Materials Literature
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A thermally stable mesoporous TiO2 with a crystalline framework and ordered large pores is synthesized using a block copolymer as a structure-directing agent through an N0I0 assembly pathway, followed by a hydrothermal process.
Indium–zinc oxide thin films, with compositions ranging from In2O3 to ZnO, were prepared by pulsed laser deposition using a substrate temperature of 500 °C and an oxygen pressure of 10−3 mbar. X-Ray diffraction studies coupled with transmission electron microscopy revealed that the texture and the structure of the fil…
Lifetime predictions of containers used for the disposal of high-level radioactive waste (HLW) are necessary to determine the overall performance of a HLW repository. Failure of the containers by localized corrosion and release of radionuclides into the accessible environment may occur if chloride-containing groundwat…
### History and applications The earliest description of a change in mineral property caused by radiation-damage was by Jons Jacob Berzelius in 1814. Berzelius, a Swedish physician and mineral chemist, was certainly one of the most eminent scientists of his century, discovering the elements cerium, selenium and thoriu…
Punching electrical steels drastically alters their magnetic properties near the cutting edges, which should be accounted for when designing machines. A simple magneto-mechanical coupled finite element analysis, suitable for fully processed grades, is proposed in order to model the consequences of this local degradati…
Research Article| December 01, 2000 Conversion of diatoms to clays during early diagenesis in tropical, continental shelf muds Panagiotis Michalopoulos; Panagiotis Michalopoulos 1Marine Sciences Research Center, State University of New York, Stony Brook, New York 11794-5000, USA Search for other works by this author o…
Technological interest in the design of multifunctional microporous materials has stimulated recent research into the development of mild solventothermal techniques for the construction of lamellar and framework Main Group chalcogenidometalates. Reaction pathways from elemental or metal chalcogenide sources can be inf…
The cationic copolymerization of tung oil with the divinylbenzene comonomer initiated by boron trifluoride diethyl etherate produces promising plastics. The gel times are largely dependent on the relative composition and the reaction conditions and vary from a few seconds to 1 h. Controlled reactions producing homogen…
Bis{4-[2-(4-pyridyl)ethenyl]benzoato}-zinc(II ) and -cadmium(II) with 8-fold diamondoid network structures have been synthesized under hydro(solvo)thermal conditions and exhibit powder second harmonic generation efficiencies comparable to that of technologically important lithium niobate.
Gaseous N2 has been efficiently introduced in the hollow cavities of aligned CNx nanotubes (15–80 nm od) by pyrolysing a jet (spray) solution of Fe(C5H5)2 and PhCH2NH2 in an Ar atmosphere at 850 °C; the aligned material consist of large arrays (2.5 cm2) of CNx (x < 0.05) ‘bamboo-like’ nanotubes (<100 μm in length); hi…
Solid‐state electrochemical cells with dense oriented thin film electrodes of (LSCO) were prepared on (100) surfaces of single‐crystal disks of yttria‐stabilized zirconia (YSZ) by the pulsed laser deposition technique. Oxygen exchange at the electrodes was studied with alternating current impedance spectroscopy under…
The types of structures formed when two or more cations occupy the sodium sites in the NaCl unit cell in a non-random manner are reviewed with reference to the cation arrangement in layers of close-packed octahedra and the cation arrangement in the NaCl subcell. Factors influencing the stability of particular structur…
The effect of EDTA (ethylenediaminetetraacetic acid, added as ) on the electrochemical behavior of iron and on the semiconducting properties of passive films formed on this metal in borate buffer solution (pH 8.4) was studied. Electrochemical studies, including potentiodynamic and galvanostatic reduction experiments a…
Preface. Introduction: Systemic Chemistry. Molecular Assemblies. A Few Notions of Symmetry. Supramolecular Engineering: Symmetry Aspects. Symmetry and Physicochemical Properties: The Curie Principle. Interactions and Organization in Molecular Media. Molecular Semiconductors: Properties and Applications.Molecular Diele…
Results of high-speed electrical and optical diagnostics are used as a basis to discuss a new surface flashover model. Outgassing, caused by electron stimulated desorption, is found to play a crucial role in the temporal flashover development. Dielectric unipolar surface flashover under vacuum is experimentally charac…
Density functional theory (DFT) calculations have been used to predict the IR and Raman spectra for zinc phthalocyanine (ZnPc). There is very good agreement in the frequency data (RMS error of 10 cm−1 for IR and 12 cm−1 for Raman scattering, with half of the bands in both cases predicted to within 6 cm−1). The precisi…
The O 2 reduction reactions on Sr‐doped LaMnO 3 (LSM) electrodes in solid‐oxide fuel cells in the absence and presence of a chromia‐forming alloy metallic interconnect have been investigated. Similar to those in the absence of the chromia‐forming alloy, the O 2 reduction reactions on LSM electrodes in the presence of…
An experimental program has been carried out to measure the terminal solid solubility (TSS) of hydrogen in Zircaloy. Unirradiated electron beam (EB) welded Zircaloy-2, EB-welded Zircaloy-4, Zircaloy-2 pressure tube, cold-worked β-quenched Zircaloy-2 forging, oxygen-strengthened tungsten inert gas (TIG) welded Zircaloy…
The thermoelectric properties of the pure and doped half-Heusler compounds FeVSb and FeNbSb are reported. The electrical resistivities are between 0.2 and 20 mΩ cm at room temperature. Thermoelectric power measurements indicate that FeVSb is an n-type material with moderate Seebeck coefficients near −70 μV/K at 300 K.…
Several sea sources for chitin have been investigated, and the chitin content and crystallographic polymorph of the extracted chitin determined. Deacetylation of the chitin was carried out and the physicochemical characteristics of the resulting chitosan studied. The influence of the reaction parameters (reaction dura…