Materials Literature
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The phenomenon of softening of crystalline materials by alloying, which is promising for controlling mechanical properties of materials, is due to the occurrence of an additional channel of facilitated formation of dislocation kinks at impurity centers. This effect is related to the kink mechanism of dislocation motio…
Intense blue and red upconversion emissions were obtained in Tm3+ doped tellurite glass when codoped with Yb3+ ions on pumping with 798nm radiation. The highest intensity of the blue emission was found for glasses with 0.5mol% Tm3+ and 6.0mol% Yb3+. From a study of the dependence of the upconversion intensity on excit…
A computational study at the level of density functional theory (DFT) was carried out to investigate the influence of carbon doping (C-doping) on the 11 B and 14 N quadrupole coupling constants (CQ) in the (6,0) single-walled boron-nitride nanotube (BNNT). To this aim, a 10 Å length of BNNT consisting of 24 B atoms an…
Scatterometry is an optical technique that has been studied and tested in recent years in semiconductor fabrication metrology for critical dimensions. Previous work presented an iterative linearized method to retrieve surface-relief profile parameters from reflectance measurements upon diffraction. With the iterative…
Magnesium and zinc complexes of azaphthalocyanines (AzaPc) with eight peripheral aromatic (phenyl) or heteroaromatic (pyridyl, thienyl, furyl) substituents are studied from the point of view of their singlet oxygen (Φ Δ ) and fluorescence (Φ F ) quantum yields, and UV-vis absorption spectra. Zn complexes have higher Φ…
To lower the insulation specifications (specifically, the lightning impulse withstand voltage) of oil-immersed transformers and thus cut the equipment cost while maintaining the high reliability in its insulation performance, it is necessary to grasp in an organized way the insulation characteristics under non-standar…
Structural and optical properties of single crystal Zn1−xMgxO nanorods (0≤x≤0.17) are studied experimentally and theoretically. Structural analyses indicate that the nanorods grown on Si substrates are oriented in the c-axis direction and the nanorods possess the single-crystalline hexagonal structure with the Mg inco…
Carbon black and activated carbon were produced from bamboo (Gigantochloa scortechinii) using pyrolysis (at 900°C) and zinc chloride (ZnCl 2 ) chemical activation (at 700°C) and used as a filler in polyester composites. The composites were prepared at 10, 20, 30, and 40% filler loading. The effects of water absorption…
The mechanical properties of a homologous series of polyolefin block copolymers comprised of glassy poly(cyclohexylethylene) (C), elastomeric poly(ethylene- alt -propylene) (P), and semicrystalline poly(ethylene) (E) are documented. Monodisperse CPEPC, CPE, and CEPEC with mass fractions w C ∼ 0.39−0.44 and 0 ≤ ξ ≤ 1,…
Relaxor ferroelectrics of 0.5Pb(Zn1∕3Nb2∕3)O3–0.5Pb(Zr0.47Ti0.53)O3 (0.5PZN–0.5PZT) near the morphotropic phase boundary (MPB) were prepared using the conventional oxide mixing method. The influence of sintering temperature on the phase transition and dielectrical response in the relaxor-ferroelectric-system 0.5PZN–0.…
We present an inverse scattering approach for the bulk electromagnetic characterization of composite materials, based on a prior proof that artificial metallo-dielectric photonic crystals can be described by effective highly resonant response functions in a wide frequency range, including several passbands/bandgaps. T…
Abstract Composites of carbon nanotubes (CNT) in polymeric matrices have attracted considerable attention in the research communities due to their good electrical conductivity, high stiffness and high strength at relatively low CNT contents. Effective utilization of CNT in composites depends primarily on the ability t…
A novel polystyrene (PS)/clay nanocomposite was synthesized using a simple emulsion polymerization method in the presence of sodium ion exchanged montmorillonite (Na‐MMT). Prior to the radical polymerization procedure with potassium persulfate (KPS) as an initiator, the hydrophobic styrene monomer was intercalated int…
<abstract language="eng">Special clays are a group of clays different from the large volume of clay mineral products named "Industrial Clays": kaolins, ball clays, refractory clays, bentonites, fuller's earths, common clays. Two groups of special clays exist: rare, as in the case of hectorite and sepiolite and restric…
This paper models steady state acoustic release of Doxorubicin (Dox) from Pluronic P105 micelles using Artificial Neural Networks (ANN). Previously collected release data were compiled and used to train, validate, and test an ANN model. Sensitivity analysis was then performed on the following operating conditions: ult…
Both the modulus and hardness of a conventional methylsilsesquioxane-type organosilicate, typically synthesized from the methyltrimethoxysilane monomer, can be substantially improved by incorporating organic bridging units through additions of the bis(triethoxysilyl)ethane monomer. The microstructural basis for these…
The capability of different organic acids to produce a derivative of PHB [poly(3-hydroxybutyric-co-3-hydroxyvaleric acid), P(3HB-co-3HV)] was examined in shake flask cultivations. Propionic and valeric acids demonstrated the potential to produce P(3HB-co-3HV) under nitrogen limiting conditions at 30 degrees C. The add…
Nanostructural twin disks of zinc oxide with high yield were fabricated by vapor-phase transport using a mixture of zinc oxide, indium oxide, and graphite powders as source material. The twin disk consisted of two identical hexagonal disks with a size of about 1.5 μm in diagonal and 100 nm in thickness. The scanning e…
Abstract The U.S. Department of Energy (DOE) Office of Fossil Energy's (FE) National Energy Technology Laboratory (NETL), in partnership with private industry, educational institutions and national laboratories, is leading the development and demonstration of high efficiency solid oxide fuel cells (SOFCs) and fuel cel…
Abstract— SnO 2 is considered to be a promising alternative material for indium tin oxide (ITO), which is used for thin‐film transparent electrodes in flat‐panel displays (FPDs) and is facing a serious indium depletion problem. However, annealing processes in the manufacture of plasma‐display panels (PDPs), which are…