Materials Literature
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Crystal plasticity is the result of the motion and interaction of dislocations. There is, however, still a major gap between microscopic and mesoscopic simulations and continuum crystal plasticity models. Only recently a higher dimensional dislocation density tensor was defined which overcomes some drawbacks of earlie…
Diverse one-dimensional （1D） nanostructures of ZnO, such as tower-like, conical, mushroom-like and ring-like， have been synthesized through vapor phase deposition method using metals and semiconductors as the substrates. SEM and TEM are used to characterize the morphologies and microstructures of as-synthesized produc…
Carbon steel is considered in Japan the candidate material for overpacks in high-level radioactive waste disposal. Effects of bicarbonate solutions on the corrosion behavior and corrosion products of carbon steel were investigated by electrochemical measurements, FT-IR and XRD analyses. The anodic polarization measure…
The plant Pergularia daemia has been traditionally used as anthelmintic, laxative, antipyretic expectorant and also used to treat infantile diarrhea and malarial intermittent fevers. It is widely distributed in the tropical and sub tropical regions of the world. Various phytochemical including terpenoid, flavonoids, s…
The Bell–Lavis model for liquid water is investigated through numerical simulations. The lattice-gas model on a triangular lattice presents orientational states and is known to present a highly bonded low density phase and a loosely bonded high density phase. We show that the model liquid-liquid transition is continuo…
Soluble precursors of β-, meso-unsubstituted mono-, di-and tribenzoporphyrins were prepared by the reaction of dimethylbicyclo[2.2.2]octadiene-fused pyrrole with appropriate β-free pyrroles.The retro Diels-Alder reaction of these precursors afforded the corresponding benzoporphyrins in quantitative yields.
It is well known that the usual procedure for quantification by electron spectroscopy that is based on measured peak intensities is highly unreliable. An improved method is to take into account that the peak shape in a wide energy range, on the low kinetic energy side of the peak varies considerably with the surface m…
Fatty acids have been used previously in the development of polymers for biomedical applications as they are considered to be inert, inexpensive and biocompatible, as well as possessing low toxicity. This review focuses on use of different fatty acids for synthesis of injectable polymers for intended use as drug carri…
Power ultrasonic reactors have gained a lot of interest in the food industry given the effects that can arise from sound induced cavitation. However, most of the new food processing developments have been based on empirical approaches. Thus, there is a need for mathematical models which help to understand, optimise an…
A C(6)-symmetric disk-like molecule, a hexakis(phenylethynyl)benzene derivative bearing chiral alanine parts, L-1, exhibited a solvent-induced supramolecular helix-sense inversion involving conformational changes followed by destruction of the supramolecular helical column. This phenomenon has been found by investigat…
We systematically studied the structural, energetic and electronic properties of zigzag boron nitride nanotubes (BNNTs) functionalized by a class of substituted carbenes (CR(2)) where R = H, F, Cl, CH(3), CN and NO(2) on different absorption sites using density functional theory. For R = H, F and Cl, the open structur…
Direct exposure of carbon nanotubes (CNTs) to xenon excimer ultraviolet (EUV) irradiation under ambient conditions produces abundant carboxylic groups bound to lattices. Tube wettability is therefore improved and dominated by polar components arising from hydrogen bonds and dipole–dipole interactions.
Supramolecular aggregates can be aligned in solution using a magnetic field. Because of the optical anisotropy of the molecular building blocks, the alignment results in an anisotropic refractive index of the solution parallel and perpendicular to the magnetic field. We present a model for calculating the magnetic bir…
[2.n]Thiophenophan-1-ene derivatives containing a polyether bridge have been synthesized by the coupling reaction of bis(iodomethyl)dithienylethene with polyethylene glycols under high dilution conditions. All prepared [2.n]thiophenophan-1-enes were photochromic, as photocyclization of the open forms took place by UV…
We demonstrate the formation of water dispersed nanorod assemblies by phase transfer of semiconductor (CdS, CdSe, CdTe) nanorods from the organic to the aqueous using pluronic triblock copolymers. On phase transfer, the randomly dispersed nanorods in the organic medium close pack in the form of discs encapsulated in t…
The influence of cooling rate on the composition, structure and magnetic behaviour of NaxCoO2 (x ∼ 0.65) is reported. Slow cooled and quenched samples are shown to have different compositions: x = 0.63 and x = 0.68, respectively. On slow cooling, exsolution of sodium occurs and appears as a separate phase, Na2CO3. Whe…
The electromechanical actuation of macroscopic carbon nanotube (CNT) structures, including single and multi walled CNT mats and aligned ribbons, is analyzed and compared. From experimental evidence, actuation due to quantum chemical and electrostatic effects can be distinguished. Their respective contribution to the t…
We investigate the critical current density for electromigration failure, jc, as a function of voiding failure mode for Cu dual damascene vias. We demonstrate experimentally the variation of (jL) product with via failure mode showing that it is not possible to characterize vias by a single (jL). We suggest that, in ge…
It is absolutely necessary to reduce plant investments and processing costs in order to make natural fibres more attractive for farmers and industry. Conventional hemp fibre production is based on field drying and straw retting – connected with a high weather risk. Therefore, a novel weather-independent technique has…
16 five-ring ester-type Br-substituted banana-shaped molecules were synthesized in a combinatorial manner using palladium-catalyzed carbonylative esterification on a polymer-support and their mesophase behavior was investigated.