Materials Literature
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A new direct imaging photoelectron microscope has been demonstrated at the Stanford Synchrotron Radiation Laboratory. Data are obtained in the form of spectrally resolved images with a lateral resolution of <5 μ. The microscope produces a series of projected images with 64×64 picture elements. These images are…
This paper describes the use of electrically conducting polyanilines as discharge layers for electron-beam (e-beam) lithography. The emeraldine oxidation state polyaniline is a soluble material which can be doped by various cationic reagents, most commonly protonic acids, to afford conductivity on the order of 10° Ω−1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFTIR studies of polyimides: thermal curingR. W. Snyder, B. Thomson, B. Bartges, D. Czerniawski, and P. C. PainterCite this: Macromolecules 1989, 22, 11, 4166–4172Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 Novemb…
Focusing on all aspects of composites, this book covers the composition, structure, and physical properties of composites. You'll study the manufacturing methods of fiber reinforced plastics and post fabrication techniques, as well as the latest composites applications. Topics include: thermosets, thermoplastics, non-…
In this final paper of a sequence of five papers presenting details of a thermodynamic phenomenology for the whole PbZrO3 : PbTiO3 solid solution family, the constants derived in the earlier papers are used to calculate the temperature and composition dependence of the Elastic Gibbs Free Energy ΔG 1 at zero stress, th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdvanced oxidation processes. Description of a kinetic model for the oxidation of hazardous materials in aqueous media with ozone and hydrogen peroxide in a semibatch reactorWilliam H. Glaze and Joon Wun KangCite this: Ind. Eng. Chem. Res. 1989, 28, 11, 1573–1580Publication…
Vaiues of the Curie constant (C) and sixth-order polarization interaction dielectric stiffness coefficients (α112 and α123) are needed for the development of a thermodynamic theory for the entire lead zirconate-titanate (PZT) solid solution system. Low-temperature dielectric data measured on pure homogeneous polycryst…
A formally exact, nonlinear generalized Langevin equation (GLE) for a flexible probe polymer in a dense melt has been derived using molecular phase space kinetic theory and Mori–Zwanzig projection operator techniques. An approximate, linearized dynamic memory function is developed, and the resulting GLE is specialized…
The effects of vesicle size, lipid composition, and drug-to-lipid ratio on the biological activity of liposomal doxorubicin in mice have been investigated using a versatile procedure for encapsulating doxorubicin inside liposomes. In this procedure, vesicles exhibiting transmembrane pH gradients (acidic inside) were e…
High thermal conductivity, low dielectric constant, high electrical resistivity, low density, and a thermal expansion coefficient that matches well with that of silicon are the principal attributes of AIN that have attracted much attention over the past decade. It is also now well established that oxygen as an impurit…
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A simultaneous examination of data on the dynamic, kinematic, and rotational viscosities of nematic liquid crystals (NLC) belonging to 320 chemical classes has been carried out for the first time. The methods for the measurement of the viscosities of the NLC have been subjected to a comparative analysis and the limits…
In order to broaden the available materials for superlattices and quantum well structures, well-passivated polycrystalline semiconductors and amorphous oxides such as pc-Si/a-SiO2, pc-Ge/a-GeO2 (pc: polycrystalline; a: amorphous) are proposed. Crucial in maintaining long scattering length involves the passivation of p…
The specific heat C p (1-330 K) and magnetic susceptibility χ (5-250 K) of a CuO sample sintered and annealed in oxygen are presented. In contrast with some earlier results, we find: (i) an essentially zero linear term in the low-temperature specific heat (γ* < 0.05 mJ mol -1 K -1 ); (ii) a minor change in slope in th…
Spin-density functional theory is applied to describe non-collinear itinerant magnetism. For this the theory is formulated and a new implementation is given. It serves to perform self-consistent energy-band calculations for the compound Mn 3 Sn which possesses a triangular magnetic structure. Our results are discussed…
A model for subcritical parity-breaking bifurcation of a periodic pattern is introduced. It is found that nucleated regions of the new asymmetric state propagate with a well-defined velocity in a direction determined by their parity, and leave in their wake a pattern with an altered wavelength. Successive passage of t…
We report a study of a fingering instability which occurs during the spreading of a spinning drop. We measure the time evolution of the drop profile, the critical radius for instability onset, and the fastest growing instability wavelength. The experimental results are compatible with the predictions of lubrication th…
We report a Hall effect and magnetoresistance study of sin- gle crystals of the organic superconductor tetramethyl-tetraselenafulvalinium hexafluorophosphate, (TMTSF${)}_{2}$${\mathrm{PF}}_{6}$, under hydrostatic pressure at temperatures down to 0.5 K in magnetic fields up to 25 T. There is clear evidence for a quanti…
An atomic model of 43,692 non-hydrogen atoms has been determined for the 12-subunit enzyme glutamine synthetase from Salmonella typhimurium, by methods of x-ray diffraction including restrained least-squares atomic refinement against 65,223 unique reflections. At 3.5 A resolution the crystallographic R-factor (on 2 si…
The temperature dependence of the electrical properties of the semiconducting amorphous copper-tellurite glasses is presented in a range of compositions. A polaronic model is shown to be generally applicable, and the variation of activation energy with the glass composition is found to dominate the conductivity. In pa…