Materials Literature
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CuO three-dimensional (3D) flowerlike nanostructures were successfully synthesized on copper surface by a simple solution method. CuO nanostructure was systematically studied by scanning electron microscopy, transmission electron microscopy, x-ray powder diffraction, and x-ray photoelectron spectrum. The factors to co…
Doped with PbSe nanocrystals of different sizes, a multiquantum-dot-doped fiber amplifier (MQDFA) is proposed. Performance of the MQDFA is simulated by solving light-propagation equations and rate equations for a three-level system, and by applying superposed emission-absorption cross sections of the quantum dots (QDs…
A kinetic model is presented giving a mathematical description of batch culture of Pseudomonas putida PGA1 grown using saponified palm kernel oil as carbon source and ammonium as the limiting nutrient. The growth of the micro-organism is well-described using Tessier-type model which takes into account the inhibitory e…
We have found that the polymerization process was 4,500 times faster when a self-doped polyaniline nanocomposite was fabricated using in situ polymerization in the presence of single-stranded DNA-dispersed and -functionalized single-walled carbon nanotubes (ssDNA-SWNTs). More importantly, the quality of the composite…
The electrochromic properties of an electrodeposited polymer composite consisting of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(3-methyl-2-{[3-(4-vinyl-benzyl)-3 H -benzothiazol-2-ylidene]-hydrazono}-2,3-dihydro-benzothiazole-6-sulfonic) acid (polyABTS) are reported. Films of this polymer composite exhib…
As-synthesized 3.5-nm sphalerite CdS was hydrothermally coarsened in a series of Na 2 S solutions at 150 °C, aiming to understand the effect of the Na 2 S additive on the growth and phase-transition mechanisms. X-ray diffraction (XRD) data indicate that, with increasing Na 2 S concentration, both the growth rate and t…
This work presents a measuring system for PDs at repetitive voltages with short rise times, based on a coupling device adapted for this kind of voltages and a method for removing contributions from the applied voltage. The potential of the system has been demonstrated through measurements of PDs around a needle in air…
The optical response of materials based on gold nanoparticle assemblies depends on many parameters connected to both material morphology and light excitation characteristics. The optical energy absorbed is then converted into heat through different nanoscale energy exchange mechanisms. This heating subsequently modifi…
Zinc indium oxide films were deposited by the rf magnetron sputtering method using a (ZnO)3In2O3 target. The films were prepared at 573 K in various Ar/O2 sputtering gases (O2 content: 0%–25%). The effect of the oxygen gas content in the sputtering gas on the structural, optical, electrical, and thermoelectric propert…
Abstract The purpose of this study was to investigate the clay mineral phases in a Rhodic Acrisol soil and to discuss their evolution in subtropical conditions. Prairie and forest soil profiles were sampled and clay fractions of the parent material and soil horizons analysed by X-ray diffraction (XRD) at the Federal U…
As part of an ongoing investigation of the scintillation properties of zinc-oxide-(ZnO)-based scintillators, several melt-grown, ZnO single crystals have been characterized using alpha-particle excitation, infrared reflectance, and room temperature photoluminescence. The crystals, grown by Cermet, Inc., using an oxyge…
A transient technique is developed to measure the thermal diffusivity of one-dimensional microscale wires. In this technique, the thin wire is suspended over two copper electrodes. Upon fast (nanosecond) pulsed laser irradiation, the wire’s temperature will quickly increase to a high level and then decrease gradually.…
There is a critical need for adequate reconstruction of soft tissue defects resulting from tumor resection, trauma, and congenital abnormalities. To be sure, adipose tissue engineering strategies offer promising solutions. However, before clinical translation can occur, efficacy must be proven in animal studies. The a…
Two new [1,2,3]‐triazole‐based liquid crystalline compounds were synthesised through Cu(I)‐catalyzed 1,3‐dipolar cycloaddition of 1‐azido‐4‐decyloxybenzene or 1,3‐diazidobenzene with terminal acetylenes. Their mesophases were characterised by a combination of differential scanning calorimetry and polarising optical mi…
This study applies aimless shooting and likelihood maximization to determine the molecular mechanism in the solid state polymorph transformation in terephthalic acid from over 500 candidate order parameters. The crystals examined here extend the range of crystal sizes considered in our previous work (J. Amer. Chem. So…
Surface analysis of 400 kV silicone rubber composite insulators is presented. These insulators have experienced 15 years of service on a coastal 400 kV transmission line. Inspection of the insulators shows low levels of degradation through cracking and oxidation of title surface. This has been quantified by microscopy…
The results of a mass-spectrometric analysis of hydrogen release from palladium and zirconium samples under the action of accelerated electrons (with an energy of 40 keV and a current density of 3 to 30 μA/cm 2 ) and x-rays (with energies of 40 and 120 keV) are presented. The amount of hydrogen removed from these samp…
Conversion of UO 2 into uranyl nitrate in liquid N 2 O 4 in the presence of water was studied. The completeness of conversion of oxides in spent nuclear fuel (SNF) into nitrates is determined by the temperature and reagent ratio. The conversion of uranium oxides is complete in 2–6 h at 70–120°C and molar ratio [UO 2 ]…
TiC/Si3N4 composites were prepared using the β-Si3N4 powder synthesized by self-propagating high-temperature synthesis (SHS) and 35 wt.% TiC by spark plasma sintering. Y2O3 and Al2O3 were added as sintering additives. The almost full sintered density and the highest fracture toughness (8.48 MPa·m½) values of Si3N4-bas…
The equilibrium lattice constant, the cohesive energy and the electronic properties of light metal hydrides Li X H 3 and X LiH 3 ( X = Be, B or C) with perovskite lattice structures have been investigated by using the pseudopotential plane-wave method. Large energy gap of LiBeH 3 indicates that it is insulating, but o…