Materials Literature
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Abstract The longitudinal electronic static first hyperpolarizability of model linear phosphorus–boron chains is investigated using ab initio tools, including dynamic electron correlation corrections. The polymer presents an extremely large first hyperpolarizability (1700 × 10 −30 esu per unit cell) that can be ration…
More than three-fourths of the unburned hydrocarbon (HC) emissions in a typical drive cycle of an automotive engine are produced in the initial 2 minutes of operation, commonly known as the coldstart period. Catalyst light-off plays a very important role in reducing these emissions. Model-based paradigm is used to dev…
A fast phase modulator based on ferroelectric liquid crystal (FLC) is demonstrated and its performances characterized. For uniform alignment and pure phase modulation, we propose a new FLC device configuration using short helical pitch material and homeotropic alignment structure. This device is driven by periodic in-…
The copper enzyme galactose oxidase (GOase, EC 1.1.3.9) catalyses the oxidation of D-galactose and other primary alcohols in air to the corresponding aldehydes and hydrogen peroxide. The current mechanistic hypothesis for this two-electron redox reaction involves a Cu(I)/Cu(II) couple and the reversible oxidation of a…
We present a computationally efficient single event Monte Carlo approach for calculating dose from electrons. Analog elastic scattering and inelastic energy-loss differential cross sections for electrons are converted into corresponding discrete cross sections that are constrained to exactly preserve low-order moments…
In response to the recent wide-scale applications of lnformation Technology (I/T) in the hospitality industry, this study analyzed articles in leading hospitality research journals, including the International Journal of Hospitality Management, Cornell Hotel and Restaurant Administration Quarterly, and the Journal of…
The title compound, [La(BTC)(H2O)6]n 1 (H3BTC = benzene-1,3,5-tricarboxylic acid), has been synthesized by the hydrothermal reaction of La(NO3)3·3H2O with H3BTC and Na2CO3, and its structure was determined by single-crystal X-ray diffraction. The crystal structure is of monoclinic, space group Cc with a = 11.5289(3),…
Systematic pre-oxidation experiments in the glass transition region have been carried out on iron bearing aluminosihcate glass fibres in air. The pre-oxidized fibres are up-scanned in a simultaneous thermal analyser to a temperature of 1273 Κ under atmospheric conditions in order to measure the increase in mass, which…
This review focuses on recent progress in the study of doped semiconductor nanocrystals prepared by direct solution chemical routes. The emphasis is on materials that can be prepared and handled as high-quality colloidal nanocrystalline suspensions, allowing them to be easily processed by a variety of conventional met…
In this project, the radiation induced cross-linking in low-density polyethylene (LDPE) samples irradiated with the different dose rates of 5 MeV electron beam in the dose range of 20 up to 200 kGy were investigated and compared. The dose rate values were ranged from 13 to 300 kGy/min. The cross-linking of the samples…
Insulating polymers and their composites have been widely used in various electric apparatus or cables. Recently, the effects of interfaces (metal/insulator or insulator/insulator interfaces) on electrical insulation have attracted much attention. However, interfacial phenomena in actual insulation systems and their p…
Markedly enhanced recyclability of osmium catalyst in asymmetric dihydroxylation has been achieved by using osmylated macroporous resins bearing both residual vinyl groups and quaternary ammonium moiety.
A range of quaternised tertiary amine methacrylate-based homopolymers and copolymers were synthesised as mimics of the biopolymers implicated in biosilica formation. These synthetic polymers were evaluated for their ability to catalyse and direct the structure of silica formed by condensation of silicic acid in aqueou…
A new series of low-symmetry octasubstituted metal-free phthalocyanines with the general formula H 2 N x P β 4− x ( OBu ) 8 ( x = 0-4) were synthesized by mixed condensation of two different substituted precursors (4,5-dibutoxy- phthalonitrile and 1,4-dibutoxy-2,3-dicyanonaphthalene). Their electronic absorption spect…
We present a novel and convenient process for fabrication of arrays of nanoporous tin oxide nanorods by electrodeposition of tin into anodic aluminum oxide membranes followed by anodization of tin nanorods to create nanochannels. The nanoporous tin oxide nanorods were long and in diam, with nanochannels of in diam. Th…
Recent progress in domain analysis, which has been attained by the notable advancement of transmission electron microscopy (TEM), is reviewed by selecting certain topics related to displacive and magnetic phase transformations. Energy-filtered TEM, which separates the elastic scattering from the unwanted inelastic one…
A high-luminance and high-color-purity inorganic phosphor has been developed for the red component in ac thin-film electroluminescent devices using electron-beam evaporation. The influence of the Eu concentration on the luminescence and response characteristic of the devices was studied. A high Eu concentration causes…
The mechanisms of thermal expansion and shrinkage for sintered samples, with different relative densities, have been investigated in air during thermal cycle measurements between 50 and . The perovskite samples showed a large thermal expansion coefficient (TEC) at approximately due to a change from monoclinic and hexa…
We studied the spreading of a thin film of hexadecane oil on a hydrophobic polystyrene surface, which is partially covered with tiny water droplets. In spite of the fact that the spreading coefficient of hexadecane is slightly negative on water, the oil actually spreads faster on the droplet covered polystyrene than o…
We have successfully utilized the sol-gel method to synthesize epoxy-silica hybrid material at nanoscale. Using the sol-gel process we could overcome many disadvantages of conventional composite materials. In this research, two different methods are recommended — a one-step process and a two-step process — to synthesi…