Materials Literature
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The widespread use of vacuum techniques for the development of coated conductors, in which buffer and superconducting (REBa 2 Cu 3 O 7- ) layers are deposited epitaxially on a substrate, is well established in the research environment. However, obtaining uninterrupted deposition at high speed, increasing flexibility i…
This work investigates the thermal stability and physical and barrier properties of two species of plasma-enhanced chemical-vapor-deposited (PECVD) amorphous silicon–nitrocarbide (α-SiCN:H) films with different hydrogen contents and dielectric constants of less than 5. It is found that the α-SiCN:H film with a higher…
\n\t\t\t\t\tA thermomechanical processing (TMP) structure map is proposed that plots the critical strains required for dynamic recrystallization along with the grain sizes that result. These maps are useful in identifying the limits to grain refinement and designing hot working processes. They are re…
A new method is proposed to drive a liquid crystal lens with no defects occurring. A voltage difference remains between the two ends of one of the lens' electrodes for a short time and an in-plane electric field forms in the liquid crystal, making the total field tilt to one side. The directors then rotate in the same…
One‐step electrodeposition of pyrrole on octadecyltrichlorosilane‐ (OTS) patterned silicon wafers results in positively patterned polypyrrole (PPy) structures, i.e., PPy deposits on the OTS‐covered area. In contrast, negative patterns are obtained on an indium tin oxide surface. The Figure shows electrically isolated…
A versatile approach to the preparation of hyperbranched polymers , in which an inimer is used to assemble a charge transfer complex (CTC) with conventional vinyl monomers, is reported. A novel hyperbranched fluoropolymer (see Figure) has been successfully synthesized through the copolymerization of chlorotrifluoroeth…
Following the breakthrough for cast magnesium products, interest is now spreading to wrought applications - triggering a variety of technological questions. A major bottleneck in the manufacture of magnesium sections (profiles) by conventional hot extrusion is the low productivity, with extrusion speeds typically five…
Solution thermodynamics and mutual diffusivity of the system carbon dioxide−molten poly(ε-caprolactone) (PCL) have been investigated experimentally in the temperature range 70−85 °C and at pressures up to 6.5 MPa. Sorption data have been interpreted on the basis of Sanchez−Lacombe lattice theory. Sanchez−Lacombe param…
Ferroelectric (Bi,R) 4 Ti 3 O 12 [R: rare earth] thin films were synthesized by the chemical solution deposition (CSD) method. Heat treatment above 600°C was required for the fabrication of crystalline (Bi,R) 4 Ti 3 O 12 thin films of Bi-layered perovskite structure on Pt/TiO x /SiO 2 /Si substrates. The orientation o…
SrBi 4- x La x Ti 4 O 15 and Sr 2 Bi 4- x La x Ti 5 O 18 ceramic samples with different lanthanum content, in which x is 0.00, 0.10, 0.25, 0.50, 0.75, 1.00, have been prepared by the solid-state reaction method. It is found that La doping does not change the crystal structures of SrBi 4 Ti 4 O 15 and Sr 2 Bi 4 Ti 5 O…
Abstract For Abstract see ChemInform Abstract in Full Text.
A new beta titanium alloy group which exhibits multi functions, such as, ultra-low elastic modulus, ultra-high strength, huge elasticity, clayey plasticity at room temperature without work hardening, Elinvar and Invar properties, has been developed. These ''super'' properties are attributable to an arcane feature in r…
We have fabricated the Nd 3+ -doped mixed structure, Y 3 Sc x Al 5- x O 12 , polycrystals by the sintering method and studied them spectroscopically as potential laser media. Using the Judd-Ofelt theory to analyze the optical strength measured in absorption spectra, the parameters of oscillator strengths and fluoresce…
The relation between phase field and discontinuous models for crystal steps is analyzed. Different formulations of the kinetic boundary conditions of the discontinuous model are first presented. We show that (i) step transparency, usually interpreted as the possibility for adatoms to jump through steps, may be seen as…
The catalytic decomposition processes of NH 3 on heated W surfaces were examined by employing laser spectroscopic techniques. H atoms and NH 2 radicals were identified as primary decomposition products on the catalyzer surfaces. The effective enthalpies for the production of these species were both determined to be 15…
PURPOSE: The purpose of this study was to demonstrate that surgically implanted, controlled-release, biodegradable polilactofate microspheres (Paclimer) can be used safely to bypass the blood-brain barrier and deliver paclitaxel to malignant brain tumors. EXPERIMENTAL DESIGN: The rate of paclitaxel release from Paclim…
A Multimode-Type Transflective Liquid Crystal Display Using the Hybrid-Aligned Nematic and Parallel-Rubbed Vertically Aligned Modes, Lee, Seo Hern, Park, Kyoung-Ho, Gwag, Jin Seog, Yoon, Tae-Hoon, Kim, Jae Chang
Fixed-node diffusion quantum Monte Carlo (DMC) calculations of the ground and excited state energetics of the neutral vacancy defect in diamond are reported. The multiplet structure of the defect is modeled using guiding wave functions of the Slater-Jastrow type with symmetrized multideterminant Slater parts. For the…
We describe the fabrication of metallic Cu spiral/helical nanostructures prepared via selective electroless metallization of a phospholipid microtubule template. The metallization template is created through selective, sequential adsorption of the oppositely charged polyelectrolytes, sodium poly(styrenesulfonate) (PSS…
Clostridium thermocellum produces an extracellular multienzyme complex, termed the cellulosome, that allows efficient solubilization of crystalline cellulose. The complex is organized around a large noncatalytic protein subunit, termed CipA or scaffoldin, and is found either free in the supernatant or cell bound. The…