Materials Literature
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Abstract The interface between ZnO/Si and ZnO/SiO 2 was studied by etching through the junction region and analyzing XPS and Auger LMM spectra. By comparing XPS shifts and peak splitting in the Si2p spectra, chemical complexes of the form Si—O x —Zn ( x ≃1) were identified at the ZnO/Si interface. The transition from…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterpretation of polymer properties in terms of chain conformations and spatial configurationsJames E. MarkCite this: Acc. Chem. Res. 1979, 12, 2, 49–55Publication Date (Print):February 1, 1979Publication History Published online1 May 2002Published inissue 1 February 1979ht…
<div class="htmlview paragraph">Recent developments of high performance ceramics have given a new impetus for the advancement of heat engines. The thermal efficiencies of the Otto, Diesel, Brayton and the Stirling cycle can now be improved by higher operating temperatures, reduced heat loss, and exhaust energy r…
<div class="htmlview paragraph">An experimental investigation was made to determine the effect of torch nozzle orientation on burn rate, power, fuel consumption and exhaust emissions. With the torch nozzle directed diametrically across the combustion chamber the burn rate and the power were maximized. Exhaust em…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and crystal and molecular structure of a tris(thiobenzoyldiazene)molybdenum complex: an example of distorted trigonal-prismatic coordinationJonathan R. Dilworth, J. Hyde, P. Lyford, P. Vella, K. Venkatasubramaman, and Jon A. ZubietaCite this: Inorg. Chem. 1979, 1…
Article A Thermodynamic Analysis of the Stress-Induced Martensitic Transformation in a Single Crystal was published on February 1, 1979 in the journal International Journal of Materials Research (volume 70, issue 2).
Abstract Metal-rich ternary chalcogenides M 3 M 2 ′X 2 (M = Ni, Co, Pd, Rh; M′ = In, Tl, Pb, Sn; X = S, Se) with Shandite-type structure were synthesized from mixtures of the elements and/or binary components. A single-crystal investigation on Co 3 ln 2 S 2 verifies the rhombohedral unit cell of Shandite-type compound…
Abstract Infrared and Mössbauer spectroscopy show that the extent of the reduction of nontronite is dependent on the chemical composition of the nontronite and on the nature of the reducing agent. Hydrazine reversibly reduces about 10% of the iron in all of the nontronites studied irrespective of composition and it is…
Abstract Quenched amorphous films of poly(ethylene terephthalate) (PET) are stretched at temperatures less than T g ; changes in density, wide‐angle x‐ray diffraction, and small‐angle light scattering are observed. The density increase upon stretching is attributed to an increase in crystallinity accompanied by an inc…
A beta titanium alloy was evaluated for use in orthodontic appliances. Standard mechanical tests and aspecially designed spring test were used. Two particular thermo-mechanical treatments resulted in titanium springs with 1.8 times the extension of comparable stainless steel springs, and a 2.2 fold reduction in force…
Electrical conductivity specimens of and were prepared by a cast ceramic tape technique and by the more conventional method of isostatically pressing and sintering. The electrical conductivity of these specimens was measured in oxygen between 400°–1000°C. In this region the conduction is essentially ionic, and the tem…
The outstanding electrical and arc-quenching characteristics of sulphur-hexafluoride (SF6) have already set new trends and standards for the construction of high voltage equipment. Intensive research is being carried out on the electrical properties of SF6, other electronegative gases and their mixtures with more comm…
We have carried out a high-resolution x-ray study of the mass-density fluctuations and a light-scattering study of the bend-mode-director fluctuations associated with the nematic-smectic-$A$ phase transition in 4-cyano-4\ensuremath{'}-octylbiphenyl (8CB). This phase transition is found to be nearly second order with a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign and evaluation of a new low-pressure impactor. 2Susanne V. Hering, Sheldon K. Friedlander, John J. Collins, and L. Willard RichardsCite this: Environ. Sci. Technol. 1979, 13, 2, 184–188Publication Date (Print):February 1, 1979Publication History Published online1 May…
An attempt is made to unify current knowledge of the optical, vibrational, transport and defect-related properties of amorphous As in terms of its structure and the nature of the bonding. The importance of remnant mesomeric bonding, particularly in determining preparation-dependent variations in the optical gap, is st…
General lattice vibrational properties of minerals, particularly those properties which strongly influence the thermodynamic behavior, are discussed in this paper (the second of a series relating thermodynamic and lattice vibrational properties of minerals). Infrared (IR), Raman (R), and inelastic neutron scattering (…
The results of an electron spin resonance (ESR) study of trans-polyacetylene, before and after doping with AsF5, are reported. The undoped polymer exhibits a Lorentzian line (g=2.00263) indicative of motional narrowing from a mobile unpaired electron species. Measurement of the intensity indicates a Curie law suscepti…
In the light of recent experimental studies on ion implantation in beryllium metal, some of the properties and interactions of implanted lithium, magnesium and zinc have been calculated using effective ion-ion potentials constructed by pseudopotential methods. It is shown that there is a strikingly small interaction e…
Molecular dynamics calculations have been performed on polymeric systems containing a single chain immersed in a solvent. All atoms interact via the repulsive (shifted) Lennard-Jones potential. In addition, nearest neighbors along chains are linked by a quasiharmonic potential which permits limited pair extensions. Ch…
Measurements of lattice parameters and birefringence of PbTiO3 single crystals are described as a function of temperature. The anomalous rise in birefringence with temperature is interpreted in terms of lattice strain and dielectric polarization.