Materials Literature
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Structural and magnetic properties of NiCrxFe2-xO4(x = 0.7 and 0.9) spinel ferrites prepared by sol-gel route have been investigated using synchrotron X-ray powder diffraction (SXPD) and magnetization measurements. The gel products after annealing at 1000 °C for 2 h are found to crystallize in cubic phase. Rietveld re…
This paper presented the new results of ZnO nanorods synthesis on 128-XY LiNbO3 substrate by low-temperature methods. It was shown that the quality of ZnO nanorods could be enhanced by post-growth thermal processing. ZnO nanorods were coated by Pt layer for selective detection of hydrogen. Application of ZnO nanorods…
Abstract Design and fabrication methods of HAN cells with arbitrary LC pretilt angle value are described. Phase retardation △Φ values for the hybrid LC vs. the LC pretilt angles θ 0 (1) , θ 0 (2) on the opposite cell's substrates are calculated for arbitrary light incidence angle. LC director configuration is suggeste…
Core-shell upconverting nanostructures (CSUNs) improve upconversion efficiency by blocking midgap recombination. Consecutive 3-level systems absorb strongly but preserve long carrier lifetime in their final states. Germanium has a nearly-direct bandgap ideal for a CSUN core: strong optical absorption yet slow recombin…
The paper presents a generic design study for a 2500 square meter, 4-storey embassy building. It is designed to resist blast loads from an assumed Design Basis Threat (DBT) that is provided by the owner. The building structure consists of reinforced concrete columns, beams and slabs supported on pile foundations. The…
We have furthered the development of CdTe nanocrystals (NCs) to create bulk, sintered films for ink-based solar cells. Here, respectable efficiencies of >10% have been achieved in devices where CdTe tetrapods are spincoated from pyridine, treated with CdCl2and briefly annealed. We have inserted these NC-based CdTe lay…
Anti-icing and de-icing heaters layers are frequently used in covers of large radio frequency (RF) equipment, such as radar or communication antennas, to prevent ice accumulation or completely remove it avoiding possible structure damage or service disruption. Typically the de-icing structures are produced using a met…
Nd2Ti2SiO9 ceramics with low-firing temperature by BaCu (B2O5) addition were prepared by the conventional solid-state reaction route and the sintering behavior, phase purity, microstructure and microwave dielectric properties were investigated. The XRD analysis results show a single phase Nd2Ti2SiO9 is formed and no s…
The tensile and shear mechanical properties of nanotwinned copper with embedded defects have been investigated by using molecular dynamics simulations. Simulation results show that the stress concentration at the tips of crack-like defects dominates the first partial dislocation nucleation at the onset of plastic defo…
Extended Producer Responsibility Policy is an environmental policy firstly implemented in OECD countries. The policy enables the producers to extend responsibility for the products to the waste disposal stage of the life cycle after consumption. The EPR policy of OECD countries is functioned on the products sold in th…
The project 3D-LightTrans aims to create a highly flexible manufacturing chain for the low cost production of integral large scale 3D textile reinforced polymer composite parts. In a novel approach, multi-material semi-finished fabrics made of hybrid yarn are formed to deep draped pre-fixed multi-layered and multifunc…
An expression for optical absorbance in Si is derived, which is a simplification of the expression for the same quantity given by Basore. Unlike the Basore expression, the simplified expression does not require the determination of the front-surface external and internal reflectance prior to be used. For textured sola…
Cu2ZnSnS4(CZTS) is one of the most promising absorber materials for highly efficient and low cost solar cells. A cost-effective method for the production of high quality CZTS makes use of the growth of nanocrystals in an amine solution of the involved metals, which can lead to considerable carbon incorporation in the…
This paper presents the analysis of smart hybrid composite plate with embedded shape memory alloy (SMA) wires subjected to low-velocity impact. The SMA wires were embedded within the layers of the composite laminates and the numerical calculation was used in the impact analyses of the laminated hybrid composite plate.…
The wire material and the workpiece was fused together by the transient arc heat from disconnect impulse, to achieve metallurgical bonding. The process of arc striking and the arc was very short in disconnect impulse arc welding. The image signals of disconnect impulse arc and droplet transfer were acquired using spee…
Zinc phosphide (Zn3P2) thin films are grown by close-spaced sublimation. Three substrates were chosen to grow thin films: soda lime glass, mica, and quartz. C-V measurements were performed to determine the majority charge carrier concentration of the 2-5μm Zn3P2thin films. Quartz (no alkali metals) had an average char…
Abstract NLC have been incorporated in a multitude of novel structures such as photonic crystals, waveguides and plasmonic and metamaterials nanostructures to enable dynamical control of light transmission. A critical review of the underlying nonlinear optical responses of nematic as well as Blue‐Phase liquid crystals…
Abstract In this paper, we investigated effects of stabilizing blue phase liquid crystal using only reactive chiral dopant, without any other monomers and photoinitiators. First, photo‐inactive chiral dopants with high helical twist power (~166μm −1 ) synthesized by us are doped into host nematic LC to induce blue pha…
Poly (p-phenylene terephthalamide) (PPTA) was synthesized by different processes including single feeding, batch feeding and inlet nitrogen cooling. The effects of these three processes on reaction heat removal of PPTA polymerization were compared. The degree of reaction heat removal was characterized through the chan…
Plasma nitriding is a thermochemical treatment method to make the metal surface reinforced. It can be used to significantly improve the surface hardness, abrasion resistance, fatigue strength, corrosion and erosion resistance. This paper presents a study of the influence of nitriding temperature and holding time on th…