Materials Literature
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Aligned Zn1–xMgxO nanowire arrays were successfully prepared on Si(111) substrates via the chemical vapor deposition (CVD) method with a mixture of ZnO, Mg, and activated carbon powders as reactants. The microstructures and optical properties of the synthesized Zn1–xMgxO nanowire arrays were investigated by X-ray diff…
Planarity disturbance in metal porphyrin macrorings produces destabilization of complexes in dimethyl sulfoxide-acetic acid and benzene-acetic acid systems, except for cases where the coordination center is additionally stabilized by endocyclic substituents and/or extra ligands. The first dissociation stage of complex…
Partial-discharge (PD) characteristics in three gases (air, argon and helium) at pressures between 101 kPa (760 Torr) and about 0.27 kPa (2 Torr) under 60-Hz ac energization were studied. Measurements for two representative electrode configurations showed that the electrical characteristics of PD (specifically, electr…
We realized a thin slice of vertically stacked pyrolytic graphite for the thermal interface use. The maximum size of the slice achieved was 37×37 mm2with a thickness about 500 μm. This system shows a heat resistance better than 20 mm2C/W, which is almost independent of the thickness. The heat resistance can be drastic…
The Born–Mayer potential has been employed to predict the phase transition pressure in four strontium monochalcogenides, namely, SrO, SrS, SrSe, and SrTe, which crystallize in the NaCl (B1) phase and with the application of pressure, transforms to the CsCl (B2) phase. The compression, bulk modulus and the first-order…
This work presents results of a comparative study conducted on breakdown voltage measurements in a glass insulators string containing several units with broken glass part. String with 16 insulator units were tested simulating a transmission line of 230 kV. Two arrangements have been adopted: (i) seven good insulators…
Abstract The high temperature decomposition transformation of lithium amide into imide has been studied by anelastic spectroscopy and thermogravimetry. At the amide-to-imide phase transformation a huge elastic modulus increase takes place, whose change increases with the evolution of the decomposition. The modulus var…
The new mineral species birchite, idealized formula Cd 2 Cu 2 (PO 4 ) 2 (SO 4 )·5H 2 O, occurs on specimens from the Block 14 Opencut, Broken Hill, New South Wales, Australia, as sprays and aggregates of crystals to 0.75 mm across on a host rock composed of quartz, garnet, galena, chalcopyrite, and fluorapatite. It is…
This paper describes the calibration of high-g triaxial piezoresistive accelerometer for studies of normal and oblique penetrations into concrete targets. In order to determine the dynamic sensitivity, shock calibration tests were performed using a Hopkinson bar at up to 80,000 g acceleration level and the laser-grati…
We demonstrated that an electronic field-effect transistor (FET) can be made from patterned monolayer or bilayer graphene nanoribbons. The FET performance can be achieved regardless of structural defects (either edge defects or topological defects). The I-V characteristics of resulting FETs are similar to those made f…
Abstract Bi(Ni0.5Ti0.5)O3 (BNT) ceramics with a perovskite structure, which were almost impossible to fabricate under atmospheric pressure, were synthesized at a high pressure of 6 GPa using a multianvil-type high-pressure apparatus. It was confirmed that the synthesized samples had a multidomain structure and ferroel…
The electrical and optical properties of polymer-silicon composites with particles incorporated by different means have been studied. It is shown that both when silicon particles are embedded in a carbazole-containing polymer matrix and in the case of a pure polymer, the I–V characteristics are nonlinear and asymmetri…
Minimizing the thermal resistance of thermal interface material (TIM) bondlines is of interest to the electronics industry. The thermal interface material class examined in this study comprises epoxy based adhesives in which conductive filler particles are suspended. When used to assemble a thin bondline (on the order…
Nanocomposite materials of poly(vinyl acetate) (PVAc) and organoclay were fabricated, in order to be utilized as dielectric materials of the organic thin film transistor (OTFT). Spin coating condition of the nanocomposite solution was examined considering shear viscosity of the composite materials dissolved in chlorof…
Abstract magnified image An efficient and convenient synthesis of 5,10,15‐triarylcorroles by the condensation of aryl aldehydes with pyrrole catalyzed by Amberlyst 15 followed by oxidative cyclization with 2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone (DDQ) at room temperature has been reported. Amberlyst 15 is more effic…
We have successfully prepared silicon quantum dots / amorphous silicon carbide multilayers by thermal annealing of stoichiometric hydrogenated amorphous silicon carbide (a-SiC:H) / silicon rich hydrogenated amorphous silicon carbide (a-Si1+xC) multilayers for thin-film solar cell applications. By hydrogen plasma treat…
Abstract Summary: In order to further evaluate the potential of FT‐IR spectroscopic investigations on molecular processes during tensile testing experiments, the behavior of monolayer LLDPE films, made with ethylene‐butene and ethylene‐octene copolymers, was studied. Additionally, multilayer LLDPE films based on the s…
The optical properties of diamond-like carbon (DLC) films obtained by plasmachemical deposition on Cd1 − x Zn x Te (x ∼ 0.04) single crystals have been studied by ellipsometry. The ellipsometric data have been interpreted within the framework of a three-layer model of the DLC film-semiconductor crystal refractory syst…
EBPVD (electron beam physical vapor deposition) technique offers independence and freedom in control of microstructure and composition of the coating via manipulation of controlling process parameters such as pressure level, substrate temperature, gas content (in case of reactive evaporation), power (voltage, current)…
We report new osmium complexes based upon the 2-[(diphenylphosphanyl)-methyl]-pyridine ligand. Hexafluorophosphate salts of bis(3,4,7,8-tetramethyl-1,10-phenantholine)(2-[(diphenylphosphanyl)-methyl]-pyridine)osmium(II) ( 1 ), and bis(2-[(diphenylphosphanyl)-methyl]-pyridine)(4,7-diphenyl-1,10-phenantholine)osmium(II)…