Materials Literature
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In the present study, the stability of single-layer barrel vault space structures with three-way triangular configuration is investigated by carrying out nonlinear collapse analysis using finite element method. The effects of different parameters, such as initial geometric imperfections, load on a single node, loads o…
This study investigated the effect of hybrid surface treatment on the fatigue strength of Ti–6Al–4V alloy. The hybrid surface treatment was composed of plasma nitriding and fine particle bombarding (FPB). Plasma nitriding generated a hardened layer with no marked growth of the microstructure of the substrate, and subs…
There are many areas around the world contaminated with radioactive substances which may require remediation. The source of contamination with radionuclides varies; the most important sources include nuclear testing, radiation accidents and inadequate waste disposal practices. Contamination at such sites may present a…
Determination of the first crystalline structures of the antihistaminic drug promethazine hydrochloride (PTZ) by single crystal X-ray diffraction revealed a possible case of intergrowth of polymorphic domains that requires further experimentation for confirmation. The two crystal structures of PTZ are characterized by…
Similar to the larger members of the cucurbituril family, such as cucurbit[8]uril (Q[8]), the smallest member, cucurbit[5]uril (Q[5]), can also induce room-temperature phosphorescence (RTP) of α-naphthol (1) and β-naphthol (2). The relationship between the RTP intensity of 1 and 2 and the concentration of Q[5] or Q[8]…
Hydrogen, as well as petrochemical feedstock, can be produced by the partial oxidation of methane in an alternating-current rotating-gliding-arc plasma driven by swirling flow. The effects of the air ratio (0.6 to 1.6), height of outer cover (25 and 45 cm), supply voltage (6.6 to 11.1 kV), and gas flow rate (6 to 18 L…
Abstract Background As an important extraction technique, aqueous two‐phase extraction is especially applicable to bioseparation. This work has focused on using a novel kind of aqueous two‐phase system (ATPS), for the enantioseparation of tryptophan. Results Only limited kinds of salts could form effective phases with…
Although understanding the structural dynamics associated with ligand photodissociation is necessary in order to correlate structure and function in biological systems, few techniques are capable of measuring the ultrafast dynamics of these systems in solution-phase at room temperature. We present here a detailed X-ra…
The coupling characteristics of two-point defects modes and multi-point defects modes in two-dimensional magnonic crystals composed of Fe square rods/EuO square lattices are studied based on the plane-wave expansion method under supercell approximation. The results show that the coupling degree of these defect modes d…
Nano-object additives are used in tribological applications as well as in various applications in liquids requiring controlled manipulation and targeting. On the macroscale, nanoparticles in solids and liquids have been shown to reduce friction and wear. On the nanoscale, atomic force microscopy (AFM) studies have bee…
In-plane ultrahigh-density InAs quantum dots (QDs) were grown on GaAsSb/GaAs(001) buffer layers by molecular beam epitaxy. Lowering the growth temperature reduced the QD size, and strain interaction between QDs decreased. As a result, the ripening effect that reduces the QD density was effectively suppressed, and an I…
Abstract A series of novel polymers, glycidyl 4‐functionalized 1,2,3‐triazole polymers (functionalized GTP) were synthesized by click functionalization of glycidyl azide polymer (GAP). Quantitative functionalization of the glycidyl polymer side groups was achieved due to the high reactivity of the azide–alkyne Huisgen…
High-pressure Raman scattering measurements have been performed in wulfenite (PbMoO4) for both bulk and nanocrystalline powders up to 22 GPa. Our Raman scattering measurements evidence the phase transition from the tetragonal scheelite structure to the monoclinic M-fergusonite structure in both bulk and nanocrystallin…
Metal dodecyl sulfates of trivalent aluminium, chromium, lanthanum and gadolinium were prepared by addition of the corresponding salts to aqueous solutions of sodium dodecyl sulfate at the natural pH (ca. 6). Using X-ray diffraction, FT-IR and NMR spectroscopy, DSC, thermogravimetry and polarizing light thermomicrosco…
Ba0.4Sr0.6TiO3 ceramics by adding mental Fe powders have been fabricated via the solid-state reaction method. The microstructures and optical properties of samples are systematically studied in order to establish the effects of Fe powder additives on microwave dielectric properties of Ba0.4Sr0.6TiO3 ceramics by x-ray…
Synthetic athletic tracks and turf areas for outdoor sporting grounds may release contaminants due to the chemical composition of some components. A primary example is that of zinc from reused scrap tires (main constituent, styrene butadiene rubber, SBR), which might be harmful to the environment. Thus, methods for th…
Quasiparticle (QP) wave functions, also known as Dyson orbitals, extend the concept of single-particle states to interacting electron systems. Here we employ many-body perturbation theory in the $\mathit{GW}$ approximation to calculate the QP wave functions for a semiempirical model describing a $\ensuremath{\pi}$-con…
Influence of loading of Al2O3, Al, and Cu particles (0.5–5 μm) in an epoxy adhesive has been studied in reference to thermal stability and single lap shear joint properties of the resulting composites. The SEM studies on state of dispersion of particles in the epoxy adhesive largely reveal their homogeneous distributi…
Nanotubes of TiO2 synthesized by hydrothermal method are treated at three different temperatures (400, 600, and 800 °C). Calcinations cause phase change as evidenced from x-ray diffraction patterns. AC conductivity studies done on as prepared TiO2 and calcined samples in the frequency range 100Hz–1MHz and at various t…
Enhanced absorption of especially long wavelength light is needed to enable the full potential of semiconductor nanowire (NW) arrays for optoelectronic applications. We show both experimentally and theoretically that a transparent dielectric shell (Al2O3 coating) can drastically improve the absorption of light in InAs…