaxial layer defect has been studied in relation to the layer thickness and size/material type of a foreign particle on the starting substrate of a Si epitaxial wafer with (100) surface. As expected, the edge length of a square‐shaped stacking fault or a crystal disorder on the (100) epitaxial…
The impact of surface inhomogeneities on diffusion kinetics in solids is investigated by assuming that the exchange of the diffusing species takes place at active spots or stripes only. Finite element simulations are analyzed on the basis of analytical approximations. Such lateral inhomogeneities lead to an apparent s…
The ab initio model potential (AIMP) method has been proven to produce effective one-electron operators that accurately represent the embedding effects of the cations and anions that consititute crystalline lattices like the KMgF3, KZnF3, and CsCaF3 cubic fluoroperovskites. The combination of these quantum mechanical…
The binary interaction energies between styrene and various methacrylates were determined from newly examined phase boundaries with lattice–fluid theory. Because the blends of polystyrene (PS) and poly(cyclohexylmethacrylate) (PCHMA) were only miscible at high molecular weights when the blends were prepared by solutio…
The effect of Coulomb interactions between electrons on time-resolved two-photon photoemission from a metal surface is investigated theoretically. It is shown by nonequilibrium perturbation theory that the correlation trace (photoelectron intensity as a function of the pump-probe delay time) depends on lifetimes of bo…
In order to better understand some of the factors likely to affect measurements of KC1 extractable acidity, experiments were conducted using synthetic solutions and extracts from a wide range of contrasting soils. The reagents used for measuring exchangeable acidity (i.e., KC1 and KF) were also examined to evaluate th…
The electronic structure of two types of hydrogen storage materials has been investigated by ab initio band structure methods. We show that the helium produced by the radioactive decay of tritium in a palladium matrix remains stable at the octahedral site of the fcc lattice for He/Pd ratio of at least 0.25. Such He pr…
This paper is concerned with a study of the structure and twisting mechanism of sheath fibres in DREF-3 yarn, in which a tracer-fibre technique was used. The yarn was made from a polypropylene-fibre multifilament core and cotton staple-fibre sheath. An analysis of the twist and migration behaviour of the sheath is mad…
The EFISH technique is well known and widely used to determine the efficiency of the second harmonic generation (SHG) of liquid samples. In the first part of this paper, a simple and convenient experimental setup for EFISH measurements is presented. A standard photometric cell was used and the cell was swiveled during…
A silicon shadow mask for evaporation or sputtering of any shape of patterns was fabricated by Al-Delay Masking Process (DMP). Using DMP, a Si high aspect ratio structure having arbitrary number of multiple-depth can be fabricated. By applying two layers of DMP, Si shadow mask with a mechanical alignment structure was…
A co-doped polyaniline was prepared from aniline camphorsulfonate (ANICSA) and aniline hydrochloride (ANIHCl), which was soluble in common organic solvents, such as m-cresol. Without any additional doping, it possessed a higher conductivity (2 S/cm) than those prepared from ANICSA or ANIHCl alone (0.4 S/cm). In other…
CC individuals, homozygous for the expression of beta(C)-globin, and SC individuals expressing both beta(S) and beta(C)-globins, are known to form intraerythrocytic oxy hemoglobin tetragonal crystals with pathophysiologies specific to the phenotype. To date, the question remains as to why HbC forms in vivo crystals in…
In this work, we made five samples of SrAl 2 O 4 :Eu 2+ , Dy 3+ , the α phase and β phase SrAl 2 O 4 :Eu 2+ , Dy 3+ powder and pellet samples, and α phase single crystal. We have measured the emission spectra of all the samples. All the emission peaks are around 520 nm, which correspond to the transition from 4f 6 5d…
Powder X-ray diffraction experiments on the antiferroelectric phase of PbZrO3 were performed between room temperature and 85K. The crystal structure at 100K was also analyzed by the neutron Rietveld method. Temperature dependence of the antiferroelectric superlattice-reflection intensities can be described well by a p…
Despite advances in the new material technology and clothing designs for protecting firefighters, firefighters may still be burned under routine or ordinary fire fighting conditions. Some theories indicate that moisture in the clothing, resulting both internally from firefighters sweating and externally by hose spray…
Hydrogen microprint technique is a simple and powerful method to visualize hydrogen behavior in metallic materials by using redox reaction between hydrogen and silver bromide. Polished surface of specimens is covered with nuclear emulsion, and silver particles left on the surface after fixing represent sites of hydrog…
The anhysteretic magnetization M/sub an/ depends on the internal field after degaussing H/sub an/ and, possibly, on the demagnetization factor N. Neel's theory of the N dependence is criticized. Classes of Preisach models are identified for which M/sub an/ (H/sub an/) does not depend on N. A numerical method is presen…
The title compound 2 is obtained as bright yellow metastable crystals, which on mechanical grinding change to the dark red stable form; unlike piezochromic compounds, the reverse colour change does not occur; X-ray crystallographic analyses shows that the yellow form has a folded structure while the red form has a twi…
Substantially reduced NOx emissions are obtained in the low temperature catalytic combustion of NH3-bearing simulated biogas by use of a novel 1%Pt/20%CuO/Al2O3-trapping catalyst and cyclic operation between fuel lean and rich conditions.
Potentiostatic slow strain rate tests (SSRT) were performed to investigate the susceptibility to intergranular stress corrosion cracking (IGSCC) of type 304L (UNS S30403) stainless steel (SS) in 288°C water, focusing on corrosion potential and the degree of sensitization. The degree of sensitization was examined by me…