Materials Literature
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In this study, using inductively coupled Cl 2 /Ar plasmas (ICP), the effects of various process conditions such as source power, bias power, Cl 2 /Ar gas ratio, and ultraviolet (UV) ray were investigated to obtain high Cu etch rates without remaining any nonvolatile etch products. Due to the formation of nonvolatile c…
The kinetics of the complete combustion of propane and toluene at very low concentrations in air (0.45 and 0.3 mol % in air, respectively) over iron-doped ZrO 2 (cubic) catalyst (Fe/Zr = 0.25) at different temperatures (598−723 K) in kinetic control regime have been investigated. The combustion rate data could be fitt…
Textured (1- x )PbMg 1/3 Nb 2/3 – x PbTiO 3 , (PMN– x PT), ceramics were synthesised by the homo template grain growth (HTGG) technique using PMN–PT nanoparticles and cubic single crystals seeds (templates). The orientation of the templates was obtained during tape casting. Sintering was performed under controlled O 2…
The impurity effects on resonant Andreev reflection through a normal-metal/carbon-nanotube/superconductor system are studied theoretically. The Andreev reflection current versus gate voltage clearly shows that the impurity can break the electron-hole symmetry in nanotubes, and the symmetry broken depends distinctly on…
The present work investigates the structure of large polystyrene (PS) chains in two different solvents in the presence of octa- n -propylsilsesquioxane (SILS) molecules. Both solvents are good solvents for the PS chains. Viscosity measurements combined with static and dynamic light scattering revealed a significant sh…
Abstract Some relaxation tests under uniaxial tension were performed to characterize the relaxed state of high‐density polyethylene (HDPE). These experimental results are necessary to describe and model the mechanical response in large strain by using the distribution of nonlinear relaxation (DNLR) approach developed…
This book describes the solid state behaviour of organic materials based the polymethylene chain, i.e., the functional molecular component of polyethylenes, soaps, detergents, edible fats, lipids, oils, greases, and waxes. Along with chain unsaturation and branching, polydispersity, i.e., the aggregation of several po…
Endothelialization of synthetic surfaces has been challenging with limited success thus far. We investigated the hypothesis that covalent attachment of cholesterol to polyurethane via the urethane nitrogen groups would create a high-affinity surface for attachment and adhesion of endothelial cells. Cholesterol was cov…
UV curable jet inks were ejected by a bubble-jet cartridge onto a glass substrate and fixed by a UV curing reaction to prepare LCD color filters. The rheology of jet inks was adjusted by changing the surfactants and monomers, in order to achieve good jetting directionality, uniform drop size and excellent wetting on t…
Fatigue-free Bi3.25La0.75Ti3O12 (BLT) thin films were grown on LaNiO3,RuO2, and La0.5Sr0.5CoO3 bottom electrodes in a microwave furnace at 700 °C for 10 min. The remanent polarization (Pr) and the drive voltage (Vc) were in the range of 11–23μC∕cm2 and 0.86–1.56 V, respectively, and are better than the values found in…
BaTiO 3 samples were aerodynamically levitated and laser melted under containerless conditions and quenched with a twin-roller apparatus. The microstructure of the BaTiO 3 samples became more refined with increasing undercooling level prior to quenching. A two-phase microstructure consisting of perovskite BaTiO 3 and…
Porous silicon (PS) technology is, for the first time, used to grow ZnO nanowires on the surface of a PS substrate with a rough morphology without any catalyst. The characteristics of these nanowires were investigated by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energ…
Rapidly frozen aqueous solutions containing variable amounts of dissolved formaldehyde (0.1, 5, 7, 10, 15, and 20 mol %) have been analyzed by micro-Raman spectroscopy at ambient pressure and low temperature. The importance of the formladehyde-ice system has been repeatedly quoted in various contexts, such as atmosphe…
Abstract Using an opticaldetector we followed the transient state of blends and composites, including a reactive blending during extrusion. The detection system is composed of a slit‐die with transparent windows fixed at the extruder exit, an optical arrangement with a W incandescent light microbulb with fixed lumines…
The quarter-wavelength (λ∕4) acoustic matching layer, a vital component in medical ultrasonic transducer, can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. Composite materials are widely used as matching materials in order to cover the wide acoustic impedance range…
We report optical absorption and luminescence measurements on the $1.4\text{\ensuremath{-}}\mathrm{eV}$ center in diamond. We show that the zero-phonon lines have a temperature-dependent Ni-isotope shift, that the isotopic shifts induced by carbon and nickel are opposite in sign, and that a local vibronic mode is pres…
The effects of Dy addition on the electrical properties of BaTiO 3 have been studied by analyzing equilibrium electrical conductivity as a function of temperature, oxygen partial pressure (Po 2 ) and composition. In(Ba 1- x Dy x )TiO 3+0.5 x , the conductivity follows the -1/4th power dependence of Po 2 at high oxygen…
A method of fabricating gold nanocrystals coated polypyrrole (PPy) tubules was developed by coating carboxylic acid–thiol-capped or citrate-reduced gold nanoparticles on polypyrrole tubule templates. Electrostatic interaction between gold nanoparticles and PPy tubules was used as a driving force for this assembly proc…
The kinetics of the thermal cis-trans isomerization was determined in a series of crown ethers containing the azobenzene moiety incorporated into the crowns of various sizes (10- to 19-membered crowns), dissolved in liquid isooctane and in polymer matrixes (PMMA and polystyrene). The kinetic parameters (activation ene…
Template-directed processes involving polysaccharide, dextran, and preformed zeolite crystals/nanoparticles are used to prepare elaborate porous frameworks of interconnected filaments of NaY zeolite/silica nanoparticles, as well as macroscopic fibers of crystallographically aligned silicalite nanocrystals (see picture…