Materials Literature
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The effect of Zr content on the microstructure and magnetic properties of Sm(CobalFe0.1Cu0.088Zrx)8.5 magnets with x varying from 0 to 0.1 was systematically studied using magnetic, x-ray diffraction, and transmission electron microscopy measurements. The results have revealed that addition of Zr greatly affects the m…
Abstract Dendrimers are macromolecular, nanoscale objects that are widely recognized as precise, mathematically defined, covalent core-shell assemblies. As such, they are composed of quantized numbers of atoms, monomers, and terminal functional groups relative to the respective shell levels (generations) surrounding t…
Electrochemical properties of polypyrrole films grown in acetonitrile solutions at gold electrodes modified with thiolated β‐cyclodextrin (β-CD) self‐assembled monolayers (SAMs) have been investigated using cyclic voltammetry, electrochemical impedance spectroscopic measurements, and scanning electron microscopy. The…
Oil palm empty fruit bunch–polypropylene (EFB-PP) composites have been produced using a twin-screw extruder as the compounding equipment. Two levels of EFB were employed, 40 % and 60 % of the total weight of the sample. Three types of coupling agent, maleic anhydride-modified polypropylene (commercial name Epolene E-4…
The reaction of organolithium reagents with 5,15-disubstituted porphyrins, followed by hydrolysis of the intermediate anion to give a porphodimethene and oxidation with DDQ allows the facile preparation of 5,10,15-tri- and 5,10,15,20-tetrasubstituted porphyrins with mixed meso substituent types. Easily available 5,15-…
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Fibrous collagen networks are the major elements that provide mechanical integrity to tissues; they are composed of fiber forming collagens in combination with proteoglycans and elastic fibers. Using uniaxial incremental tensile stress–strain tests we have studied the viscoelastic mechanical properties of self-assembl…
Abstract It has been found that the bimetallic nanoclusters often have so-called core/shell structure if they are prepared by alcohol-reduction of two kinds of noble metal ions in the presence of a water-soluble polymer like poly(N-vinyl-2-pyrolidone)(PVP), and that the core/ shell structured bimetallic nanoclusters h…
C-S-H samples were precipitated from aqueous solution containing Ca(NO 3 ) 2 and Na 2 SiO 3 with an initial Ca/Si molar ratio of 1·3, when the pH value in the solution was varied by adding HNO 3 or NaOH. A pH > 10·9 was required to obtain quasi-crystalline C-S-H, and the CaO/SiO 2 ratio of the precipitate was incre…
Conventional 'one by one' synthesis approach has been a major rate limiting step in the systematic exploration of increasingly complex materials for the demanding new technologies. New concepts of 'combinatorial chemistry' are presented for the substantially efficient and cost-effective parallel synthesis and optimiza…
The activity and stability of bifunctional air electrodes for electrically rechargeable metal air batteries were investigated using ac impedance spectroscopy. The poly(tetrafluoroethylene) bonded electrodes consisted of a perovskite‐type catalyst dispersed on high surface area carbon (Ketjen black) or on graphitized c…
Electrochemical Characterization of the Nanoporous Honeycomb Diamond Electrode as an Electrical Double‐Layer Capacitor, Honda, K., Rao, Tata N., Tryk, D. A., Fujishima, A., Watanabe, M., Yasui, K., Masuda, H.
Blue shifts of the ultraviolet absorption edge due to the direct-type charge-transfer transition between O 2p and Ce 4f bands are observed in monodisperse CeO2−x nanoparticles, which are produced as toluene sols by a successive micro-emulsification method. The blue shift is closely proportional to the difference in th…
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…