Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnergetics of surface reactions on (100) diamond planeDaoyang Huang and Michael FrenklachCite this: J. Phys. Chem. 1992, 96, 4, 1868–1875Publication Date (Print):February 1, 1992Publication History Published online1 May 2002Published inissue 1 February 1992https://pubs.acs.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelative basicities of the oxygen sites in [V10O28]6-. An analysis of the ab initio determined distributions of the electrostatic potential and of the Laplacian of charge densityJean Yves Kempf, Marie Madeleine Rohmer, Josep Maria Poblet, Carles Bo, and Marc BenardCite this:…
The stability of uniaxial nematic-liquid-crystalline structures in supra-\ensuremath{\mu}m-size spherical cavities that impose a weak homeotropic anchoring is studied theoretically. The equilibrium equations are obtained with the minimization of the deformation, surface, and field contributions to the free energy and…
High-resolution electron-microscopy experiments are combined with computer simulations of tilt grain boundaries (GBs) in Au to investigate the preferred GB planes in ∑ = 9 and ∑ = 11 bicrystals. The energies calculated for a variety of symmetric and asymmetric GBs suggest that asymmetric GB-plane orientations are ofte…
Abstract Complex X-ray diffraction (XRD) profiles are described crystallographically by simulating XRD peaks for each phase, and adding the various elementary patterns to fit the experimental X-ray pattern. X-ray patterns of a ground muscovite and three polyphasic diagenetic I/S samples are fitted with this powerful,…
Catalysis research underpins the science of modem chemical processing and fuel technologies. Catalysis is one of the most important technologies commercially in national economies. Solid-state heterogeneous catalyst materials such as metal oxides or metal particles on ceramic oxide substrates are most common. They are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric epoxidation of olefins catalyzed by manganese complexes of chiral "strapped" porphyrins with diastereotopic faces. A novel strategy for stereochemical modeling of the active site of cytochrome P-450Katsuaki Konishi, Kenichiro Oda, Kei Nishida, Takuzo Aida, and Sho…
The reaction of La 1‐ x Ca x MnO 3 ( x = 0, 0.1, 0.2) with ZrO 2 ‐8 mol% Y 2 O 3 (YSZ) has been investigated at temperatures ranging from 1300° to 1425°C in air. Substitution of Ca for La in LaMnO 3 depresses the reactivity with YSZ. A layer of La 2 Zr 2 O 7 is formed at the La 1‐ x Ca x MnO 3 /YSZ interface after an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of hydrophobically modified hydroxyethyl cellulose with various added surfactantsR. Tanaka, J. Meadows, P. A. Williams, and G. O. PhillipsCite this: Macromolecules 1992, 25, 4, 1304–1310Publication Date (Print):February 1, 1992Publication History Published online…
The systematic study of band-edge luminescence in pseudomorphic Si/Si1−xGex/Si double-heterostructure layers is reported for a wide composition range, 0.12<x<0.24, for the first time. An analytical expression for the exciton energy gap at 4.2 K valid for x<0.24 is derived from the no-phonon line e…
New end‐capped oligothiophenes (see figure) have been synthesized via nickel‐catalyzed Grignard cross‐coupling reaction. Dueto the reactive positions in the terminal thiophene units being blocked it is possible to accurately characterize the spectroscopic and electrochemical properties of the materials. Estimation of…
The hot workability of an M2 type HSS in cast, forged and rolled condition has been studied by means of a torsion test and metallography. Continuous tests were used to determine the temperature and strain-rate dependence of the flow stress and temperature dependence of the strain to fracture, while multistage tests we…
Two types of silk substrate have been examined and optimum conditions for degumming with tartaric acid determined. The experiments have been carried out according to the Box and Behnken response surface design. The degumming action often other organic acids has also been evaluated.
Seven alloys for deep sour gas wells were evaluated for sulfide stress cracking resistance by the double cantilever beam (DCB) method. Representatives of 20 laboratories participated in one or both of two round-robin testing programs. These were conducted in support of the successful effort to include the DCB test in…
The hydration behavior at 25°C of β‐dicalcium silicate synthesized from hillebrandite (Ca 2 ,(SiO 3 )(OH) 2 ) at 600°C was studied over a period of 224 d. The hydration rate of the β‐dicalcium silicate having fibrous crystals with specific surface area of 7 m 2 /g is extremely rapid. For water/solids ratios of 0.5 and…
Summary This paper presents a reliable model for the solubility products of scale-forming minerals. Our model solubilities are in relatively good agreement (±5% to 10%) with the most reliable solubilities in aqueous solutions of up to twice the seawater concentration at temperatures of 20 to 150°C and pressures up to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsic (gas-phase) basicity of some anionic bases commonly used in condensed-phase synthesisDeborah Thomas Grimm and John E. BartmessCite this: J. Am. Chem. Soc. 1992, 114, 4, 1227–1231Publication Date (Print):February 1, 1992Publication History Published online1 May 2002…
Aluminum-doped zinc oxide films were prepared on Corning 7059 by an inexpensive spray pyrolysis technique. Variation in structural, electrical and optical properties with doping concentration is investigated in detail. The films were highly transparent to the visible radiation and electrically conductive. X-ray diffra…
Abstract Bi 2 Se 3 single crystals were prepared in the electron concentration range from 1.8 × 10 19 to 5.6 × 10 19 cm –3 . At room temperature experimental values are given for the specific electrical resistivity, for the Hall and Seebeck coefficients, and the ir‐plasma reflectivity spectra were measured in the wave…
The ir amide bands of the triple-helical polytripeptides and collagens upon hydration of films are investigated. On the basis of our assignment of the amide I components, the formation of hydrogen bonds between the peptide backbone and structural water is studied. The C1O1--HOH hydrogen bonds are found more ordered th…