Materials Literature
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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…
The in situ polymerisation of acrylic acid using low temperature plasma treatment was carried out on polyester, polyamide and polypropylene fabrics with the aim of improving their dyeability with basic dyes. The overall colour strength obtained was significantly increased as a result of this treatment. However, while…
Using a thin-film composition spread technique, we have mapped the phase diagram of the Ni-Mn-Al ternary system in search of ferromagnetic shape-memory alloys (FMSA). A characterization technique that allows detection of martensitic transitions by visual inspection using micromachined cantilever arrays was combined wi…
Abstract A series of highly soluble [tetrakis(2,4‐dimethyl‐3‐pentyloxy)phthalocyaninato]metal complexes [MPc(OC 7 H 15 ) 4 ] (M = Zn, Pd, Co) were prepared by cyclic tetramerization of 3‐(2,4‐dimethyl‐3‐pentyloxy)phthalonitrile ( 2 ) in the presence of the corresponding metal salts and 1,8‐diazabicyclo[5.4.0]undec‐7‐e…
A fourth polymorph of the 4-chloro-1,2,3,5-dithiadiazolyl radical, ClCNSSN is reported. It crystallises as twisted cofacial dimers in the triclinic space group P-1 with four molecules in the asymmetric unit. Whilst the structure exhibits three-centre SSδ+⋯Nδ− motifs similar to those previously observed in the α, β and…
On the basis of IR spectroscopy studies it is concluded that the redox couples Co(2+)/Co(+) and Ni(2+)/Ni(+) operate in the selective catalytic reduction of nitrogen oxides with hydrocarbons over Co-ZSM-5 and Ni-ZSM-5.
In recent years, a series of multi-element doped graphite materials has been developed for PFC (plasma facing components) in China. Detailed investigation of the composition and full characterization of the microstructure of the doped graphite were carried out in the last several years and are now still in progress. T…
Boron nitride (BN) nanohorns were synthesized by an arc-melting method, and atomic structure models for BN nanohorns with tetragonal BN rings were proposed from high-resolution electron microscopy. Stability and electronic structures of the BN nanohorns were investigated by molecular orbital/mechanics calculations. Th…
A new method for the synthesis of pillared clays using supercritical carbon dioxide (scCO2) has been developed. This scheme consists of two steps: (1) the hydrophobitization of the clay interlayer space, using an organic ion exchange method with interlayer cations in aqueous solution, and (2) the intercalation of a me…
A low polarization dependent, high diffraction efficiency grating for wavelength demultiplexer is proposed, manufactured by standard crystallographic etching of Si surface. Light is incident and diffracted inside the wafer, which is covered with reflecting metal. Optimized groove form results in a flat spectral respon…
The preparation, structural characterization and magnetic properties of three solvent adducts of VOCl(2), trans-VOCl(2)(THF)(2)(H(2)O) (1), trans-VOCl(2)(H(2)O)(2).2Et(2)O (2) and cis-VOCl(2)(MeOH)(3) (3) are described. In these solids, hydrogen bonding among the inorganic complexes is the critical determinant of the…
In order to work out indispensable criteria for a promising process of innovation, a historical review is given for two paths of innovation, which the author was involved in as an chemist in electrical industry from the initial idea up to commercialization and application in the field of microelectronics and electroni…
The crystal structure of a new mixed-valence Cu(III)/Cu(I) compound containing the ligand pds2− (pds, pyrazine-2,3-diselenolate) shows a unique packing pattern with 2D layers formed by the coordination of the Cu(I) countercations to both the pyrazine N and Se atoms of the [CuIII(pds)2]− complex, with a distorted squar…