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。
Abstract This paper deals with the influence that the processing variables and the nature of the low‐molecular‐weight emulsifier used exert on the evolution of the droplet size distributions and linear viscoelasticity functions of concentrated oil‐in‐water emulsions during the emulsification process, and the way these…
The matrix isolation technique has been employed to isolate several intermediates, in sequence, in the oxidation of CH 3 OH by CrCl 2 O 2 . Consistent with previous theoretical calculations, a hydrogen-bonded complex formed initially after twin jet deposition and was enhanced by matrix annealing to 33 K. This complex…
Macromolecular complexes of Gd(III) chelates are widely investigated as MRI contrast agents. In addition to the potential increase in relaxivity, they have a further advantage over the Gd(III) chelates of an extended lifetime in the blood pool, which is necessary for magnetic resonance angiography applications. When d…
The heterogeneous reactions of HOBr with solid crystalline NaCl [HOBr(g) + NaCl(s) → BrCl(g) + NaOH(s)] and KBr [HOBr(g) + KBr(s) → Br 2 (g) + KOH(s)] substrates at ambient temperature have been investigated using a Teflon coated Knudsen cell reactor. Powder, grain, and spray-deposited salt substrates were used for th…
In this article, we report the investigation of sputtered magnesium as a suitable photoelectron emitter in a rf injector. The measurements were conducted on a 20 μm thick Mg layer, ion sputtered on a copper substrate. UV laser induced damage threshold measurements on this sample indicate that laser energy densities of…
The present work is the first report of the use of surface-enhanced Raman scattering (SERS) for two-dimensionally spatially resolved, chemically selective monitoring of the course of a surface-catalyzed photoreaction. We have recently developed the surface-enhanced Raman imaging (SERI) technique, which is chemically s…
Abstract Photoswitching of the enzymatic activity of ribonuclease S′ was successfully carried out by site specific incorporation of phenylazophenylalanine into S-peptide skeleton by semisynthesis.
The optical properties of GeTe and Ge 2 Sb 2 Te 5 have been studied by means of the density functional theory (DFT) in the local density approximation (LDA). The electronic band structures were obtained by two methods, the plane wave (PW) and spherical wave (SW) expansions of the wave functions. GeTe was calculated to…
The title compound consists of two-dimensional layers of [Au(CN) 2 ] - complexes alternating with layers of Eu 3+ ions. Due to this structure type, the lowest electronic transitions of the dicyanoaurates(I) exhibit an extreme red shift of Δν̄ max /Δ p = −130 ± 10 cm - 1 /kbar under high-pressure application at least u…
We report on the synthesis of Ti-containing diamondlike hydrocarbon (Ti-DLC) coatings by plasma-assisted physical vapor deposition and the characterization of coating microstructure and mechanical properties. We find that Ti-DLC coatings with Ti compositions higher than 5.5 at. % are composites consisting of nanocryst…
The theory of dislocation-induced X-ray or neutron diffraction line broadening developed by Krivoglaz et al. and Wilkens has been adapted for Rietveld refinement of the powder diffraction profile by fitting a Voigt function to each peak. Information on both the type of slip system and the density of dislocations in th…
A shock compaction technique has been successfully applied for the consolidation of hard magnetic powders without appreciable changes in the phase structure and grain size. Pr–Fe–B and Sm–Fe–N materials, prepared with the application of melt spinning and mechanical alloying, respectively, were shock compacted with a s…
Phosphors have been used for the display of information since the invention of the cathode-ray tube (CRT) by Karl Ferdinand Braun in 1897. With the development of color television, an effort spanning approximately 30 years, came the most significant advances in phosphor technology. The most noteworthy was the shift to…
We examined the aluminium solubility in the upper B horizon of podzols and its relation to the solid phase of the soil in 60 samples covering a pH range from 3.8 to 5.1. Solid phases were characterized by extractions with acid oxalate and pyrophosphate (pH 10). The solubility of Al was studied in a batch experiment in…
Five polystyrene−poly(dimethylsiloxane) di- and triblock copolymers were prepared by two different methods, a classical anionic polymerization and a cationic polymerization of styrene in the presence of a new macromolecular initiator. Spherical, cylindrical, and lamellar phase-separated morphologies were identified. T…
The photocorrosion behavior of CdS nanoparticle colloid containing particles ranging from 4 to 10 nm was investi-gated using two kinds of monochromatic light, one of which was prepared by passing light from a Xe lamp through inter-ference filters, and the other was obtained by an Ar ion laser. CdS particles were photo…
Microbially influenced corrosion (MIC) is catalysed by a series of metabolic activities of selected micro‐organisms, notably by oxidation of cathodic hydrogen by hydrogenase, by hydrogen sulphide and by reduction of ferric iron. The sulphate‐reducing bacteria are considered to be the most common catalyst of MIC, where…
Abstract The reaction of CoX2(X=Br, Cl) and pyrimidine (PM) in H2O gave crystals of CoPM2X2. The crystal structure analysis revealed a chiral three-dimensional network of the Co(II) ions. Weak ferromagnetism with relatively large spontaneous magnetization was observed below 5 K for both compounds.
Oxovanadium phosphates constitute a crystallochemically very rich family that, in turn, results in a seemingly intricate magnetochemistry including from isolated dimers to 3-D systems. This magnetic diversity is due, in part, to the possible participation of phosphate groups in the spin transfer between V IV centers.…
Nanostructured NdFeB films were prepared by magnetron sputtering followed by rapid thermal annealing at a ramp rate of 200 °C/s. Isotropically oriented Nd2Fe14B crystallites were formed in the films and coercivities up to 20 kOe and remanence ratios up to 0.8 were obtained. Transmission electron microscopy analysis sh…