Materials Literature
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Silylation reactions using liquid and supercritical CO 2 as the solvent were performed on both single surface (silicon wafers) and nanoporous (silica gel) silica samples. The alkylsilyl monolayers formed on single surfaces were characterized by wettability, ellipsometry, and X-ray photoelectron spectroscopy. Modified…
Partial Fischer esterification of poly(acrylic acid) allows tailoring of the hydrophobicity and charge density of multilayered films containing poly(allylamine hydrochloride) (PAH) and derivatized poly(acrylic acid) (d-PAA). As hydrophobicity and charge density strongly affect film permeability, control over these pro…
As high-throughput experimental techniques have become common in the area of materials research, entirely new types of experimental strategies have appeared. The kinds of problems, the desired outcomes, and the appropriate patterns are significantly different from those associated with conventional experimentation. Cl…
A few years ago we developed a new kinetic method for following transition-metal nanocluster formation in which the resultant nanocluster's catalytic activity was used as a reporter reaction via the pseudoelementary step concept. This method in turn yielded insights into a new, broadly applicable mechanism of nanoclus…
Hot solutions (>80 °C) of N -dodecanoyl- ( d - or l -) serine in toluene or water were cooled to room temperature to give gels and were then vitrified for cryo-TEM investigations. Electron micrographs showed multilamellar aggregates with a repetitive density profile of 33 Å as constituents of tubules and vesicles in t…
Adsorption and surface reactions of acetone vapor were observed on the title oxides at room and higher temperatures (up to 400 °C), using in situ infrared spectroscopy. The results were correlated with results of infrared spectroscopy of adsorbed pyridine, to assess impacts of the surface acid−base properties. It was…
For the implementation of internal dosimetry in workplaces based on individual monitoring, information that relates the measurement results with the intake of radionuclides is required. The present work provides electronic look-up tables as a PC based support system for internal dosimetry. The tables contain the compu…
We report a detailed study of the formation of semiconductor nanoparticles of the important compound ZnS and its Mn-doped variant ${\mathrm{Zn}}_{(1\ensuremath{-}x)}{\mathrm{Mn}}_{x}\mathrm{S}$ inside reverse micelle microreactors, by carefully varying the size of the reverse micelles at a fixed Mn concentration with…
We report on a comprehensive study of the electronic structure of the layered semiconductor $1T\ensuremath{-}{\mathrm{HfS}}_{2}.$ The occupied and unoccupied band structure has been investigated by combined angle-resolved photoemission and inverse photoemission. The results are discussed in the context of a fully rela…
The appearance of additional states of an impurity under high doping levels is discussed. On the basis of a Fermi level calculation, a model for the conductivity of heavily boron-doped diamond is proposed. This model allows one to reproduce the temperature dependence of the conductivity and of the Hall coefficient for…
The results of investigations of intercalated compounds ${\mathrm{Cr}}_{x}{\mathrm{TiSe}}_{2}$ and ${\mathrm{Co}}_{x}{\mathrm{TiSe}}_{2}$ by x-ray photoelectron spectroscopy and x-ray emission spectroscopy are presented. The data obtained are compared with theoretical results of spin-polarized band-structure calculati…
We simulate solidification in a narrow channel through the use of a phase-field model with an adaptive grid. In different regimes, we find that the solid can grow in fingerlike steady-state shapes, or become unstable, exhibiting unsteady growth. At low melt undercoolings, we find good agreement between our results, th…
A mean rate controllable random pulser to use for a random pulse train simulator is presented in this paper. The control of the men rate is practiced with a personal computer by referring to the look-up table of time-variant rate. The random pulser with present design can be used as a model to simulate the random puls…
In the present work, the cohesive energy, energy fluctuation and Mulliken’s population of metal cluster have been calculated by the extended Hückel method. The behaviors of alloying elements and the stability of Mg alloys at high temperatures have been discussed by comparing the calculated results with the actual expe…
Eutectic composite of Al2O3/Y3Al5O12 (YAG) was prepared by an arc discharge method and its microstructure and stability were investigated. The eutectic composition of Al2O3/YAG determined by electron probe micro analysis (EPMA) was Al2O3:Y2O3=81.6:18.4mol%. Basic eutectic microstructure was a twinned single crystal of…
Environmental concern decreases consumption of organic solvents as a global trend. Silicones for release coating are also requested to move to solventless type from solvent type. In fact 80% of silicones for release coating application is already solventless type in North America and Europe. On the other hand, solvent…
The In-Ti active fillers were examined for joining metallic copper (Cu) to aluminum nitride (AlN) ceramics. Brazing was carried out with In-Ti active brazing filler metals with various compositions, and the microscopic structure and mechanical strength of the Cu-filler-AlN-filler-Cu joint at various temperatures were…
In a design of optical multilayer films at oblique incidence, reflectance and transmittance curves for two planes of polarizations (S and P polarizations) are different, so a large number of layers are required more than at normal one. Therefore the design process will be more complex. We have already developed the op…
It is said that in hot-rolling titanium surface defects are apt to occur by seizures between rolls and products. Authors have examined the effects of temperatures and lubricants on the tribological behavior of titanium strip surfaces contact with rolls using a hot rolling and sliding wear tester with commercially pure…
The results of the synthesis and the investigaiton of a number of multipodal and branched siloxane and silsesquixane liquid crystals is reported.