Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The theoretical formulation of x-ray resonant magnetic scattering from rough surfaces and interfaces is given for specular reflectivity. A general expression is derived for both structurally and magnetically rough interfaces in the distorted-wave Born approximation (DWBA) as the framework of the theory. For this purpo…
The theoretical formulation of x-ray resonant magnetic scattering from rough surfaces and interfaces is given for the diffuse (off-specular) scattering, and general expressions are derived in both the Born approximation (BA) and the distorted-wave Born approximation (DWBA) for both single and multiple interfaces. We a…
We predict a different mechanism of enhancement of ferromagnetic phase transition temperature ${T}_{c}$ in uniaxially stressed diluted magnetic semiconductors (DMS) of p type. Our prediction is based on comparative studies of both Heisenberg (inherent to undistorted DMS with cubic lattice) and Ising (which can be appl…
Quantum mechanical calculations are used to optimize the molecular first hyperpolarizability of organic chromophores and statistical mechanical calculations are used to optimize the translation of molecular hyperpolarizability to macroscopic electro-optic activity (to values of greater than 100 pm V −1 at telecommunic…
We present a general derivation of the non-Fickian behavior for the self-diffusion of identically interacting particle systems with excluded mutual passage. We show that the conditional probability distribution of finding a particle at position x(t) after time t, when the particle was located at x(0) at t=0, follows a…
Electrolysis of water has been implemented to inject hydrogen into the SrTiO3 single crystal doped with 1 wt % of Nb. Direct evidence of OH− group formation in the Nb:SrTiO3 single crystal has been obtained by Fourier-transform infrared (FTIR) analysis, showing an intensity increase of the absorption at a wave number…
Abstract The structure and morphology of a novel polyamide, nylon‐10,14, and its lamellar crystals from dilute solution were examined by transmission electron microscopy and wide‐angle X‐ray diffraction (WAXD). Both the electron‐diffraction pattern and WAXD data demonstrated that nylon‐10,14 adopts the structure of a…
The textural and structural characteristics and the acid properties of Ti-pillared montmorillonites prepared at bench scale (1 kg per batch level) have been compared with those prepared at laboratory scale (a few grams). The pillared clays have been examined by X-ray diffraction and characterized by different techniqu…
Abstract The miscibility of polysulfone (PSf) with various hydrophilic copolymers was explored. Among these blends, PSf gave homogeneous mixtures with poly(1‐vinylpyrrolidone‐ co ‐styrene) [P(VP–S)] copolymers when these copolymers contained 68–88 wt % 1‐vinylpyrrolidone (VP). Miscible PSf blends with P(VP–S) copolyme…
The formation of solid solutions in the CdTiO3–PbTiO3 system has been examined using x-ray diffraction (XRD) and differential scanning calorimetry. The XRD data showed two solid-solution ranges for the (Pb1−xCdx)TiO3 system at 1170 °C; orthorhombic on the cadmium-rich side and tetragonal on the lead-rich side, separat…
Polyelektrolyte mit kleinen hydrophoben Substituenten werden durch Vesikel aus Cyclodextrinmolekülen gebunden. Maßgeblich hierfür ist der Einschluss der hydrophoben Substituenten der Polymere in die Cyclodextrinhohlräume an der Vesikeloberfläche (siehe Bild). Die molekulare Erkennung ist das Ergebnis eines empfindlich…
Abstract The drawing behavior of ultrahigh molecular weight polyethylene fibers in supercritical carbon dioxide (scCO 2 ) is compared to that in air at different temperatures. The temperature substantially influences the drawing properties in air, whereas in scCO 2 , a constant draw stress and tensile strength are obs…
Primary nucleation of burkeite, which is a crystalline solid solution of sodium carbonate and sodium sulfate having the stoichiometry Na 2 CO 3 ·2Na 2 SO 4, was monitored using an on-line particle-size analyzer. Observations of unusual nucleation behavior led to explorations that identified specific impurities in the…
Abstract With thermally stimulated depolarization currents, we researched the relaxations of crosslinked polyethylene as it is used in medium‐voltage cable insulation. Through conventional polarization two heteropolar peaks stand up in the spectra, at 80 and 105 °C. As the sample is annealed, a homopolar peak is devel…
Exploring new channels: A range of alkali-metal copper silicates that contain double layers of silicate tetrahedra have been prepared, which contain straight 12-ring channels that are analogous to those found in LTL-type zeolites. The framework that defines the 12-ring channels is neutral and, consequently, only neutr…
A series of poly(ethylene oxide)/poly(butylene terephthalate) (PEO/PBT) segmented block copolymer films was treated with a radio-frequency carbon dioxide (CO(2)) or with argon (Ar) plasma. The effects of (preferential) etching on surface structure, topography, chemistry, and wettability were studied by scanning electr…
Electrochemical template synthesis of multilayer nanowires consisting of alternating ferromagnetic and nonmagnetic layers provides an approach to control the properties of magnetic particles in suspension. Copper/nickel multilayer nanowires were fabricated by electrochemical deposition from a solution containing both…
A single-electron inverter based on the Coulomb blockade effects has been fabricated in multiwalled carbon nanotubes, by using the Ar irradiation method for the tunnel barrier formation in the quantum dots. The device characteristics were measured at 2.6 K, and an indication of inverter-like transfer characteristics h…
We report on studies to determine the elementary diffusion jump of minority Sn atoms in the $\ensuremath{\gamma}$ phase of the intermetallic copper-tin alloy. The diffusionally accelerated decay from a crystalline ${\mathrm{Cu}}_{84}{\mathrm{Sn}}_{16}$ sample at elevated temperatures has been probed by quasielastic nu…
Field-cycling nuclear magnetic resonance relaxometry was used to study the spin-lattice relaxation dispersion of selected standard nematic liquid crystals at different temperatures, in presence and absence of a monochromatic ultrasonic field. It was found that sonication changes the relaxation dispersion and, in some…