Materials Literature
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Effects of Ru and Re promoters on Co-CoOx catalysts supported on γ-Al2O3, TiO2 and SiC were investigated to improve the understanding of the role of promoters of the active phase of Co-CoOx-Ru and Co-CoOx-Re. The influence of promoter addition on the composition and activity of the catalysts was characterized by sever…
The polymeric materials are characterized by high flammability.The use of flame retardants in order to reduce the flammability of polymers can lead to the formation of toxic gaseous products under fire conditions.In this work we studied the effect of boric acid on the volatile products of thermooxidative degradation o…
Structure and morphology determine the properties of polymeric materials. This atlas provides, with over 2000 high-quality micrographs a comprehensive overview of the structural/morphological diversity of all classes of plastics. All microscopic techniques from light microscopy through scanning and transmission electr…
Abstract BiS2-based compounds constitute a new family of layered superconductors. In this article, several experimental findings on the superconductivity and related properties of the BiS2 family are reviewed. In particular, the focus is on the conditions required for the emergence of superconductivity and higher supe…
A series of experiments is conducted on laboratory and pilot-production installation for the application of high-voltage pulsed discharge in the processes of enrichment of goldbearing mineral raw materials with a relatively low energy electrical discharge in the pulse of 120 J. At the same time the conglomerates of cl…
The one-dimensional electronic structure of single-walled carbon nanotubes (SWCNTs) provides appealing properties, including excellent optical, electrical, mechanical, and thermal properties [1]. Specifically, for light-harvesting applications, SWCNTs are superior in terms of their wide absorption spectrum ranging fro…
The charge carriers relaxation dynamics in synthesized poly(3,4‐ethylenedioxythiophene) nanotubes has been investigated as a function of frequency and temperature through the framework of dielectric permittivity, modulus formalism and impedance formalism. The fitting of experimental data of real part of dielectric per…
The influence of the porous structure of anodic alumina matrices on the structural and morphological properties of germanium nanostructures, obtained by high vacuum thermal deposition on anodic alumina, is reported. Scanning electron microscopy micrographs reveal the formation of Ge nanostructures in the form of rods…
The interest in the application of aluminium as a structural material has been greatly increased in recent years. However, behaviour of aluminium structures when exposed to fire is still relatively unresearched. Due to low melting temperature of the alloy, aluminium structures have low fire resistance, but aluminium i…
Electron injection into a graphene sheet through a slanted armchair graphene nanoribbon (AGNR) is investigated. An incident mode, or subband, in the AGNR is valley-unpolarized. Our attention is on the valley-resolved nature of the injected electron beams and its connection to the incident mode. It is known for a norma…
We report on the distinct surface state of electronic orders, including spin, orbital, and spin-state degrees of freedom of Co3+ ion, in an epitaxially strained thin film of LaCoO3 grown on (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 (LSAT) substrate. The surface ordered state was detected by the grazing-incidence resonant soft x-…
Small 2013, 9, 738–749 The authors regret that important funding information was missing from the Acknowledgements Section of their manuscript. The full and correct Acknowledgements Section is now provided below: “The authors would like to acknowledge the funds attributed by the Portuguese Foundation for Science and T…
ABSTRACT A series of glycerin‐crosslinked polyurethane (XPU)‐clay nanocomposites were prepared by in situ polymerization followed by solution casting and thermal treatment. The weight percent (wt %) of clay in the nanocomposites was varied between 0.25 and 10. The structural, rheological and dynamic mechanical propert…
Ultra-high resolution protein crystal structures have been considered as relatively reliable sources for defining details of protein geometry, such as the extent to which the peptide unit deviates from planarity. Chellapa and Rose (Proteins 2015; 83:1687) recently called this into question, reporting that for a dozen…
The determination of the state of strain in implanted materials is a key issue in the study of their mechanical stability. Whereas this question is nowadays relatively easily solved in the case of single crystals, it remains a challenging task in the case of polycrystalline materials. In this paper, we take benefit of…
We have studied the effect of structural disorder on the de Haas van Alphen and Shubnikov de Haas quantum oscillations measured in natural, Kish, and highly oriented pyrolytic graphite samples at temperatures down to 30 mK and at magnetic fields up to 14 T. The measurements were performed on different samples characte…
Coherent-epitaxial ferroelectric BaTiO3 films are grown on Si by using a SrTiO3/SrO1+δ/YSZ trilayered buffer. The SrTiO3/SrO1+δ interface produces significant improvements in the BaTiO3/(La,Sr)MnO3 heterostructure, including perfect (001) orientation, high crystallinity, and sharp and uniform interfaces. The BaTiO3-ba…
La 2 NiO 4+δ ‐based oxides, mixed ionic–electronic conductors with K 2 NiF 4 ‐type structure, have been considerably investigated in recent decades as electrode materials for advanced solid oxide fuel cells ( SOFC s) due to their high electrical conductivity and oxidation reduction reaction ( ORR ) activity. In this s…
To obtain much higher accurate jetting dispensing, an investigation on a jetting valve with ball needle and conical nozzle is done in this paper. The theoretical model on the relationship among needle, nozzle, and adhesive during the impact process is established first. The experiments are done on a jetting valve prot…
The UV‐excitable fluorescent poly(lactic acid) (PLA) fibers were spun by the traditional melt spinning process, and the effects of the fluorescent powder content (w(FP)) and draw ratio (DR) on the structure and properties of the fluorescent PLA fibers were investigated, respectively. The results showed that the emissi…