Materials Literature
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Measurements of the electrical conductivity and thermoelectric power of CuInTe2 in the temperature range from 400°C to 970°C shows that the thermoelectric power changes sign from positive in the solid state to negative in the liquid state above its melting point. The experimental data were explained on the basis of a…
Thin, nonporous films of bismuth ruthenium oxide having the pyrochlore crystal structure were prepared by ion beam deposition. The films were grown on metal disks machined to fit into a rotating ring‐disk electrode. The electrocatalytic properties of these films for O 2 reduction and evolution were studied in 1 M KOH…
Myosin light-chain kinase is responsible for the phosphorylation of myosin in smooth muscle cells. In some tissue types, the C-terminal portion of this large enzyme is expressed as an independent protein and has been given the name telokin. Recently, an antibody directed against telokin was found to interact with a pr…
A numerical algorithm is presented for analyzing plane‐wave diffraction by a doubly periodic grating whose surface profile is corrugated periodically in two directions. The algorithm is based on the Yasuura method: diffracted fields are expanded in terms of Floquet modes for doubly periodic structures, and the expansi…
When the gamma dose rate around an irradiated nuclear reactor fuel element is calculated, it is important to know the attenuating characteristics of the fuel element itself one of them being the buildup factor. Exposure buildup factors of uranium dioxide (UO2) for ten gamma-ray energies (0.050 to 10.0 MeV) have been c…
Article Phase Equilibria in the Aluminium-rich Portion of the Binary System Co-Al and in the Cobalt/Aluminium-rich Portion of the Ternary System Co-Ni-Al / Phasengleichgewichte im aluminiumreichen Teil des binären Systems Co-Al und im kobalt-aluminiumreichen Teil des ternären Systems Co-Ni-Al was published on November…
We study a novel surface superlattice structure formed by a honeycomb gate pattern on GaAs/AlGaAs heterostructures with a high-mobility two-dimensional electron gas. The hexagonal gate arrays, fabricated by electron beam lithography, had pitches as small as 150 nm, corresponding to hexagons with 87 nm between adjacent…
Films of a single polyimide having a rodlike molecular skeleton of uniform thickness were prepared on silicon and quartz substrates under several different heating rates during the thermal curing cycle. The molecular orientation in the cured polyimide film was evaluated by polarizing infrared and visible light investi…
A numerical method for obtaining the vibrating sample magnetometer (VSM) sensitivity functions due to a uniformly magnetized sample in the shape of ellipsoid, cuboid or cylinder, and then calculating the induced voltage in a VSM detection coil systems is presented. The induced voltage, which depends on the equilibrium…
Sodium sulphate is produced mainly from land ores by conventional crystallization methods of evaporation and dehydration; these sources are fast being exhausted and new processes should be found which do not use the conventional sources. Seawater bittern produced as by-product from solar halite plants contains about 6…
An experiment on Raman scattering in porous silicon containing a regular system of quantum wires reveals a shift of the phonon frequencies of the silicon lattice toward higher energies. The effect is interpreted as a manifestation of a compressed state of the material in the quantum wires. It is shown that the observe…
We present efficient blue electroluminescence devices based on pure soluble poly(paraphenylene) polymers and poly(phenylene) oligomers. Highly efficient green and red emission light is produced with a new color conversion technique by pumping fluorescent dye layers with blue organic light-emitting diodes. The high int…
Heat capacity measurements have been made in the temperature range 1-310 K for a phasonless perfect quasicrystal Al65Cu20Ru15, an Al65Cu20Ru15 quasicrystal with phason disorder, and a crystal approximant Al70Cu20Ru10. The electronic heat capacity of the perfect quasicrystal was found to be essentially zero. The existe…
Abstract Low temperature spectroelectrochemistry was performed to generate highly reduced σ‐alkyl iron porphyrins, which were unstable at room temperature and oxygen sensitive. Suitable conditions for obtaining a stable compound were provided by keeping the thin‐layer cell under strictly anaerobic conditions. To calib…
Article Redetermination of the crystal structure of tris(acetylacetonato)iron(III) (ferric acetylacetonate), C30H42Fe2O12 was published on November 1, 1996 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 211, issue 11).
Extending the usable bandwidth of shape memory alloy actuators for vibration control is investigated, both analytically and experimentally. The differential actuator, which uses SMA wires in agonist-antagonist pairs, is a potential solution. Simulation shows that only modest power requirements are necessary to achieve…
The interfacial activity of 2-hydroxy-5-l-butylbenzophenone (E)-oxime (HBBO), two model a-acyloin oximes: 9-hydroxy-8-hexadecanone oxime (HHO) and 13-hydroxy-12-tetracosanone oxime (HTO), and a model modifier such as p-tertbutylphenol (BPh) is investigated at toluene/ water interface, at 21°C. Interfacial tension isot…
Abstract The Raman spectrum of icosahedral α‐boron presents a very sharp peak at 525cm −1 that was consistently rejected from the lattice modes but is still unexplained. New Raman scattering experiments under pressure are compared with ab‐initio lattice dynamics calculations. The very good agreement of the mode freque…
Abstract At ambient pressure the phase transition in hydrogen-bonded ferroelectric crystals of the (KDP stands for KH2PO4) is a combined effect of atomic displacements and of proton disordering in hydrogen bonds. It is shown, that the occurrence of tricritical point in these materials result from the competition betwe…
We have studied the temperature evolution of the optical absorption and Raman scattering spectra of a trans-cis blend of “soluble” polyacetylene in a polyvinylbutyral/butanol mixture. On decreasing temperature a reversible restructuring of the electronic and lattice systems of trans -(CH) x occurs: the electronic ener…