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 luminescence properties of Ce3+,Na+-codoped MSi2O2−δN2+2/3δ (M = Ca, Sr, Ba) are reported. The undoped and Ce3+,Na+-codoped MSi2O2−δN2+2/3δ powders were prepared by a solid-state reaction at temperatures between 1300–1400 °C under N2–H2 (10%) atmosphere in the system MO–SiO2–Si3N4 (M = Ca, Sr, Ba). MSi2O2−δN2+2/3δ…
Self-assembly of aqueous solutions of molybdate and vanadate under reducing, mildly acidic conditions results in a polyoxomolybdate-based {Mo72V30} cluster compound Na8K16(VO)(H2O)5[K10 subset{(Mo)Mo5O21(H2O)3(SO4)}12(VO)30(H2O)20].150H2O, 1, a quantum spin-based Keplerate structure.
Left-handed materials (LHM) are engineered structures that exhibit electromagnetic properties not found in nature. Real applications of LHM need substrates with low loss, wide bandwidth as well as stable mechanical characteristics. In this paper, we summarize some experimental as well as numerical results of lefthande…
Three novel dendritic europium complexes containing grafted carbazole units as their functional peripheries were prepared and characterized. The Förster energy transfer from the peripheries of carbazole units to β-diketonates as well as from the ligands to the central Eu(III) ions in these complexes has been demonstra…
Two series of pyrazolato bridged dinuclear NCS and NCBH3 diiron(II) complexes with various types of 3- or 4-substituted pyridines, [{Fe(NCS or NCBH3)(X-py)}2(mu-bpypz)2], were prepared and their variable-temperature magnetic susceptibilities were measured. There were found linear correlations of the spin-crossover tem…
Complex capacitance analysis was done on the porous carbon electrode–electrolyte interface, where a minor leakage current is involved in addition to the dominant capacitor charging current. Based on the transmission line model, imaginary capacitance profiles ( vs. ) were theoretically derived for a cylindrical pore an…
Grain refinement of a magnesium alloy, AZ31, was studied in multi-directional forging (MDF) with decreasing temperature from 623 to 423 K. The MDF was carried out up to cumulative strains of around 5 with changing the loading direction during decreasing temperature from pass to pass. The structural changes are charact…
Quantitative determination of platinum oxidation state on supported platinum catalyst was examined by using Pt L III -edge XANES spectra. The nano-sized platinum particles on the support were partially oxidized under oxidative atmosphere. The atomic ratio of oxygen to platinum (O/Pt) for these particles could be deter…
The application of wire grid polarizers as efficient polarizing beam splitters for visible light is studied. The large differences between the transmissivity for different polarizations are explained qualitatively by using the theory of metallic wave guides. The results of rigorous calculations obtained by using the f…
Rhabdophane-type hexagonal lanthanide orthophosphate, LnPO4·nH2O (Ln = La, Ce, Nd, Sm, Eu, Gd and Tb, n = 0 to 0.6), and body-centered tetragonal ErPO4·nH2O nanowires/nanorods have been successfully synthesized in high yield (>95%) by simple microwave heating of an aqueous solution of Ln(III) nitrate and NH4H2PO4 in t…
White-light emission is generated by combining blue and blue green to yellow emissions of Ce 3 + and Eu 2 + , respectively, in a single host lattice of Sr 2 Si O 4 . The excitation is in the near-UV region ( 350 – 370 nm ) . The role of concentration of Eu 2 + on the photoluminescence emission intensity in Sr 2 ‐ x Eu…
Novel calcium phosphate materials were synthesized from solutions containing the surfactant bis(2-ethylhexyl)sulfosuccinate sodium salt (AOT), water and oil. A range of morphologies was obtained by varying the relative concentrations of the solution components. A material with structural features resembling tooth enam…
Non-oxidic salts such as NaCl, CaF2, SrF2 and BaF2 were synthesised using a flame spray method; optional doping of such fluorides with rare earth elements suggests possible applications in optics.
We describe a new technique based on latex technology, which allows the production of conductive composites with potential applications in electronics. These composites consist of exfoliated single-wall nanotubes in a polymer matrix of choice, with very low percolation threshold.
Multifunctional core-shell microspheres consisting of a polystyrene 640 nm diameter core covered with a selectable number of layers of magnetite (12 nm) and silica-coated gold (15 nm) nanoparticles have been fabricated using the layer-by-layer (LbL) technique in aqueous solution. By varying the shell thickness and lay…
This paper presents a review of the ST and SFE values expressed in dyn/cm for a number of polymers, minerals, oxides and clays. The review also deals with the calculation of ST based on parachor values and other polymer properties obtained from a DIPPR database accompanied and coupled with QSPR software entitled TSAR.…
The mechanical and gas-barrier properties of paper and paperboard coated with chitosan–acetic acid salt (chitosan), whey protein isolate, whey protein concentrate and wheat gluten protein were studied. Paper sheets were solution-coated using a hand applicator. In addition, bi-layer composites of wheat gluten and paper…
Current study presents one of effective techniques to improve mechanical properties of PLA (Poly-Lactic Acid)-based bamboo fiber composite. Commercially available Micro-Fibrillated Cellulose (MFC) obtained from wood pulp was applied as an enhancer to the composite. The bamboo fibers were extracted by steam explosion m…
Several oxy-apatite materials La10−xSrx(TO4)6O3−0.5x (T = Ge, Si; 10−x = 9.00, 8.80, 8.65 and 8.00) and La9.33(Si1−xGexO4)6O2 (x = 0, 0.5, 0.67) have been prepared as highly crystalline phases. The impedance study showed that all samples are oxide ion conductors. However, bulk conductivities changed by more than 2 ord…
Polystyrene microbeads doped with highly luminescent CdS quantum dots (QDs) have been prepared. Polystyrene particles with diameters ranging from 100 nm to 500 µm were prepared by a suspension polymerization method and with different loadings of QDs. The resulting organic–inorganic microspheres have been characterized…