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。
We present an improved quantitative mobility spectrum analysis (i-QMSA) procedure for determining free electron and hole densities and mobilities from magnetic-field-dependent Hall and resistivity measurements on bulk or layered semiconductor samples. The i-QMSA technique is based on a fundamentally new approach, whic…
Kinetic analyses for the solid‐state reactions of reactant particles in an assemblage with a particle‐size distribution (PSD) have been reexamined for the reactions that proceed by the advance of the reaction interfaces inward toward the center of the individual reactant particles. The experimental kinetic curves for…
At embryo implantation, it is postulated that the initial contact between blastocyst and maternal tissues is by adhesion of the trophoblast to the uterine epithelium. This cell-to-cell interaction is thought to be critical for implantation, although the actual adhesive forces have never been determined. In the present…
The unique structure and reactivity of cellulose opens up various possibilities for the design of advanced materials based on this biomacromolecule. In the present feature the state of the art of selected cellulose functionalization reactions is discussed adequately considering own research results. In particular, new…
Available data suggest that drugs should be delivered to a vascular lesion at a high concentration over an extended period of time to control vascular smooth muscle cell (VSMC) proliferation. This study was undertaken to formulate a paclitaxel, an antimicrotubule agent, into a biodegradable poly (ethylene oxide)-poly(…
Experimental results for a carbonated, high-CaO evolved nephelinite at 0.2 and 0.5 GPa at 900–1040°C are presented. Immiscible carbonate and silicate liquids are in equilibrium with a variety of crystal phases (clinopyroxene, nepheline, melilite, wollastonite, perovskite, melanite garnet, titanite, Fe-rich spinel, apa…
The deformations of a face-centered cubic polycrystal are simulated under idealized (plane strain compression) rolling conditions. A polycrystal is constructed using 1099 rhombic dodecahedron shaped crystals, each discretized with 48 tetrahedra elements. The rhombic dodecahedron is a 12-sided, space-filling polyhedron…
The ruthenium-substituted “sandwich” type polyoxometalate [WZnRu III 2 (XW 9 O 34 ) 2 ] 11 - where X = Zn II or Co II has been shown to be unique in its ability to catalyze the selective hydroxylation of adamantane at the tertiary carbon position with molecular oxygen as the oxygen donor. The hydroxylation features an…
The use of deuteration in concert with uniform 15 N, 13 C-labeling has been critical for the chemical shift assignment of several proteins and protein complexes over 30 kDa. Unfortunately, deuteration reduces the number of interproton distance restraints available for structure determination, compromising the precisio…
(001)-oriented heterostructures consisting of LaAlO3 substrates, SrRuO3 bottom electrodes, and Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN-PT) (70/30) films were deposited by pulsed laser deposition from Pb-enriched ceramic targets. The epitaxial growth of all layers was confirmed by four-circle x-ray diffraction. Film growth was ca…
In this article we report experimental results on the deformation and the critical breakup conditions of a single drop in a medium under simple shear flow. The role played by both drop and matrix elasticities is quantified by using constant viscosity elastic (Boger) fluids. The experiments were conducted using two tra…
The “3 + 1” route for porphyrinoid synthesis is an excellent methodology for preparing aromatic porphyrin analogues with six-membered ring subunits. Condensation of 5-formylsalicylaldehyde with tripyrranes 15, 24, and 25 in the presence of 5% TFA-dichloromethane, followed by neutralization and oxidation with DDQ, affo…
Spin fluctuation-induced superconductivity in two-dimensional organic compounds such as \kappa-(ET)_2-X is investigated by using a simplified dimer Hubbard model with right-angled isosceles triangular lattice (transfer matrices -\tau, -\tau^\prime). The dynamical susceptiblity and the self-energy are calculated self-c…
An in-situ hot pressing/solid-liquid reaction process was developed for the synthesis of dense polycrystalline Ti3SiC2 ceramics using Ti, Si, and graphite powders as starting materials. The present work demonstrated that this process was one of the most effective and simple methods for the preparation of dense bulk Ti…
The mechanism of luminance decrease in blue emitting phosphor after annealing has been studied. It was shown experimentally that annealing in air oxidizes and substantially changes the ion to an ion. This is also deactivates the luminescent center, thus decreasing emission. Furthermore, the compound , in which the val…
We report molecular-dynamics simulations of plastic deformation of Ni nanophase samples with different grain structures, temperature, and applied stress. We analyze the mechanical and thermal activation of the elementary process contributing to plastic deformation at the grain boundaries and provide a quantitative int…
Pore size engineering of silicates has always been a critical issue in the field of mesoporous materials design. A new method for obtaining silicates with pore sizes up to 11 nm and narrow pore size distributions is described by the authors. Treating non-calcined MCM-41 silicate in aqueous emulsions of long-chain alky…
Using broad-band dielectric spectroscopy (10−2–109 Hz) the merging of the α- and β-relaxations has been investigated for a polymer, syndiotactic poly(methyl methacrylate) (PMMA), in which the dielectric losses are dominated by a strong β-relaxation. The asymmetrically shaped β-relaxation cannot be described by a Cole–…
We study the electronic states of the anisotropic triangular lattice Hubbard model at half filling, which is a simple effective model for the organic superconducting $\kappa$-BEDT-TTF compounds. We treat the effect of the Coulomb interaction by the fluctuation exchange (FLEX) method, and obtain the phase diagram of th…
High-resolution calorimetric studies have been made of the liquid crystal phase transitions for several dispersions of 70-\AA{}-diam silica spheres (aerosil) in octylcyanobiphenyl (8CB) as a function of silica density ${\ensuremath{\rho}}_{S}.$ The excess specific heat peaks associated with the nematic-isotropic $(N\e…