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。
O polvilho azedo e um amido modificado por via fotoquimica em um processo de fermentacao anaerobia e secagem ao sol, nao havendo padronizacao no processo de producao, o que acarreta na obtencao de produtos com caracteristicas diferentes, o que e indesejavel para aplicacoes principalmente na industria de alimentos. Mui…
High performance SnO 2 -based bottom electrodes are necessary for tandem dye-sensitized solar cells (DSSCs) harvesting infrared (IR) lights. Sensitizing dyes based on macrocyclic ligands are one of the candidates among the IR dyes. However, it is difficult to introduce anchoring groups such as carboxylic acid at the r…
Multilayered nitride heterostructures AlN/AlGaN/GaN/AlGaN are grown using a Nanofab-100 multichamber domestic complex involving a STE3N3 specialized installation of molecular beam epitaxy. The obtained heterostructures have high structural quality, smooth morphology, and a low dislocation density, which demonstrates t…
Abstract We discuss a fabrication process for making graphene devices based on encapsulated graphene for reducing contaminations during individual processing steps. A 3–5 nm alumina layer is deposited directly after exfoliating graphene, protecting it during the entire processing. We show that the visibility of the en…
Various microstructural and chemical analysis techniques were applied to study two types (type-A and B) of self-assembled laterally aligned Fe nanowires (NWs) fabricated by molecular beam epitaxy on a ZnS buffer layer. The formation of the three-dimensional shapes of these NWs was found to be driven by the principle o…
Several biosensing techniques like SPR and QCM use glass as the substrate, bearing a thin Au layer which serves as the sensing surface. Other substrates of interest include Si due to processing knowledge and the potential integration of electronics, and Cytop which has a refractive index close to that of water. Au on…
Abstract Magnetic star‐shaped amphiphilic copolymers (S‐Fe3O4‐PLA‐b‐MPEG) consisting of Fe3O4 as the core, poly(L,D‐lactide) (PLA) as the inner layer, and monomethyl polyethylene glycol (MPEG) as the out shell were synthesized. The syntheses included ring‐opening polymerization of L,D‐lactide initiated by hydroxyl mod…
Abstract The quantum efficiency (QE) of Er3+‐doped silicate, tellurite, phosphate and fluoride glasses have been examined under simulated sunlight excitation. The maximum of total QE, the sum of QE of 4S3/2, 4I11/2, 4I13/2→4I15/2 and 4S3/2→4I13/2 transition, is 75% and the maximum of QE1530, the QE of the 4I13/2→4I15/…
The effect of the suppression of flux creep in a high-temperature superconductor by counter forces exerted on the vortex ends was studied. These forces, acting in the opposite direction to the process of vortex diffusion, arise when the magnetized sample is put into a nonuniform magnetic field. The source of the field…
Mixed ligand Cu(II) complexes of the type [M(Q)(L)]-2H2O have been synthesized using 8-hydroxyquinoline (HQ) as a primary ligand and N- and/or O-donor amino acids (HL) such as L-threonine, L-proline, L-hydroxyproline, L-isoleucine and L-serine as secondary ligands. The metal complexes have been characterized on the ba…
Increased application of polymer matrix composite (PMC) materials in large vehicle structures requires consideration of non-autoclave manufacturing technology. The NASA Composites for Exploration project, and its predecessor, Lightweight Spacecraft Structures and Materials project, were tasked with the development of…
Abstract A comprehensive model for the vapour liquid solid based growth of ZnSe nanowires is developed and applied to the optimisation of growth conditions for ZnSe nanowires. The model provided insight into the role of fluid dynamics and adatom incorporation, on the growth of nanowires. When applied experimentally, w…
Different variants of design solutions for thermoelectric systems (TESs) with various cooling powers used to maintain thermal conditions of computing machinery are proposed. Techniques for the calculation of thermoelectric blocks, confirmed by the results of investigations of the fabricated TES units, were developed.
Abstract Biocomposites from carbon fibre (CF) and poly(hydroxybutyrate‐co‐hydroxyvalerate) (PHBV) bioplastic were fabricated by extrusion followed by injection moulding. The effects of fibre length and fibre loading on the performance of PHBV/CF composites were investigated. The amount of CF (for both 150 µm and 6 mm…
Abstract Photoluminescence (PL), PL lifetime, and radioluminescence (RL) measurements were made on LaF3 nanoparticles doped with Eu3+ or Sm3+. The radiative lifetimes decreased with increasing rare earth concentrations, which can be attributed to energy transfer to the surface of the nanoparticles followed by non‐radi…
We design and synthesize various π-conjugated phenyltriene chromophores having different thiolated electron donor groups such as thiol, alkylthiol, and arylthiol groups to systematically investigate the electron-donating ability of sulfur analogues. For comparison, we also investigate the commonly used electron donor…
Abstract This article addresses the preparation and characterization of composite materials obtained with compression molding of mixtures of aluminum powder and a commercial grade thermosetting resin of poly(urea‐formaldehyde) filled with α‐cellulose in powder form. The homogeneity of these composites was checked by t…
Abstract Two 2D zinc(II) layered coordination polymer compounds [Zn2(atz)2(na)2]n (1), and [Zn(atz)(ina)]n (2) (Hatz = 3‐amino‐1H‐1, 2, 4‐triazole, na = nicotinic acid, ina = isonicotinic acid) were synthesized and structurally characterized by elemental analysis, FT‐IR, thermogravimetric analysis (TGA), powder X‐ray…
Abstract Ce1%:(GdxY1‐x)3Al5O12 (x=0, 0.2, 0.4, 0.6 and 0.8) crystals were grown by the μ‐PD method. In the range of x=0∼0.4, the grown crystals showed single garnet phase, but x=0.6 and 0.8 crystals showed secondary perovskite phase. In these crystals, Ce3+ 4f‐5d emission was observed within 500‐530 nm wavelength. Emi…
A new molecular receptor (1) for ammonium recognition has been designed and constructed by using only carbon atoms. This molecular receptor can co-exist in two different isoenergetic conformations but, upon complexation, the conformers are no longer isoenergetic, and a basket-shaped conformation becomes clearly more s…