Materials Literature
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This paper presents the results of a series of indoor laboratory experiments carried out on dc-energized overhead conductors subjected to simulated rainfall. In a first set of experiments, the impact of rain intensity on the corona onset voltage and total corona losses was investigated. With regard to the onset voltag…
Two new chitosan derivatives, polyamine grafted chitosan copolymers have been synthesized for corrosion protection of carbon steel in acidic medium. First, methyl acrylate graft chitosan copolymer (CS-MAA) was prepared by the reaction of chitosan (CS) and methyl acrylate (MAA) via the Michael addition reaction. Then,…
The present study was performed to evaluate the subchronic toxicity of Silvernano particles (AgNPs) at a diameter 23.1±3.3 nm on normal and irradiated rats (4Gy) following 28 days of oral administration as compared to vehicle control .In the term of LD50 the lethality of AgNPs in normal and irradiated mice was underta…
The hydrogen isotope effect on the thermodynamic and kinetics of hydrogen/deuterium absorption–desorption in a single-phase ternary alloy Pd 0.77 Ag 0.10 Cu 0.13 having fcc crystal structure was investigated using a Sievert-type volumetric apparatus to explore its viability for use in room-temperature self-displacemen…
We demonstrate that in-plane 2D propagation and focusing of a laser-induced shock wave result in enhanced nano-crystallization of highly ordered pyrolytic graphite. Throughout the 2D shock focusing technique, which enables to clearly distinguish between the laser-induced and the shock-induced transformation/transition…
The growth and nucleation of biominerals are directed and affected by associated biological molecules. In this paper, we investigate the influence of occluded biomolecules on biogenic calcite from the coccolithophorid Pleurochrysis carterae and from chalk, a rock composed predominantly of fossil coccoliths. We compare…
Vanadium sesquioxide ${\mathrm{V}}_{2}{\mathrm{O}}_{3}$ is considered a textbook example of Mott-Hubbard physics. In this paper, we present an extended optical study of its whole temperature/doping phase diagram as obtained by doping the pure material with $M=\text{Cr}$ or Ti atoms $({\mathrm{V}}_{1\ensuremath{-}x}\ph…
The intramolecular magnetic exchange coupling of edge terminated zigzag graphene nanoribbon (ZGNR) was studied with density functional theory calculations. In order to examine the applicability of the spin alternation rule and a classification scheme for radicals and couplers on functionalized graphene nanoribbons, we…
Trivalent Dy doped α- Al 2 O 3 phosphor was synthesized by low temperature solution combustion method using urea as fuel. The phosphor was well characterized by X-ray diffraction (XRD), photoluminescence (PL) spectroscopy and diffused reflectance spectroscopy (DRS). XRD study confirmed the hexagonal structure of Dy 3+…
The chitosan filled thermoplastic elastomer (TPE) composites with different filler loading was prepared by melt mixing at 180 °C. The effect of 3-aminopropyltriethoxysilane (3-APE) as coupling agent on the rheological and thermal properties of composites were investigated. The melt flow indexer was used to characteriz…
Four hybrid polyoxometalate-porphyrin copolymer films were obtained by the electrooxidation of zinc octaethylporphyrin in the presence of four different Dawson-type polyoxometalates bearing two pyridyl groups (POM(py)2) with various spacers. The POM monomers were designed around 1,3,5-trisubstituted benzene rings. Two…
Purpose – The purpose of this paper is to report on the feasibility of the manufacture of printed rechargeable power sources incorporating, in the first instance, electrode structures from the previous study, and moving on to improved electrode structures fabricated, via flexographic printing, using commercially avail…
Abstract Polyoxometalate (POM) cluster anions are shown to serve as covalently coordinated ligands for anatase‐TiO 2 nanocrystals, giving isolable assemblies uniquely positioned between molecular macroanions and traditional colloidal nanoparticles. Na + salts of the water‐soluble polyanionic structures are obtained by…
Abstract Strontium carbonate (SrCO 3 ) nanostructures were synthesized via simple hydrothermal method by Sr(NO 3 ) 2 , ethylenediamine and hydrazine as reagents. The products were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and Fourier tran…
Colloidal diluted magnetic semiconductor (DMS) nanocrystals are model systems for studying spin effects in semiconductor nanostructures with relevance to future spin-based information processing technologies. The introduction of excess delocalized charge carriers into such nanocrystals turns on strong dopant-carrier m…
The corrosion inhibition of aluminum in sulphuric acid using an aqueous extract of leaves of Morinda tinctoria (MT) was studied with weight loss and electrochemical techniques. It was found that the MT extract acts as a good inhibitor for aluminum corrosion in the sulphuric acid medium. The inhibition efficiency of th…
Surface-grafting thermoresponsive polymers allows the preparation of thin polymer brush coatings with surface properties that can be manipulated by variation of temperature. In most instances, thermoresponsive polymer brushes are produced using polymers that dehydrate and collapse above a certain temperature. This rep…
Theoretical and experimental evidence for non-linear hydrogen bonds in protein helices is ubiquitous. In particular, amide three-centered hydrogen bonds are common features of helices in high-resolution crystal structures of proteins. These high-resolution structures (1.0 to 1.5 Å nominal crystallographic resolution)…
Molecular dynamics simulations have been performed to investigate the transport properties of a single Ca(2+), K(+), and Na(+) in a water-filled transmembrane cyclic peptide nanotube (CPNT). Two transmembrane CPNTs, i.e., 8×(WL)n=4,5/POPE (with uniform lengths but various radii), were applied to clarify the dependence…
We argue that at finite carrier density and large displacement fields, bilayer graphene is prone to $\ensuremath{\ell}=0$ and $\ensuremath{\ell}=1$ Pomeranchuk Fermi-surface instabilities. The broken symmetries are driven by nonlocal exchange interactions which favor momentum-space condensation. We find that electron-…