Materials Literature
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Poly(N-vinyl-2-pyrrolidone)-stabilized Pd-nanoclusters, for the first time exclusively supported on the hydrotalcite lateral surface, showed a remarkable catalytic performance in the selective hydrogenation of 3-hexyn-1-ol, which can be ascribed to both the influence of the protecting polymer PVP as well as the nature…
The electrochromic polymer poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) spin-coated on ITO/glass was patterned with a soft lithographic method in order to diffract the incident light and thereby modify absorption of light by the film to improve the electrochromic efficiency of the polymer. The…
The Pnma-Imma-I4/mcm phase transitions of SrZrO3 have been successfully observed by measuring the variation of energies of phonon modes as a function of temperature. The squares of phonon mode frequencies, ω02, exhibit a linear relation with temperature, T, on both sides of the phase transitions. An unusual value of -…
We report on observations of transient behavior of currents induced by the polarity reversal of a dc voltage applied across a nematic liquid-crystal cell. The curve of the time-evolved transient current reveals two peaks for the external voltage larger than a characteristic value. The temperature dependence of drift m…
Hydrogen gas storage ability in carbon and boron nitride (BN) clusters was investigated by molecular orbital calculations. From single point energy calculations, H2 molecules would enter from hexagonal rings of C60 and B36N36 clusters and octagonal rings of B24N24 cluster because of lower energy barrier. Chemisorption…
The title compound is a charge transfer complex with an experimental low lying excitation located around 420 nm. It is used as a model compound for the investigation of a possible strategy towards NLO materials obtained by “through space” charge transfer. Its solid state structure (Pc space group) reveals non-centrosy…
The deformation of metal plates and tubes achievable through the use of liquid shock waves generated in a shock tube is studied, with reference to both free-forming and forming the metal into dies, as well as to imprinting detailed features. The process is highly controllable, in terms of the magnitude and duration of…
Oxyfluoride glasses were developed with composition 30SiO2·15AlO1.5·28PbF2·22CdF2·(4.9 – x)GdF3·0.1HoF3·x YbF3 (x ¼ 0; 0.1, 0.2, 0.5, 1, 2, 3, and 4) in mol%. Powder X-ray diffraction analysis revealed that the heat-treatments of the oxyfluoride glasses at the first crystallization temperature cause the precipitation…
The aim of this work is the transient analysis of hybrid systems based on high-temperature Solid Oxide Fuel Cells (SOFC). The cell models were presented and discussed in Part A of this work. In this part attention is focused on the anode recirculation system. In a SOFC hybrid system it is necessary to recirculate part…
The syntheses of a number of azo and azine dyes with various surface attachment groups is described. The dyes use different methods of achieving surface complexing and are evaluated for their suitability as multiple labels for SERRS. The surface complexing agents, 8-hydroxyquinoline, benzotriazole, and pyridine are bo…
Pembaruan utama pada edisi keenam dari buku klasik ini adalah pada fokus pembahasannya yang lebih menekankan pada kesamaan di dalam bidang material yang beragam jenisnya ini. Ini terlihat dari pembahasan mengenai struktur dan sifat material, yang berlaku umum untuk semua jenis material, dan bukan dibagi berdasarkan ke…
Several new enaminoketone mesogens were synthesized and coordinated to various metal salts to yield a variety of novel rodlike metal-containing liquid crystals. The mesophases were characterized by polarized optical microscopy (POM), differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS). Wher…
The corrosion behavior of a dense material (hot pressed with 2.5 wt % as a sintering aid) in aqueous acid solutions containing different aggressive anions such as chlorides, perchlorates, sulfates, oxalates, and fluorides was investigated by means of several experimental techniques. The methodology adopted consists in…
Formation of flat gold nanostructures occurs by the reduction of a Langmuir monolayer of hydrophobized chloroaurate ions using anthranilic acid as a reducing agent present in the subphase. Vigorous shaking of the aqueous chloroauric acid solution with a solution of surfactant, such as octadecylamine (ODA) or benzyldim…
Simultaneous small‐angle x‐ray scattering (SAXS) and force measurements have been recorded during tensile load/unload deformation cycles of two contrasting polyurethane elastomers. The elastomers comprise the same hard and soft chemical segments; in sample A, the length of the hard blocks is randomized, while, in samp…
The objective of this study was to determine if a distribution of pit induction times (from potentiostatic experiments) could be used to predict a distribution of pitting potentials (from potentiodynamic experiments) for high-purity aluminum. Pit induction times were measured for 99.99 Al in 50 mM NaCl at potentials o…
The multichannel C + allene, methylacetylene, propylene and trans-butene reactions were studied, at room temperature, in a low-pressure fast-flow reactor. Carbon atoms were obtained from the reaction of CBr4 with potassium atoms. The overall rate constants were found to be (2.7 ± 0.5) × 10−10, (2.9 ± 0.4) × 10−10, (2.…
Two Spodosols with significant spodic morphological characteristics and clay accumulation were selected from a subalpine forest region where the elevation ranges from 2400 to 2700 meters, with high precipitation and low temperatures, and cool and humid weather conditions prevail. The objectives of this study were to i…
The effects of heat-treatment (before and after anodization) on the microstructure and electrochemical characteristics of anodized aluminum oxide films formed in 85°C aqueous ammonium adipate electrolyte were investigated. The morphology and crystal structure of the anodized oxide were examined by transmission electro…
The conditions that induce the phase separation and the bubble nucleation for the thermoplastic foam extrusion process in which physical foaming agents (PFA) are involved are obviously linked to the solubility parameters: temperature, PFA content, and pressure. However, it has been reported that flow or shear can sign…