Materials Literature
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Thin-film photodiodes with the graded-composition structures of amorphous Se–As–Te have been developed. The physical mechanism of the buit-in-field effect in these highly resistive photodiodes has been clarified. In order to realize complicated composition distributions, multi-layer evaporation technology has also bee…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPatterns of three-liquid-phase behavior illustrated by alcohol-hydrocarbon-water-salt mixturesB. M. Knickerbocker, C. V. Pesheck, H. T. Davis, and L. E. ScrivenCite this: J. Phys. Chem. 1982, 86, 3, 393–400Publication Date (Print):February 1, 1982Publication History Publishe…
The excitation and emission spectra of YAl3B4O12 doped with Ce3+ and Bi3+ are reported. The Bi3+ emission spectrum at 4.2 K consists of a zero-phonon line associated with equidistant phonon sidebands. This emission is assigned to the P03→S01 transition. The intensity of the zero-phonon line is due to the mixing of the…
A homogeneous (planar) alignment of nematic liquid crystal on an optically uniaxial substrate, the optic axis of which is parallel to the surface plane, is considered. Based on the macroscopic theory of van der Waals forces, the contributions of the electrostatic dipolar forces and the dispersion force of the interfac…
Abstract The nature of Cu 2+ adsorption by boehmite, gibbsite, and noncrystalline alumina was studied over a range of equilibrium pH (4.5–7.5) and Cu 2+ concentration (10 −3 –10 −8 M) by electron spin resonance (ESR). Available chemisorption sites at pH 4.5 were the most numerous for noncrystalline alumina (~1 mmole/1…
Some four thousand years ago man discovered glass in the embers of a fire built somewhere in the deserts of the Near East. A few years from now ultratransparent glass fibers will be transmitting more information than copper wires. Thus glass is at once both one of the oldest and one of the newest materials known to ci…
The domain structure of a typical antiferroelectric substance, lead zirconate, is examined in detail fori the first time by electron diffraction and electron microscopy. The 90° and 60° domain configurations can be consistently understood on the basis of the pseudo-cubic unit cell. 180° domains, which are characterist…
A method is described for measuring the electrostatic charge generated in powders following contact with a plane substrate. The method uses a Faraday well connected to an electrometer and allows the specific charge of powders to be determined. Of the various drugs and excipients studied, most charged electronegatively…
We conducted chemical and clay mineralogical studies on Ando soils, Brown forest soils, and Podzolic soils that had been formed mainly from felsic Towada-a (1000 B.P.) and Chuseri (4000 B.P.) ashes under different climates and vegetation. Organic carbon accumulated remarkably in the humus horizons of all the soils and…
Phase diagrams for a model fcc binary alloy with first- and second-neighbor interactions are calculated in the tetrahedron-octahedron approximation of the cluster-variation method. The calculations are carried out for two values of the ratio of second- to first-neighbor pair interactions in the range of 0 to 0.5, wher…
The effect of the x-ray flux in x-ray photoelectron spectroscopy (XPS) on the constitution of the polytetrafluoroethylene (PTFE) surface has been examined. The radiation dose rate for our specimen was ∠107 rad/s. We observed the structure, magnitude and binding energy of the C(1s) and F(1s) features of the XPS spectru…
The static and dynamic characteristics of the incommensurate phases of barium sodium niobate have been investigated by means of elastic and inelastic neutron scattering between room temperature and 660\ifmmode^\circ\else\textdegree\fi{}C. The observation of two incommensurate phases on heating from room temperature is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange in imidazolate-bridged copper(II) complexesGary Kolks, Stephen J. Lippard, Joseph V. Waszczak, and Henry R. LilienthalCite this: J. Am. Chem. Soc. 1982, 104, 3, 717–725Publication Date (Print):February 1, 1982Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic polymerization of acetylenes and olefins by tetrakis(acetonitrile)palladium(II) ditetrafluoroborateAyusman Sen and Ta Wang LaiCite this: Organometallics 1982, 1, 2, 415–417Publication Date (Print):February 1, 1982Publication History Published online1 May 2002Publis…
Abstract Poly(caprolactone) (PCL)/poly(vinyl chloride) (PVC) blends are known to be miscible in the solid state. Recents measurements however indicate that a large number of polyesters are also miscible with PVC if the ratio CH 2 /CO of the polyester is between 4 and 10. At low CH 2 /CO ratios, polyesters are too ri…
Aluminium stearate is a fine, bulky, odourless and colourless powder forming a plastic mass when heated, having the properties both of organic and inorganic matter. It embraces most of the characteristics of other metallic stearates and is regarded as the most important of these. Several studies of the material have a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of chloro(2,2,4,4-tetramethylpiperidinyl-1-oxo-O,N)(triphenylphosphine)palladium(II), a metal complex of a reduced nitroxyl radicalMichael H. Dickman and Robert J. DoedensCite this: Inorg. Chem. 1982, 21, 2, 682–684Publication Date (Print):February 1, 1982Publicati…
Crystal data for α-, β- and γ-Ag2WO4 were collected from Cu Kα1 powder diagrams, α-Ag2WO4 is orthorhombic (Pn2n) with a = 10.820(2), b = 12.018(2) and c = 5.900(1) Å. β-Ag2WO4 is hexagonal (P63 or P63/m) with a = 11.0925(3) and c = 7.5424(4) Å. γ-Ag2WO4 is cubic (Fd3m, spinel type) with a = 9.352(1) Å.
A simple but rigorous chain-matrix analysis is used to determine the plane-wave diffraction efficiencies and angular selectivities of planar pure-reflection gratings (zero-slant angle) of arbitrary thickness, arbitrary-starting and arbitrary-ending conditions, and arbitrary incidence angle. The results from rigorous c…
The two-dimensional diffraction of a long surface wave by a deformation of the bottom is calculated through a conformal-mapping algorithm (Kreisel 1949). The result is applied to obtain the complex reflection coefficient for a rectangular trench. The corresponding reflection coefficient for oblique incidence is obtain…