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。
Submicron size spheres of silica and alumina prepared by well-known methods were coated sonochemically by nanoparticles of oxides of europium and terbium using the same concentration of ions. We have also used sonochemistry to prepare nanoparticles of silica and alumina doped by the same rare-earth ions for comparison…
An overview of the low-energy dislocation structure (LEDS) theory of low-temperature, that is non-creep, dislocation-based crystal plasticity is presented, as systematically developed over the past 35 years. It is ultimately based on G. I. Taylor's 1934 theory of work hardening wherein he assumed that stress applicati…
Composites consisting of polymer matrix materials and natural or synthetic layered minerals e.g. clays were prepared by using special compatibilizing agents between these two intrinsically non-miscible components. Block or graft copolymers combining one part of the polymer that is identically and/or completely miscibl…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Novel Mild Route to Nanocrystalline Selenides at Room TemperatureWenzhong Wang, Yan Geng, Ping Yan, Fuyu Liu, Yi Xie, and Yitai QianView Author Information Structure Research Laboratory and Department of Chemistry University of Science and Technology of China Hefei,…
Conformational changes on complex formation have been measured for 39 pairs of structures of complexed proteins and unbound equivalents, averaged over interface and non-interface regions and for individual residues. We evaluate their significance by comparison with the differences seen in 12 pairs of independently sol…
New lead structures for olefin oxidation catalysts have been obtained from a combinatorial library of 5760 metal–ligand complexes (see the microscopy picture). Iron complexes led to clean epoxide product formation using H2O2 as the terminal oxidant. Parallel libraries were used to determine ligand features important f…
MolScript is one of the most popular programs for the generation of publication-quality figures and the recent re-working of the program should ensure its continued popularity. However, some functionality of particular interest to crystallographers is not part of the standard program. A modified MolScript version 1.4…
This paper presents a methodology for the preparation of a-HgI2 by Physical Vapor Transport and of PbI2 crystals using the Bridgman technique. The results of the growth of HgI2 diluted in PbI2 by the Bridgman technique are shown for the first time, its limit of solubility having been determined at 600 ppm of HgI2 in t…
Boron-doped polycrystalline diamond films have been deposited over silicon substrate by hot-filament chemical-vapor-deposition process. A gas mixture of 0,5 vol. % methane and 1 vol. % methanol on hydrogen at a pressure of 50 Torr, have been used. Boric oxide dissolved in methanol have been used as the boron doping so…
The effect of the addition of small amounts of doped and undoped poly(o-methoxyaniline) (POMA) on the morphology of melt crystallized PVDF was investigated by means of polarized light optical microscopy. Undoped POMA (POMA-EB) inhibits nucleation and growth of non ringed spherulites, partially formed by the polar gpha…
Visible and Infrared Optical Absorption and Electron Paramagnetic Resonance (EPR) techniques have been used to characterize the intrinsic defects in sillenite type crystals: nominally pure Bi12TiO20 (BTO) and doped with vanadium (BTO:V). Optical quality crystals, with the composition Bi12.04±0.08Ti0.76±0.07V0.16±0.02O…
This work deals with electrorheological (ER) behaviour of moist crystalline cellulose dispersed in silicone oils of different viscosities (0.1, 0.35 and 1.0 Pa.s) in DC and 50 Hz AC electric fields. The experiments were performed on a parallel-plate viscometer with various width of the gap. In the AC field the intensi…
We have investigated the optical and the structural properties of strained In1-xGaxAsyP1-y/InP and strain compensated In1-xGaxAsyP1-y/In1-zGazAsqP1-q/InP multi-quantum well heterostructures grown by low-pressure metalorganic vapor phase epitaxy at different growth conditions. Our results indicate an increase of the co…
The paper is concerned with the rheological study of gels, complex materials which are characterised by an internal network structure developed in viscous liquids. This category of materials exhibits in viscometric motion a yield state at a critical value of the applied shear stress. The yield shear stress defines the…
The history of commercial viscometry and rheometry over the last thirty years is summarised. In terms of those instruments that have established themselves in a lasting position in the field, we highlight the importance of a sound original idea, good marketing, and constant improvement as technology advances. Instrume…