Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe electronic structure of barium gallium antimonide (Ba7Ga4Sb9): a compound seemingly probing the limits of the Zintl conceptPere Alemany, Santiago Alvarez, and Roald HoffmannCite this: Inorg. Chem. 1990, 29, 17, 3070–3073Publication Date (Print):August 1, 1990Publication…
The insulator‐to‐metal transition , doping, the mechanism of conductivity, solitons, and organic ferromagnets are among the topics covered in this overview of developments in conducting polymers. The materials are already in commercial use in, for example, batteries. Further possibilities are examined and the latest d…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. J. McGrory, W. H. Tuminello; Determining the molecular weight distribution from the stress rel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of nickel carbonyl clusters: chemical bonding and spectroscopy of [Ni5(CO)12]2-, [Ni6(CO)12]2-, and [Ni8C(CO)16]2- studied by the LCGTO-LDF methodGianfranco Pacchioni and Notker RoeschCite this: Inorg. Chem. 1990, 29, 16, 2901–2908Publication Date (Print…
Methodology for designing reliable ceramic components requires a precise evaluation and correlation of strengths in different stress states. The present paper compares the merits of the Weibull approach and the multiaxial elemental strength model on an experimental case involving mixed‐mode failure in the presence of…
The effect of root exudates on structural stability and the hypothesis that the growing roots of corn (Zea mays L.) can destabilize soil structure by chelating Fe and Al involved in mineral-metal-organic matter linkages were investigated. Exudates were removed from 14 C-labelled corn and bromegrass (Bromus inermis Ley…
Results are reported from a composition study of forty-one phosphate glasses that are derivatives of a commercially available Nd-doped laser glass. Systematic variations have been made in the quantities of alkali and alkaline earth components in the glass. Correlations are developed relating the compositionally-averag…
Abstract Copolymers of acrylic acid and butyl acrylate crosslinked with 4,4′‐bis(methacryloylamino)‐azobenzene were synthesized by radical copolymerization with different amounts of acrylic acid and crosslinker. They were characterized by equilibrium degree of swelling, modulus of elasticity in compression at pH 2 and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of the Fenske-Hall molecular orbital method to the calculation of boron-11 NMR chemical shifts. Antipodal substituent effects in deltahedral clustersThomas P. Fehlner, Paul T. Czech, and Richard F. FenskeCite this: Inorg. Chem. 1990, 29, 17, 3103–3109Publication…
The development of polyacetylenes, polythiophenes and polypyrroles , amongst other conducting polymers is traced from an industrial point of view by one of the pioneers in the field. The methods used for the production of the materials are described and present and future applications are assessed.
The in vitro degradation of glycine-DL-lactic acid copolymers was studied as a function of the composition. These polydepsipeptides were prepared by ring-opening copolymerization of 6-methyl-2,5-morpholinedione and DL-lactide. The degradation of discs of the copolymers was performed in a phosphate buffer at pH 7.4 and…
Abstract The surface charges and the zeta potential of a Na-montmorillonite (Na-mont) and two pillared montmorillonite (MP1 and MP2) samples with different aluminum contents were determined by Potentiometric titrations and electrophoretic measurements. At pH >9 the two pillared montmorillonite samples showed zeta p…
This study was part of an overall effort to explore the feasibility of using psycho physical methods to assess one component of sensorial comfort, moisture sensation in clothing, We have used a psychophysical approach to assess the relationship between moisture stimulus intensity and moisture sensation in subjects for…
Diamond particles 10–500 nm in diameter were produced by microwave-assisted combustion of acetylene in oxygen. Both premixed and diffusion flame configurations were investigated. A mixture of cubic and hexagonal polytypes of diamond were identified. Larger particle sizes were observed at lower reactor pressure and hig…
Abstract The photelectron spectra of five different liquid silanes were measured. Their C 1s spectra and measured compositions were all consistent with the theoretical formula of these compounds. Subsequently, E‐glass fibers were exposed to dilute aqueous solutions of these silanes, and their adsorption on the fiber s…
An interrupted field time-of-flight (IFTOF) technique that enables displacement-current-free measurement of the photocurrent in the conventional transient photoconductivity experiment is described and implemented. During the drift of the photoinjected charge carriers across the sample, the applied field is removed at…
Colloidal dispersions of polymer-protected Pd/Pt and Pd/Au bimetallic clusters were prepared by reduction of an alcoholic solution of PdCl2 and H2PtCl6 or HAuCl4 in the presence of poly(N-vinyl-2-pyrrolidone). The reduction can be carried out by refluxing in alcohol or by irradiation with visible light. The dispersion…
Experimental methods are presented for the determination of fracture initiation toughness of ceramics and ceramic composites in pure tension under quasi‐static and dynamic loading conditions over a range of temperature spanning 20° to 1300°C. Circumferentially notched and cyclic fatigue precracked rods of a variety of…
Small unilamellar liposomes that contain the lipophilic chelate DTPA-stearate (DTPASA) were used as carriers for the paramagnetic metal ions gadolinium, manganese, and iron. The iron liposomes were unstable in vitro and thus not studied further. The natural targeting properties of these liposomes to the reticuloendoth…
Residual strains and stresses were determined in hot‐pressed α‐Al 2 O 3 composites containing 29, 18, and 10 vol%β‐SiC whiskers using X‐ray diffraction. A 29 vol% SiC hot‐pressed specimen containing whiskers coated with a 5‐ to 10‐nm‐thick carbon film was also investigated. Strains were determined from the 511 and 333…