Materials Literature
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In order to get an optimum performance of composite materials, it is of crucial importance to select the best curing process, on condition that resin and curing agent system is determined. In this paper, we studied the curing non-isothermal dynamics of the nmSi02 / epoxy resin system, and calculated the activation ene…
Copolymerization of 1-vinyl-1,2,4-triazole with crotonic aldehyde under the conditions of free-radical initiation has been studied. 1-Vinyl-1,2,4-triazole was found to be more reactive than crotonic aldehyde. The composition and structure of copolymers were determined by the elemental analysis, IR and quantitative 13…
Molecular dynamics simulations have been used to investigate the structural behavior of nanorods with square cross section. The nanorods consist of pure Ag and Cu phases or of three Ag and Cu domains in the sequence Ag–Cu–Ag or Cu–Ag–Cu. Ag and Cu domains are separated by coherent interfaces. Depending on the side len…
Abstract The iron-matrix WC wearable composite reinforced with Tungsten Carbide (WC) particles was prepared by the method of flux-cored wire TIG welding. The microstructure and component of the hardfacing layer were investigated. The results indicate that the WC particles have been dissolved, but their shapes were not…
Precursor of BiOCl was synthesized using BiCl3 and NaOH. Bi2O3 whiskers with high aspect ratio were prepared through reversing-titration method, i.e., dispersing BiOCl in Na2SO4, then dropped it in NaOH solution. The formation of monoclinic α-Bi2O3 crystal whiskers was characterized by X-ray diffraction (XRD), Scannin…
In this paper, Ba1−xSrxTiO3 (0 ≤ x < 1) crystals with different morphologies have been selectively synthesized via a facile hydrothermal route without any surfactants or templates. The as-prepared products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray sp…
A theoretical approach was used to study the atomic arrangements of boron carbonitride nanotubes with diameters from 4 to 16 The role played by nitrogen and boron doping in the structural stabilization of these molecular systems was evaluated, and the geometry of carbon and boron carbonitride nanotubes was investigate…
Carbon nanomaterials have become increasingly important for many applications, including sensors, electronics, biomedical materials and functional composites. Currently their production is based on hydrocarbons or graphite and requires very high temperatures. Here we present a method for the synthesis of carbon nanoma…
We have fabricated surface‐modified paclitaxel nanowires (SM‐PNs) with a precise diameter and an average length of 50 μm. The surface of these nanowires is coated with a monolayer of octadecylsiloxane (ODS), which prevents aggregation and enhances dispersivity in aqueous media. This system constitutes a novel drug del…
Mechanically complementary clamp configuration is a recent concept in piezoworm motor technology where both clamping sections can be driven simultaneously by same signal which reduces the actuation steps and drive electronics. Despite their opposite functionality, both normally clamp (NC) and normally unclamp (NU) cla…
We investigated the effects of the rotational speed in the spin coating process for growing the BZT thin film. In this process, the rotational speed is taken to be 2000 rpm, 3000 rpm and 4000 rpm while the number of layer is kept constant in five layers. We also discuss the effect of the layers number in the growing o…
A reverse mode liquid crystal (LC) display has been investigated. A driving voltage strongly depends on a morphology which changes by reactive mesogens, photo initiators and LCs. It becomes higher when the domain size of the liquid crystal and the particle of the polymer reactive mesogen are smaller.
In this paper, the formation of stable and continuous inorganic coating on indium tin oxide (ITO) via biosilica polymerization in the presence and absence of externally imposed electrostatic fields is described. The electrostatic fields exert a stronger influence on poly-L-lysines (PLLs) with a lower molecular weight…
When heavily doped, semiconductors such as ZnO can exhibit metallic properties thus becoming versatile building blocks for optical metamaterials. Here, we design and fabricate an all-semiconductor metamaterial and demonstrate negative refraction in the near-infrared region.
The fundamental test case of gas flow between two concentric rotating cylinders is considered in order to investigate rarefaction effects associated with the Knudsen layers over curved surfaces. We carry out direct simulation Monte Carlo simulations covering a wide range of Knudsen numbers and accommodation coefficien…
Abstract The effect of applied pressure on microstructures and properties of an in-situ formed Mg2Si/Al-Si-Cu reinforced metal matrix composite fabricated by squeeze casting are investigated. Due to the wide solidification range and the high viscosity, this type of composites is prone ro shrinkage and gas porosity. In…
Intramolecular and/or intermolecular hydrogen-bonded maleate (HMA−) monoanions were introduced into cation radical salts of tetrathiafulvalene (TTF), forming three kinds of crystals: (TTF+)(H2MA)(HMA−) (1), (TTF+)3(HMA−)3(CH3OH)(H2O)0.5 (2), and (TTF+)3(TTF0)5(HMA−)3 (3). In crystals 1 and 2, the monovalent TTF+ catio…
The paper deals with tests of surface layer properties of copper alloy casts based on the example of MO59 alloy. The main purpose of the paper is presenting hardness distributions of the analysed samples and determining the optimal technological allowance. Based on the results of the hardness distributions tests recom…
We have fabricated dye-doped doubly periodic layered structures exhibiting multiple bandgaps in the visible range in dichromate gelatin emulsions by a double-exposure holographic interference method. More importantly, optically pumped lasing with higher efficiency and lower threshold compared to that of singly periodi…
Highly-ordered titanium dioxide nanotubes array was prepared in fluoride based electrolyte and was subsequently deposited with silver nanoparticles and decorated by silver dendritic structures in silver ions-rich ethanolic electrolyte through conventional two-electrode configuration electrochemical method. The nanopar…