Materials Literature
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The luminescence enhancement effect of different kinds and contents of rare earth complexe (RE(DBM)3Phen, RE = Dy, La, Gd, Sm, Y; DBM = dibenzoylmethane; Phen = 1,10-phenanthroline) sensitized Eu(DBM)3Phen doped in poly(methyl methacrylate) (PMMA) matrix was investigated using the combinatorial method. The efficiency…
Laser-ablated Ca, Sr, and Ba atoms were co-deposited with H 2 in excess argon, neon, and hydrogen to form alkaline-earth metal hydrides. The metal dihydrides (CaH 2, SrH 2, and BaH 2 ) were identified in solid argon, neon, and hydrogen. Increasing infrared intensity in the symmetric stretching mode and electronic stru…
The effects of poly[methylene (polyphenyl isocyanate)] (PMPPIC) and maleated polypropylene (MAPP) coupling agents, separately and combined, on the strength and Young’s modulus of New Zealand radiata pine-reinforced polypropylene (PP) composites were assessed. A modest improvement compared to the unreinforced matrix st…
Abstract Recently released powder indexing programs are reviewed and placed in competition with the established programs (ITO, TREOR, DICVOL, etc.) through a series of problems selected among previously unindexed ICDD entries designated as “high quality”. Benchmarks are provided for testing indexing programs, based on…
The synthesis and relaxometric properties of hetero-tripodal hydroxypyridonate-terephthalamide gadolinium (Gd(3+)) chelates with differing structural features for probing human serum albumin (HSA) interactions are reported. The Gd(3+) complexes are divided into two series. The first series (3-5) features a benzyl deri…
The rate of corrosion of X65 carbon steel in oilfield brines containing carbon dioxide (CO2) is increased by the presence of acetate (or anions of other weak acids) in the brine. It is confirmed that the increase in corrosion rate may be correlated with the equilibrium concentration of acetic acid (HOAc) in the brine…
We investigated nitrite and nitrate ion formation during single-bubble cavitation by realizing stable light emission for more than 30 h. Production yields of nitrite and nitrate ions in water were obtained as a function of irradiation time. The concentrations of nitrate and nitrite ions increased linearly with irradia…
The phase constitution and the microstructure of NiFe2O4 powders prepared by a sol-gel autocombustion route have been studied in this research. Amorphous gels, as-burnt powders with a varying Fe/Ni ratio and calcined powders at temperatures between 600–1000 °C for 1h, were investigated by using DTA/TG, XRD and SEM tec…
Ni(1-x)Zn(x)Fe2O4 (0≤x≤1) mixed ferrite nanoparticles encapsulated with amorphous-SiO2 were prepared by a wet chemical method. The diameters of these particles were estimated from X-ray diffraction patterns as ranging from 2 to 6 nm. Magnetization measurements were performed for each obtained sample under a ±50 kOe fi…
The Gd2(WO4)3:RE3+ compounds (where RE3+ = Sm and Tb) were prepared by the Pechini and ceramic methods and characterized by X-ray diffraction and infrared spectroscopy. These rare earth materials present high orange (Sm3+-compound) and green (Tb3+-compound) luminescence intensity under UV radiation. The excitation spe…
The fabrication of ultra‐water‐repellent poly(ethylene terephthalate) substrates has been achieved by a two‐step plasma process. First, appropriate nanotextures are prepared on the substrate through an oxygen plasma treatment, and then a hydrophobic layer is coated on the nanotextured surfaces with plasma‐enhanced CVD…
This work reports a theoretical-experimental investigation of the infrared/Raman vibrational spectra of several metal 1,3-dithole-2-thione-4,5-dithiolate (dmit) complexes; [NEt4]2[Zn(dmit)2], [NEt4][Sb(dmit)2] and [NEt4][Bi(dmit)2]. IR/Raman spectra of all the solids and the solution IR spectrum of [NEt4]2[Zn(dmit)2]…
A partir da definição de células a combustível, é feita uma introdução sucinta dos tipos de células e dos materiais cerâmicos que são empregados em projeto e fabricação destes dispositivos geradores de energia elétrica. Tomando por base a ampla literatura científica disponível em publicações periódicas internacionais…
Novel liquid crystals based on fluorinated carbon chains and terminated with SF 5 groups are presented for the first time. Attachment of an SF 5 group separated from a benzylidine group by a fluorinated spacer leads to monotropic nematic and smectic phases, while an enantiotropic nematic phase is observed in mixtures.…
Although it is known that growing cracks will interact with pores, it is unclear whether the magnitude of this effect is sufficient to influence the fracture energy. To study this, experiments have been carried out where cracks have been grown through simple distributions of pores in poly(methyl methacrylate). These s…
Resonant photoemission of single crystals of the double perovskites $\mathrm{Gd}\mathrm{Ba}{\mathrm{Co}}_{2}{\mathrm{O}}_{5+\mathrm{\ensuremath{\delta}}}$ and $\mathrm{Dy}\mathrm{Ba}{\mathrm{Co}}_{2}{\mathrm{O}}_{5+\mathrm{\ensuremath{\delta}}}$ has been carried out at the UK Synchrotron Radiation Source at Daresbury.…
Abstract Pyrochlore has been considered as a waste form to immobilize high-level nuclear waste such as excess weapons-grade plutonium. In order to study the aqueous stability of pyrochlore, we have carried out hydrothermal experiments with a natural microlite (Nb + Ta > 2Ti; Ta ⩾ Nb) at 175°C in a neutral and acidi…
The transparent semiconducting copper iodide ( CuI ) films were deposited by pulsed laser deposition (PLD) and their structural and optoelectrical properties in the power output of TiO 2 | Dye | CuI cells are reported. These CuI films exhibited optical transmittance of over 80% in the wavelength range from 400 to 900…
We report photoemission and near-edge x-ray absorption fine structure measurements of the occupied and unoccupied valence electronic states of the regular surface layer of Bacillus sphaericus, which is widely used as the protein template for the fabrication of metallic nanostructures. The two-dimensional protein cryst…
A VHF method (30-300 MHz) is applied to identify faults and defects in ceramic insulators. Insulators which exhibit internal cracks and fractures are used as test samples. Different artificial conditions are introduced to the test samples according to the IEC 507 standard under wet and dry conditions. Using a cascadin…