Materials Literature
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Abstract Summary: A mechanical model was developed to describe qualitatively and quantitatively the stress‐strain‐time behavior of a prepared shape memory crosslinked polyethylene during hot stretching, stress relaxation under 200% strain at high temperature and strain recovery of the heat shrinkable polymer. The stre…
Three new carbazole-containing polymers were synthesized through Suzuki cross-coupling between N -octylcarbazole-3,6-bis(ethyleneboronate) (NOctCz(BO 2 Et) 2 ) and several arylene dibromides. 2,5-Dibromothiophene (DBT), 2,2‘-dibromo-5,5‘-bithiophene (DBBT), and 4,7-dibromo-2,1,3-benzothiadiazole (DBBTD) gave the three…
We apply the formulation developed in a recent paper [Y. Ohashi and A. Griffin, Phys. Rev. A {\bf 72}, 013601, (2005)] for single-particle excitations in the BCS-BEC crossover to the case of a broad Feshbach resonance. At T=0, we solve the Bogoliubov-de Gennes coupled equations taking into account a Bose condensate of…
The effect of substrate orientation on the morphologies of epitaxial self-assembled nanostructures was demonstrated using multiferroic 0.67PbTiO3-0.33CoFe2O4 thin films. The two-phase composite films were grown by pulsed laser deposition on single crystal SrTiO3 substrates having (001) and (110) orientations. The nano…
A multiscale approach for fluid flow is developed that retains an atomistic description in key regions. The method is applied to a classic problem where all scales contribute: The force on a moving wall bounding a fluid-filled cavity. Continuum equations predict an infinite force due to stress singularities. Following…
We consider the electronic structure of, and magnetic exchange (spin) interactions between, nominally nonmagnetic Eu^3+ ions (4f^6, S=3, L=3, J=0) within the context of the rocksalt structure compounds EuN and EuP. Both compounds are ionic [Eu^3+; N^3- and P^3-] semimetals similar to isovalent GdN. Treating the spin p…
The spin-dependent recombination (SDR) has been observed in GaAs_{1-x}N_{x} (x = 2.1, 2.7, 3.4%) at room temperature. It reveals itself in a decrease of the edge photoluminescence (PL) intensity by more than a factor of 3 when either the polarization of the exciting light is changed from circular to linear or the tran…
Electrospun polymer nanofibres were originally developed for their durability and resistance to all forms of degradation and biodegradation. Some polymer nanofibres are biocompatible and biodegradable and therefore suitable for replacement of structurally or physiologically deficient tissues and organs in humans. Here…
In this paper we present the results of a high-temperature $(300\phantom{\rule{0.3em}{0ex}}\mathrm{K}\ensuremath{\leqslant}T\ensuremath{\leqslant}800\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ neutron powder diffraction study of the ${\mathrm{La}}_{1.4}{\mathrm{Sr}}_{1.6}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ bilayered mangan…
Experimental observations and theoretical treatments are carried out for the band shape and relative intensity of the emission from gold nanorods of various aspect ratios in the range between 2.25 (1.5 theory) and 6.0 (9 theory). The calculation of the fluorescence spectra requires knowledge of the nanorod size distri…
A representative poly(beta-amino ester) (PbAE) with biodegradable and pH-sensitive properties was used to formulate a nanoparticle-based dosage form for tumor-targeted paclitaxel delivery. The polymer undergoes rapid dissolution when the pH of the medium is less than 6.5 and hence is expected to release its contents a…
The giant and supergiant electrical capacity are discovered in the heterostructures on a basis of advanced superionic conductors.
In an earlier paper, W. Kohn had qualitatively introduced the concept of "nearsightedness" of electrons in many-atom systems. It can be viewed as underlying such important ideas as Pauling's "chemical bond," "transferability" and Yang's computational principle of "divide and conquer." It describes the fact that, for f…
A stacked plate model for the vibration of multi-layered graphene sheets (MLGSs), in which the van der Waals (vdW) interaction between layers is described by an explicit formula, is presented. Explicit formulae are derived for predicting the natural frequencies of double- and triple-layered graphene sheets, and they c…
Abstract For Abstract see ChemInform Abstract in Full Text.
The effect of grain boundary structure, either rough or faceted, on diffusion‐induced grain boundary migration (DIGM) has been investigated in BaTiO 3 . SrTiO 3 particles were scattered on the polished surfaces of two kinds of BaTiO 3 samples with faceted and rough boundaries and annealed in air for the samples with f…
Abstract Hot filament chemically vapor deposited (HFCVD) boron doped diamond films were grown on monocrystalline silicon (111) doped with B/C ratios of 4000, 8000 and 12,000 ppm. Scanning electron micrographs show that the films are composed of well‐faceted microcrystallites ranging in size from about 1 to 5 µm with n…
The leaching behavior of Na from soda–lime–silicate glass was investigated by preparing glass powders with average particle diameters of 53 and 19 μm, and leaching in HNO 3 at 90°−140°C. A new theoretical equation for Na leaching from a spherical particle is proposed based on the assumption that a rate‐determining pro…
Abstract N -Methylene(morpholinium) ions (carbenium-iminium ions) are responsible for uncontrollable reactions of Lyocell dopes – solutions of cellulose in N -methylmorpholine- N -oxide monohydrate at process temperatures of approximately 100°C – as they are able to induce autocatalytic decomposition of the solvent. T…
Abstract Ribbon and rod sapphire pulling has been performed in three different crystal growth equipments in order to study the effect of the installation, of the atmosphere, of the die shape, of the feed material and of the pulling rate on the distribution, number and diameter of the characteristic voids (micro‐bubble…