Materials Literature
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The photophysics of MEH-PPV incorporated into the pores of periodic silica hosts has been investigated in an effort to understand the role played by interchain aggregation and chain morphology in polaron production. In this work, guest/host interactions were used to incorporate MEH-PPV into the straight, homogeneous p…
The substitution behavior and lattice parameter of barium titanate between solid_solubility with a dopant concentration in the range of 0.25 to 1.5 mol% are studied. The influences of dysprosium-doped fraction on the grain size and dielectric properties of barium titanate ceramic, including dielectric constant and bre…
New experimental results were obtained for the mutual sensitization of the oxidation of NO and ethane and NO and ethylene in fuel-lean conditions. An atmospheric fused-silica jet-stirred reactor operating over the temperature range 700–1150 K was used. The initial carbon mole fraction was 2500 ppm whereas that of NO v…
An efficient computational method for locating minimum-energy crossing points (MECPs) between potential-energy surfaces in spin-crossover transitions and nonadiabatic spin-forbidden (bio)chemical reactions is introduced. The method has been tested on the phenyl cation and the computed MECP associated with its radiatio…
Abstract Gold nanoparticles have been incorporated with high efficiency into thermoresponsive hydrogel spheres, due to the suitable relationship of the nanoparticles and pore sizes given by the gel network. The hydrogel loaded with nanoparticles remains thermoresponsive, and the loaded gold nanoparticles exhibit littl…
The sinterability and electrical properties of (K 0.5 Na 0.5 )(Nb 0.7 Ta 0.3 )O 3 ceramics were investigated as functions of K 5.4 Cu 1.3 Ta 10 O 29 (KCT) sintering aid content. The (K 0.5 Na 0.5 )(Nb 0.7 Ta 0.3 )O 3 ceramics showed a perovskite single phase and a high density at KCT contents ranging from 0.23 to 0.38…
Abstract Dipole/dipole electrostatic attraction was used for the first time for disassembling the single-walled carbon nanotube (SWCNT) bundles. A self-assembled zwitterionic monolayer (SAZM) was created by modification of the SWCNT bundles with a sulfonate/quaternary-ammonium type of zwitterionic surfactants. The hea…
High-quality NaNbO 3 (NN) thin films were epitaxially grown on a (100)SrTiO 3 substrate by pulsed-laser deposition. NN films with a flat surface morphology were obtained, when the films were grown slowly at high substrate temperatures, high oxygen partial pressures, and low laser energy densities. In order to characte…
This Letter focuses on the plastic response of a material, treated as a fluid, when subjected to sliding interactions. The analysis couples momentum conservation with material flow laws to predict velocity and strain-rate profiles that develop during sliding. The profiles depend on the strain-rate sensitivity. The spa…
Spectral properties of one-dimensional tungsten gratings with various depths and widths of grooves were investigated by means of finite-difference time-domain simulation with a multi-Lorentz model. Shallow gratings showed a strong absorption peak due to surface plasmon polaritons when the oscillation of the electric f…
Four properties related to left-handed metamaterials are studied numerically: transmission within a stop-band, backward phase, negative refraction, and partial focusing. The unit cell of the metamaterial under study is composed of a rod and a ring originally proposed at infrared frequencies and redesigned here at micr…
Abstract— Transparent and electrically conductive coatings and films have a variety of fast‐growing applications ranging from window glass to flat‐panel displays. These mainly include semiconductive metal oxides such as indium tin oxide (ITO) and polymers such as poly(3,4‐ethylenedioxythiophene) doped and stabilized w…
One-dimensional (1D) WO2 nanorods were synthesized by hot-filament metal vapor deposition at high-pressure Ar flow without using any catalyst. The 1D WO2 nanorods grew on the roots and were a few micrometers long and 50–100nm wide. The x-ray diffraction pattern shows that the as-synthesized 1D WO2 nanorods are the mon…
(Mn, Co)-codoped ZnO films have been synthesized on c-sapphire (0001) by a radio-frequency magnetron sputtering system in which two targets were sputtered together. X-ray-diffraction measurements indicate that the films are highly c-axis oriented. X-ray photon spectra show that the doped Mn and Co ions in (Mn, Co) ZnO…
We have fabricated field-effect transistors with single-crystalline ZnO channels consisting of high-quality epitaxial films grown on lattice-matched (0001) ScAlMgO 4 substrates by laser molecular-beam epitaxy. Amorphous alumina gate insulators are deposited on the top of the ZnO films using either RF magnetron sputter…
Materials in the Ti–Al–C ternary system commonly contain three coexisting phases, Ti 3 AlC 2 , Ti 2 AlC, and TiC. Quantitative phase analysis in this ternary system was investigated using X-ray diffraction. First, nonoverlap diffraction peaks were selected: the (002) peak at 2 θ =9.5° for Ti 3 AlC 2 ( I ∕ I 0 =26.5),…
A constitutive model for the restoring force in pseudo-elastic shape memory oscillators is proposed. The model is developed in a thermomechanical framework and allows one to predict the temperature variations that typically arise in shape memory materials under dynamical loading. A peculiar feature of the model is tha…
Transparent copper nanorod/nanowire arrays and anodic alumina oxide composite films have been prepared by alternating current electrodeposition, and their linear optical properties have been systematically characterized by absorption spectra. In the experimental spectra, there exist transverse and longitudinal resonan…
Ceramics of type (BiFeO 3 ) x (PbTiO 3 ) 1-x have been fabricated using conventional mixed oxide synthesis. The strain field (xE)/polarisation field (PE) behaviour of compositions x = 0.80, 0.70, 0.65 and 0.60 have been studied. At high field strengths, piezoelectricity can be instilled in these materials. The composi…
MOTIVATION: We investigate the relationship between the quality of models of protein structure and their usefulness as search models in molecular replacement, a widely used method to experimentally determine protein structures by X-ray crystallography. RESULTS: We used the available models submitted to the Critical As…