Materials Literature
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The hexagonal superconductor SrPtAs exhibits time-reversal-symmetry breaking below $T_c$, hinting at an unconventional pairing state. Therefore, the symmetry of the underlying crystal is important for the classification of possible gap structures and their mixing. Here, we use the generating point group D$_{6h}$ of Sr…
The formation and the growth of the corrosion film that forms on 3Cr steel surface in CO2 environments were characterized and investigated by scanning electron microscopy, energy dispersive spectrometry, quadrant back scattering detector, x-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy (EI…
Abstract 1,7‐Dibromo‐substituted perylene bisimides have been obtained in yields of at least 60 % in regioisomerically pure form by treating the commonly used dibromoperylene‐3,4,9,10‐tetracarboxylic dianhydride with 2‐(diethylamino)ethylamine or 2‐(dimethylamino)ethylamine and then separating the 1,7‐isomer from the…
The present study introduces a new calculation method for obtaining nucleus density formed during nonisothermal crystallization of semicrystalline polymers. Isotactic polypropylene homopolymer (iPP) was used as a semicrystalline model polymer, and its crystalline structure was modified using highly efficient nucleatin…
The co‐addition of rubber‐like poly(ε‐caprolactone‐co‐D, l‐lactide) (P[CL‐co‐LA]) as impact modifier and N,N′‐ethylenebis(stereamide) (EBS) as nucleating agent has here been investigated to tailor both the crystallization and toughness of resulting polylactide (PLA)‐based materials. In this work, 10 wt% of P[CL‐co‐LA]…
Commercial production of transparent conducting oxide (TCO) polycrystalline films requires high electrical conductivity with minimal degradation in optical transparency. Aqueous solution deposited TCO films would reduce production costs of TCO films but suffer from low electrical mobility, which severely degrades both…
Superhydrophobicity facilitates the development of self-cleaning, anti-biofouling, and anti-corrosion surfaces. The leaves of the lotus (Nelumbo nucifera) and taro (Colocasia esculenta) plants are well known for their self-cleaning properties. A hierarchical structure comprising papillae epidermal cells superimposed w…
GRAPHICAL ABSTRACTSynthesis of Thiourea Derivatives and its Evaluation as Corrosion Inhibitor For Carbon SteelAll authorsClara G. M. de Oliveira, Vitor W. Faria, Gabriel F. de Andrade, Eliane D’Elia, Murilo F. Cabral, Bruno A. Cotrim, Gabriel O. Resende & Flávia C. de Souzahttps://doi.org/10.1080/10426507.2015.1035719…
A 20-period-thick chiral sculptured thin film (STF) of zinc selenide was fabricated on a glass slide by thermal evaporation. A variable-angle spectroscopic system was devised and used to measure all eight of the circular remittances of the chiral STF as functions of the angle of incidence and the free-space wavelength…
ABSTRACT Graphene nanoplatelets (GNPs) have excellent thermal, electrical, and mechanical properties. The incorporation of GNPs into a polymer can remarkably enhance the thermal and mechanical properties of the polymer especially when GNPs are well dispersed in the polymer matrix with strong interfacial bonding. There…
The morphology and constitution of the intermetallic layers formed on the surface of duplex stainless steels (DSSs) immersed in molten aluminum at 750 °C for 30 min have been studied in detail by scanning electron microscopy and electron probe micro‐analyzer. Compared with H13 steel, the DSSs exhibited a better corros…
In this study, novel carbohydrate-based nanoconjugates combining chemically modified chitosan with semiconductor quantum dots (QDs) were designed and synthesised via single-step aqueous route at room temperature. Glycol chitosan (G-CHI) was used as the capping ligand aiming to improve the water solubility of the nanoc…
Continuous and stable operation of a membrane reactor for 1054 h to dehydrogenate methylcyclohexane for the purpose of producing high-purity H 2, using a dimethoxydiphenylsilane (DMDPS)-derived silica membrane, is successfully demonstrated. The silica membrane used was prepared via a chemical vapor deposition method,…
Abstract In this study, the characteristic physicochemical and electrical properties of HCl‐doped polyaniline (PAni) films grown via oxidative chemical polymerization of aniline on n ‐Si(100) are presented. Two exothermic processes were found for 0.2 M HCl solution during aniline polymerization while all others underw…
Segmented polyurethanes based on poly(tetramethylene glycol) soft segments (SS) containing aromatic units are synthesized. Hydroquinone bis(2-hydroxyethyl) ether and 4,4′-methylenebis(phenyl isocyanate) are used as the chain extender and the diisocyanate, respectively. Effects of incorporation of hydroquinone (HQ) and…
Thickness dependencies of the optical properties of as-deposited amorphous 30Li2O–10WO3–60B2O3 thin films prepared by electron beam evaporation on glass substrates at a base pressure of 9 × 10−7 Torr were studied. Glancing angle X-ray diffraction studies were performed to confirm the amorphous nature of the prepared f…
Abstract Catalytic CO2 reduction has been performed using carbon nanofibers or nitrogen‐doped carbon nanofibers as a support for Ru nanoparticles. The catalyst that consists of 5 wt % Ru on nitrogen‐doped carbon nanofibers exhibited the highest conversion at a relatively low temperature, complete selectivity to CH4, a…
Abstract Treatment of meso‐chlorosubporphyrin with potassium hydroxide in DMSO followed by aqueous work up and recrystallization gave a cyclic trimer consisting of meso‐hydroxysubporphyrin units linked between the central boron atoms and meso‐hydroxy groups. Solutions of this trimer are nonfluorescent, but become fluo…
To accelerate the commercial application of mixed‐conducting membrane reactor for catalytic reaction processes, a robust mixed‐conducting multichannel hollow fiber (MCMHF) membrane reactor was constructed and characterized in this work. The MCMHF membrane based on reduction‐tolerant and CO 2 ‐stable SrFe 0.8 Nb 0.2 O…
In this paper, the snap-through buckling of an initially curved microbeam subject to an electrostatic force, accounting for fringing field effect, is investigated. The general governing equations of the curved microbeam are developed using Euler-Bernoulli beam theory and used to develop a new criterion for the snap-th…