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 Hydrothermal reactions between aqueous Na2MoO4, Na2ESO3 (E = S, Se) and hydrazine monohydrate at 135 °C for 12 h produce phase-pure MoS2 and MoSe2 with good yield of about 90%. X-Ray powder diffraction, chemical analysis and X-ray photoelectron spectroscopy were used to characterize the structure and composit…
Scoured silk fibre was dissolved in a solution of calcium chloride in water and ethanol. After dialysis against purified water, theophylline as model drug was added to the solution. Silk microspheres prepared after spray-drying were round but somewhat wrinkled; their diameter was 5 μm (approx.). According to powder X-…
We have fabricated oriented copper-phthalocyanine (CuPc) films by vacuum deposition on rubbed polyimide (PI) alignment layers. It was found that the b -axis of α-type CuPc microcrystals changes its direction depending on the thickness of PI layers, namely, the b -axis is perpendicular to the rubbing direction on a thi…
The epitaxial Bain path (EBP) of antiferromagnetic (AF) tetragonal Mn has been found by first-principles total-energy calculations using the full-potential linearized-augmented-plane-wave (FLAPW) method with two different potentials: (1) the local-spin-density-approximation without relativistic corrections (LSDA-NREL)…
Abstract The focused ion beam(FIB) technique, developed for the microelectronics industry has become a major method for site specific transmission electron microscopy(TEM) specimen preparation in a wide range of materials[l]. The FIB lift-out technique has improved the specimen preparation procedures by removing compl…
Abstract Crystals of Hg 2 (H 2 AsO 4 )2 , which are isotypic with the corresponding dihydrogenphosphate Hg 2 (H 2 PO 4 ) 2 , were obtained from a concentrated arsenic acid solution. The crystal structure (P2 1 /n, a = 6.1838(4), b = 15.0987(9), c = 4.7989(3) Å, β = 91.977(1)°, Z = 2, R = 0.045 for 1318 structure facto…
There are plans at ASDEX Upgrade to cover the heat shield of the inner main chamber wall with tungsten coated graphite tiles. Four tiles were installed at different poloidal positions of the heat shield and removed after a full experimental campaign. The tiles were analysed by means of Rutherford backscattering (RBS)…
We report the results of a high-resolution synchrotron X-ray powder diffraction study of polymerised CsC 60 in the temperature range 4 to 40 K. Its crystal structure is monoclinic (space group I 2/ m ), isostructural with RbC 60 . Below 14 K, a spontaneous thermal contraction is observed along both the polymer chain a…
The reaction of zinc tetrakis(3-pyridyloxy)phthalocyanine (1) with NH 4 [ PtNH 3 Cl 3 ] leads to zinc tetrakis(cis-[3-oxypyridyl]-N]amminedichloroplatinum(II))phthalocyanine (2), while the reaction of 1 with cis- Pt ( DMSO ) 2 Cl 2 or 2 with DMSO forms zinc tetrakis(cis-[(3-oxypyridyl)-N]dichloro[sulfinylbis(methane)-…
Although it is widely known to textile scientists that when yarn twist exceeds the optimal level, yam strength will decline due to the so-called obliquity effect, the exact physical mechanism behind this obliquity effect is still unknown. It is therefore our objective to investigate this issue. We adopt a special tech…
Abstract Several species of freshwater green algae belonging to the order Zygnematales (Spirogyra crassa (Ktz.) Czurda, S. longata (Vauch.) Ktz., and Mougeotia viridis (Ktz.) Wittr.) were found to have a specific composition of the volatile fraction, which confirms an earlier proposal for the existence of two groups i…
Luminescent Si nanocrystals formed in SiO 2 layers were irradiated with electrons and He + ions with energies of 400 and 25–130 keV, respectively. The effects of irradiation and subsequent annealing at 600–1000°C were studied by the methods of photoluminescence and electron microscopy. After irradiation with low doses…
Molecular dynamics simulations of alumina containing silicate glasses have been performed in order to determine the influence of that ion on the final properties of the glasses. In particular, short- and mid-range structures were analyzed in terms of the distribution of non bridging oxygen, bridging oxygen, three brid…
Thermoplastic copolyimide synthesised from 3,3′, 4,4′-benzophenonetetracarboxylic dianhydride, 4,4′-oxydianiline, and 1,3-phenylenediamine were success fully coated onto carbon fibres by electrochemical deposition and subsequently impregnated with polymerisable reaction mixtures of PMR-15 thermosetting polyimide. Carb…
Molecular assemblies of meso-pyridylporphyrins and zinc(II) 1,8,15,22-tetrakis(3-pentyloxy)phthalocyanine held through axial coordination are reported. Their formation has been revealed by 1H NMR spectroscopy and photophysical measurements.
The possibility of using CVD diamond films as dosimeters in radiotherapy applications has been tested in both off-line and on-line configurations. The thermoluminescent and thermally stimulated current responses after 20 MeV electron and 22 MeV proton irradiation have been studied as a function of the dose up to 10 Gy…
Temperature dependence of the deformation behavior of Mg-alloy single crystals containing 0.5 at.%Dy or Zn is investigated by compression tests at various test temperatures ranging from 77 K to 473 K. The basal slip operates and the CRSS increases with decreasing temperature at the temperature range lower than room te…
Direct-template synthesis and purification of a new phase of the triple-decker bismuth(III) phthalocyanine Bi2(Pc)3, prepared from bismuth acetate and phthalonitrile, are described. X-ray analysis shows a triple-decker molecular structure involving three phthalocyanine rings and two bismuth atoms that are 3.838(9) Å a…
Discrete and monodisperse submicron crystals of silicalite-1 with a mean size of 0.3 μ m were synthesized from clear crystallization solutions. The effects of silica content, alkalinity of batch and the nature of silica source on the product yield, crystal morphology and particle size distribution were investigated. T…
The freshwater zones of the Warri/Forcados Estuaries contain a rich and diverse flora of tropical desmids, which compare favourably and show strong affinities with desmids from other parts of Africa, tropical South America, Southeast Asia, tropical Australia and the Indian sub-continent. In this study, ninety (90) tax…