Materials Literature
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The origin of ferromagnetism in Co-doped (La,Sr)TiO3 epitaxial thin films is discussed. While the as-grown samples are not ferromagnetic at room temperature or at 10 K, ferromagnetism at room temperature appears after annealing the films in reducing conditions and disappears after annealing in oxidizing conditions. Ma…
The ground-state electronic structures of K3V(ox)3.3H2O, Na3V(ox)3.5H2O, and NaMgAl1-xVx(ox)3.9H2O (0 < x <or= 1, ox = C2O42-) have been studied by Fourier-transform electronic absorption and inelastic neutron scattering spectroscopies. High-resolution absorption spectra of the 3Gamma(t2g2) --> 1Gamma(t2g2) spin-forbi…
The structural parameters of the first five coordination shells of an Au bulk obtained from high accuracy L(3)-edge extended x-ray absorption fine structure (EXAFS) spectra in the temperature range 20-300 K are reported. Good agreement with previously reported studies is found. The effective second and third order for…
Catalytic decomposition of nitric oxide (NO) over Pd/Al 2 O 3 and Ag−Pd/Al 2 O 3 has been studied using the pulse transient response technique coupled with in situ infrared (IR) and mass spectrometry (MS) at 723−823 K. In the absence of H 2, pulsing NO over the Pd/Al 2 O 3 catalyst produces adsorbed NO species (i.e.,…
The melt rheology of four hyperbranched polymer structures with different molecular weights has been studied using nonequilibrium molecular dynamics (NEMD). Systems were simulated over a wide range of strain rates to capture the crossover behavior from Newtonian to non-Newtonian regimes. Rheological properties includi…
Abstract La 0.75 Sr 0.25 Cr y Mn 1− y O 3 (LSCM) ( y = 0.0–0.6) composite oxides were synthesized by a complexing process of combining ethylene diamine tetraacetic acid (EDTA) and citrate. X‐ray diffraction (XRD), temperature‐programmed reduction, electrical conductivity, I–V polarization, and impedance spectroscopy w…
PURPOSE: To investigate the possible role of Zn as a trigger for NSF we were using a previously established preclinical model. The depletion of endogenous Zinc ions (Zn) caused by the administration of gadolinium-based contrast agents (GBCAs) has been suggested as a possible pathomechanism for nephrogenic systemic fib…
We consider a two-band superconductor with relative phase π between the two order parameters as a model for the superconducting state in ferropnictides. Within this model we calculate the microwave response and the NMR relaxation rate. The influence of intra- and interband impurity scattering beyond the Born and unita…
Dielectric studies of molecular sieves MCM-41 filled with K(1-x)Na(x)NO(3) salts (x = 0, 0.05 and 0.10) were carried out and compared with results obtained for their bulk counterparts. The regular increase upon warming of the temperature of the reconstructive phase transition from phase II to phase I with decreasing p…
The effect of pressure on melt viscosity was investigated for five compositions along the join An(CaAl(2)Si(2)O(8))-Di(CaMgSi(2)O(6)) and four alkali silicates containing lithium, sodium, and potassium in constant ratio of approximately 1:1:1, but alkali-silica ratios are varying. The experiments were performed in an…
Simple lattice model for self-associating molecules such as methanol or tert-butanol is proposed and studied in mean-field (MF) approximation in the case of methanol. In addition to the isotropic van der Waals interaction, the hydrogen bonding is present in this model when the neighboring alcohol molecules are in appr…
Abstract Fully stabilized YSZ solid electrolyte was prepared by slip casting. The density was measured according to the Archimedes principle and the linear shrinkage was calculated from measuring the sizes of samples before and after sintering. XRD analysis was conducted to verify the phase structure of both the start…
Abstract Organic–inorganic composites composed of electrically conducting copolymer p ‐phenylenediamine‐ co‐ o ‐aminophenol and carboxylic acid functionalized multi‐walled carbon nanotubes [poly( p PD‐co‐ o AP)/c‐MWNTs] were prepared via in situ emulsion pathway using sodium dodecyl sulphate (SDS) as an emulsifier and…
A comparative study of the low temperature conductivity of an ensemble of multiwall carbon nanotubes and semiconductor nanowires is presented. The quasi one-dimensional samples are made in nanoporous templates by electrodeposition and CVD growth. Three different structures are studied in parallel: multiwall carbon nan…
Abstract A chiral diacid monomer containing L ‐phenylalanine‐9,10‐dihydro‐9,10‐ethanoanthracene‐11,12‐dicarboximido unit was successfully synthesized in four steps and used in the preparation of a series of novel optically active polyamides by direct polycondensation with diverse aromatic diamines using 1,3‐dipropylim…
Photopolymers are appealing materials for the fabrication of diffractive optical elements (DOEs). We evaluate the possibilities of polyvinyl-alcohol/acrylamide-based photopolymers to store diffractive elements with low spatial frequencies. We record gratings with different spatial frequencies in the material and analy…
Abstract The Ti‐Al‐Sn‐Zr‐Cr‐Mo‐V‐Si (Ti‐62A) alloy, an alpha‐beta alloy with high strength and fracture toughness, is currently used as an advanced structural material in aerospace and non‐aerospace applications. Thermo‐mechanical processes can be used to optimize the relationship between its strength and fracture tou…
A novel blue-emitting phosphor of Eu(2+)-activated NaMgPO(4) was prepared by combustion-assisted synthesis. Sodium dihydrogen phosphate and magnesium nitrate were used as the source of Na, P and Mg, respectively. The ratios of magnesium and phosphorus components that were dissolved into the combustion solution were ch…
Schlaue Agent(i)en: Ein makrocyclenbasierter Gadoliniumkomplex isomerisiert in Gegenwart von NADH, was zu einer Zunahme der r1-Relaxivität von 54 % führt, während die intensive Fluoreszenz verschwindet (siehe Schema). Dieses Agens sollte die Verwendung der Magnetresonanztomographie (MRI) zur Untersuchung von Gewebe-Re…
Abstract BACKGROUND: ABA‐type poly(methyl methacrylate) (PMMA) and fluorine‐containing polyimide triblock copolymers are potentially beneficial for electric materials. In the work reported here, triblock copolymers with various block lengths were prepared from fluorine‐containing difunctional polyimide macroinitiators…