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 problem of calculating the local compressive strength of normal‐weight concrete elements of building and engineering structures locally loaded by rigid steel plates on a small area surrounded from all sides by a non‐loaded larger area of cross‐section is presented in this paper. The results of experimental and the…
Red single crystals of disilver(I) dimercury(II) tris[tetraoxotellurate(VI)], Ag2Hg2(TeO4)3, were obtained under hydrothermal conditions at 523 K. The structure is built up of infinity1[(TeO2/1O4/2)({TeO2/1O2/2}2O4/2)] chains, with an overall composition [TeO4]2-, that run parallel to the crystallographic a axis. Dist…
The topic of antireflection coatings is vast, and it is impossible to review it comprehensively in an article of this size. Here an attempt is made to show how antireflection coatings evolved from inhomogeneous layers, through homogeneous layers with optical thicknesses that were multiples of a quarter wave of some ce…
The bias-field-dependent dielectricity of ferroelectric thin films is studied by use of a multilayer model capable of modeling saturated and unsaturated hysteresis behavior under arbitrary fields. The simulated minor hysteresis loops at different bias fields are used to calculate the variation of dielectric permittivi…
A dynamic analysis is given of the wave propagation in a polycrystalline shape memory alloy semi-infinite rod subject to an impulsive load described by a rectangular loading function. This is a continuation of the previous study for which the impact load is described by a step loading function, and for which the rod u…
4-Ferrocenylazophenol (FAP) and 8-(4-ferrocenylazophenoxy)octanyl-1-bromide (FAOB) have been synthesized and their protonation and photochemical behavior have been investigated. FAP showed reversible protonation and deprotonation behavior in the presence of trifluoroacetic acid and potassium tert-butylate, respectivel…
Abstract The mean square amplitudes of vibration, Debye–Waller factors and Debye temperatures of bismuth (Bi), antimony (Sb) and Bi 1– x –Sb x alloys have been obtained from X‐ray intensities. The intensities have been measured with Philips 3020 diffractometer fitted with a proportional counter using filtered CuK α ra…
Quantum chemical calculations show that metal-hydride molecules are more compact when they are placed inside a fullerene cage than when they are isolated molecules. The metal-hydrogen bond distance in ZrH4 becomes 0.15 Å shorter when it is placed inside a C60 cage. Metal-polyhydride molecules with a large number of H…
The persistent utilization of optical lithography at the DUV and VUV excimer laser wavelengths leads to extraordinary demands on the optical components involved (high throughput, low scattering, high mechanical stability, ...). Fluorides are the main or even the only candidates for film materials in these spectral reg…
Dielectric measurements were carried out on undiluted poly(butylene oxide) (PBO) with various molecular weights. The dielectric normal mode relaxation due to fluctuation of the end-to-end vector and the segmental relaxation due to local motions were observed. The relaxation time τ n for the normal mode and τ s for the…
Optimization of hydrocarbon (HC) oxidation over a diesel oxidation catalyst (DOC) requires consideration of (i) HC gas diffusion into the catalyst layer, (ii) HC gas adsorption and desorption from catalyst sites, and (iii) kinetics of the oxidation reaction. We have already reported a brief modeling study that emphasi…
We have developed a one-step, hydrofluoric acid-free hydrothermal etching method that not only produces bismuth nano/micrometer-sized spheres but also prepares porous silicon with vertical holes. By controlling the heating temperature and time, nanoscale vertical-channeled porous silicon can be received. Our result in…
Abstract Based on hyperbranched polyglycerol (PG), a route to prepare particles with a novel topology was developed. The hydroxyls of PG were converted to trithiocarbonates, and the latter were used to mediate the surface graft polymerization of N,N ‐dimethylaminoethyl acrylate. The poly( N,N ‐dimethylaminoethyl acryl…
The thermal conductivity of yttria-stabilized zirconias has been determined numerically, by applying a nonequilibrium molecular dynamic calculation. Comparing random configurations and Monte Carlo configurations in which chemical correlations are taken into account, we have established that the short range order devel…
A half-metal has been defined as a material with propagating electron states at the Fermi energy only for one of the spin directions. But is it fully half-metallic, that is without electrons with opposite spin at that energy? We have studied the spin-conserving process of tunnelling between La 0.7 Sr 0.3 MnO 3 half-me…
We investigated a carbon nanotube (CNT) oscillator controlled by thermal gas expansion using classical molecular dynamics simulations. When the temperature rapidly increased, the force on the CNT oscillator induced by the thermal gas expansion rapidly increased and pushed out the CNT oscillator. As the CNT oscillator…
Anionic pentapeptides consisting of a string of four glutamic acid residues terminated by either tyrosine (Glu4Tyr) or tryptophan (Glu4Trp) were synthesized, and their aggregation properties in buffered (pH = 7.0) aqueous solutions were investigated using two different approaches. In the first approach, the effects of…
Abstract A positive‐working chemically amplified photosensitive polyimide (PSPI) developable with basic aqueous solutions was obtained from poly(amic acid ethoxymethylester) (PAAE) as a polyimide precursor and diphenyliodonium 5‐hydroxynaphthalene‐1‐sulfonate (DINS) as a photoacid generator. The norbornene‐end‐capped…
The catalytic core of Escherichia coli DNA polymerase III holoenzyme contains three subunits: alpha, epsilon, and theta. The alpha subunit contains the polymerase, and the epsilon subunit contains the exonucleolytic proofreading function. The small (8-kDa) theta subunit binds only to epsilon. Its function is not well…
The crystal structure of the title compound, disodium 1,2,3,4-tetraoxo-5-cyclohexene-5,6-diolate, 2Na+·C6O62−, is built up of alternating layers of hexagonally packed Na+ cations and rhodizonate dianions. The rhodizonate dianion has a slightly twisted conformation.