Materials Literature
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The relationship between blistering, H content and de-passivation of the dangling bonds has been studied in annealed hydrogenated a-Si/a-Ge superlattice (SL) nanostructures grown by RF sputtering. Measurements have been carried out by ERDA, IR absorbance and AFM. By comparison with parallel investigations on a-Si and…
Indentation tests were performed on samples of 6061 aluminium alloy in the annealed, T4 and T6 temper conditions. The tests were performed over a range of loading rates to study the effect of indentation strain rate [Formula: see text] on the indentation depth dependence of the average indentation stress σind. While […
We review our comprehensive investigation of light self-localization phenomena in planarly configured azobenzene liquid crystals. Cis-trans isomerization of azobenzene molecules and related changes in the order parameter of the liquid crystals support a high nonlinear response and the formation of optical spatial soli…
Gelatins with differences in biological origin (bovine, porcine, fish and poultry) and Bloom strength (from 100 to 270 °Bloom) were studied to investigate their characteristics in accordance with their intrinsic properties. Statistical differences were found in most of the parameters evaluated (°Bloom, intrinsic visco…
CdTe film was deposited using the electrophoretic deposition technique onto an ITO glass at various bath temperatures. Four batch film compositions were used by mixing 1 to 4 wt% concentration of CdTe powder with 10 mL of a solution of methanol and toluene. X-ray Diffraction analysis showed that the films exhibited po…
Structural and electronic properties of silver hydride cluster anions (Ag(n)H(-); n = 1-3) have been explored by combining the negative ion photoelectron imaging spectroscopy and theoretical calculations. The photoelectron spectrum of AgH(-) exhibits transitions from AgH(- 2)Σ(+) to AgH (1)Σ(+) and AgH (3)Σ(+), with t…
Crystals of the title compounds were grown from their hydrous melts or solutions. The crystal structure of iron(III) trinitrate hexahydrate {hexaaquairon(III) trinitrate, [Fe(H(2)O)(6)](NO(3))(3)} is built up from [Fe(H(2)O)(6)](2+) octahedra and nitrate anions connected via hydrogen bonds. In iron(III) trinitrate pen…
A series of novel star-shaped poly(ϵ-caprolactone) (PCL) biodegradable polyesters were synthesized through ring-opening polymerization of ϵ-caprolactone in the presence of a poly(amidoamine) (PAMAM) dendrimer initiator. The polymers (PAMAM/PCLs) were obtained with a high yield (92%) and a number-average molecular weig…
Abstract PEEK/PEI/PES plastics alloys in weight ratios of 70/30/0, 70/25/5, 65/30/5, 60/30/10, 60/35/5, and the three kinds of single high performance engineering plastics 100/0/0, 0/100/0, 0/0/100 were prepared by twin‐screw extrusion molding. A single glass‐transition temperature (Tg) of each alloy in the former fiv…
The spectral map of the nonlinear absorption coefficient of glass-copper nanocomposite in the pump-probe scheme constructed with the use of a simple anharmonic oscillator model reproduced well the spectral map obtained in the experiment. It is shown that spectral features in nonlinear response of glass-metal nanocompo…
High water content hydrogel microparticles based on the cross-linking of albumin with activated poly(ethylene glycol) were synthesized. The influence of different synthesis parameters on the physicochemical characteristics of the microparticles, such as the type of oil and of albumin, and the molecular weight of PEG,…
A strain-balanced InGaAs/GaAsP superlattice (SL) was inserted in the intrinsic region of a p–i–n GaAs to adjust the performance of a photovoltaic device. The SL cell exhibited an excellent enhancement in short-circuit current ( I sc ) of 3.0 mA/cm 2 , while maintaining a minimum drop of open-circuit voltage ( V oc ) o…
Novel well-defined hydrophilic cationic polymers with different length of polycation chain for gene delivery, poly(vinyl pyrrolidone)-graft-poly(2-dimethylaminoethyl methacrylate)s (PPDs), were synthesized by atom transfer radical polymerization (ATRP). The chemical structures and compositions of these polymers were c…
The purpose of this study was to compare the results of delivering low doses of growth factor iteratively (20 μg x5) via a reservoir system with results obtained following a single administration of 100 μg of growth factor. The delivery systems using gelatin microspheres (GMS) facilitate the controlled release of drug…
In this study, hydrogels composed of polyethyleneimine (PEI) and poly(vinyl pyrrolidone) K90 (PVP) cross-linked with various concentrations (0, 0.125, 0.25 and 0.5%) of glutaraldehyde were evaluated as a hydrogel filler for the local delivery of lidocaine after tooth extraction. The drug-release kinetics, swellability…
The manufacture of mechanical devices such as microelectromechanical systems from thin films can lead to circumstances where the scale of the mechanical deformation induced by device operation is comparable with the scale of the microstructure of the materials from which they are made. A similar observation occurs whe…
Microstructure refinement of ternary eutectic Fe 40 Ni 40 B 20 alloy in undercooling and rapid cooling solidification has been studied. In natural cooling conditions, two kinds of microstructure refinement take place with increasing undercooling. For melts with the same undercooling, the as solidified microstructure r…
Deamidation of asparagine is the spontaneous degradation of this residue into aspartic acid. The kinetics of this slow reaction is mainly dependent on the nature of the adjacent amino acid that follows asparagine in a peptide or protein primary sequence. In the homodimer triosephosphate isomerase (TPI), there are two…
A three-dimensional numerical model was used to simulate the gas–char two phase flow and combustion characteristics in the raceway of a COREX melter/gasifier. The flow was depicted using Euler–Lagrangian models, and a kinetic/diffusion limited rate model was used to simulate char oxidation and the gasification reactio…
In this work, integral equation theory is extended to describe the structures and surface tensions of confined fluids. To improve the accuracy of the equation, a bridge function based on the fundamental measure theory is introduced. The density profiles of the confined Lennard-Jones fluids and water are calculated, wh…