Materials Literature
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A liquid-crystal (LC) lens driven by two voltages is reported. The lens has a focal length that is electrically tunable. The range of the variable focusing power is very wide, covering approximately 0.8-10.7 D. In the entire focal range the LC lens maintains high optical quality. The LC lens can be driven in a simple…
The heat capacity of isotopically enriched 28Si, 29Si, 30Si samples has been measured in the temperature range between 4K and 100K. The heat capacity of Si increases with isotopic mass. The values of the Debye temperature for the three isotopic varieties of silicon have been determined. Good agreement with the theoret…
The structural properties under hydrostatic pressure up to 3 GPa of the layered rare earth carbide halide superconductor Y2C2I2 are studied by neutron powder diffraction at room temperature. The compressibilities are anisotropic, such that the compressibility perpendicular to the layers being approximately twice as la…
The remarkable polarization properties of the synchrotron light have lead to the advent of modern synchrotron-related spectroscopic studies with angular and/or magnetic selectivity. We give here an overview of the prominent aspect of the polarization of the light delivered by a bending magnet, and some dichroic proper…
Upon reduction with alkali metals, single-wall carbon nanotubes (SWNTS) are shown to form polyelectrolyte salts that are soluble in polar organic solvents without any sonication, use of surfactants, or functionalization whatsoever, thus forming true thermodynamically stable solutions of naked SWNTs.
Ion micro‐probe imaging of the aragonite skeleton of Pavona clavus , a massive reef‐building coral, shows that magnesium and strontium are distributed very differently. In contrast to strontium, the distribution of magnesium is strongly correlated with the fine‐scale structure of the skeleton and corresponds to the la…
On the basis of a fundamental property of nanoparticles, the self-assembling at a liquid-liquid interface to form "colloidosomes", a heterogeneous reaction takes place on the exposed surface of the nanoparticles to produce the heterodimers of two distinct nanospheres, which can be modified by two different functional…
An extensive level of theory study is performed on diatomic chalcogen defects in alkali halide lattices by density functional theory methods. A variety of exchange correlation functionals and basis sets are used for the calculation of electron paramagnetic resonance (EPR) parameters of XY (X, Y = O, S, Se) molecular i…
Single-walled carbon nanotubes (SWNTs) were synthesized in a mixed gas of H 2 and Ar by AC arc discharge. The catalyst used in the synthesis was a single Fe catalyst. SWNTs containing a negligible number of nanoparticles were obtained. A novel purification method, in which synthesized soot is heated and oxidized in si…
Conventional medical x-ray imaging, based on the transmission of primary photons, works well to distinguish between hard and soft tissues. Up to 90% of the photons that reach the image receptor, however, are coherently or incoherently scattered, and so there is growing interest in utilizing scattered x rays for diagno…
Switching dynamics have been investigated in homogeneously aligned 5 µm thin cell filled with (FLC-6980) ferroelectric liquid crystal mixture using field reversal method and Sawyer Tower method. The effect of applied voltage and temperature on switching time has been studied. It has been observed that switching time d…
A novel and convenient method of thermo-immersion was used to fabricate of a large of lead–bismuth (Pb–Bi) eutectic nanoparticles on an uniform size anodic aluminum oxide (AAO) template. The AAO with a 60 nm pore diameter was used as a template for nanoparticles nucleation and growth. Both Pb–Bi and AAO were placed in…
Characterization and Alignment Properties on Polyimide Surface Using Polymer Films for Flexible Liquid Crystal Displays, Hwang, Jeoung-Yeon, Nam, Ki-Hyung, Kim, Jong-Hwan, Seo, Dae-Shik, Suh, Dong-Hack
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…