Materials Literature
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PEDOT formulations in acetonitrile have been synthesised using a phase transfer reaction involving two steps; being a polymerization in water and then a subsequent coagulation of the corresponding PEDOT by anion exchange. The strategy followed is to synthesise organic formulations using a less acidic stabilizer and fi…
We studied the hydrogen absorption and desorption properties of thin Pd-covered Mg1−xAlx alloy films as a function of temperature and alloy composition. Using neutron reflectometry, we were able to determine the hydrogen content and the hydrogen distribution within these MgAl films in situ. For all films, hydrogen was…
The van de Waals potential energy between two parallel infinitely long radially deformed single-walled carbon nanotubes is calculated within the Lennard-Jones approximation. The radial deformations are described with analytical shapes in order to facilitate the calculations. The most preferred mutual orientations are…
Ti ( 200 Å ) ∕ Au ( 800 Å ) Ohmic contacts to n-type amorphous indium zinc oxide (IZO) films with carrier concentrations of (1×1015)–(5×1020)cm−3 showed as-deposited specific contact resistances in the range of (3×10−1)–(1×10−4)Ωcm2. Postgrowth annealing from 200to500°C resulted in significant improvement in contact r…
Abstract Nickel‐coated multiwalled carbon nanotubes (Ni‐MWNT) were prepared by electroless deposition with ultrasonic vibrations. The morphologies and components were characterized by scanning electron microscope and energy dispersive spectroscopy. Two types of fillers, multiwalled carbon nanotubes (MWNT) and Ni‐MWNT,…
In this work, we present an alternative approach to sensitize the near infrared emission of Er3+ ions (used in telecom applications) by exploiting the geometrical confinement occurring in porous zeolites structures. The sensitization of the Ln ion is obtained by energy transfer between a suitable organic molecule acti…
Body armour technologists over the years are seeking to develop protective systems which are both effective and lightweight. However these hard armour materials are very expensive and have certain weight constraints. From this point of view, natural fibres and fillers have attracted the attention of researchers due to…
We report on a simple way to control the red luminescence from silicon quantum dots (Si QDs) in hydrogenated amorphous silicon nitride. The achievement has been realized through annealing treatments, which effectively modify the dot size, density, and surface chemistry. High resolution transmission electron microscopy…
Abstract In‐situ coating of polyaniline (PAni) on nylon 6 filaments was carried out by oxidative emulsion polymerization of aniline in presence of nylon 6 filaments. The semiconducting composites were prepared by mixing polyaniline coated Nylon 6 (PN6) with a polyolefinic thermoplastic elastomer namely ethylene 1‐octe…
Dynamic yield strength of mild steel is estimated when impacted by the steel balls launchedby two stage-light gas gun in the velocity region 1900-5200 m/s. The ball impact provides a radialmomentum to the target material resulting in a crater which spreads out until it is stopped bythe target yield strength. The dynam…
Abstract In this article, gas penetration‐induced skin‐core structure of isotactic polypropylene(iPP), which is molded by gas‐assisted injection molding at different gas pressures, was investigated. For comparison, the counterpart was also molded by conventional injection molding (CIM) using the same processing parame…
Abstract Octa(aminophenyl)silsesquioxane (OAPS) was prepared in two steps by the nitration of octaphenylsilsesquioxane (OPS) in fuming nitric acid to form octa(nitrophenyl)silsesquioxane (ONPS), followed by the mild reduction of ONPS with Pd/C as a catalyst. OPS, ONPS and OAPS were characterized by FTIR, 1 H NMR, and…
We experimentally and theoretically report the magnetoelectric effect in a composite made by sandwiching one shear mode 0.7PbMg1∕3Nb2∕3O3–0.3PbTiO3 (PMN-PT) piezoelectric single crystal plate between two longitudinally magnetized NdFeB permanent magnet bars along the length direction of the PMN-PT plate. The magnetoel…
We perform first-principles density-functional-theory calculations to determine the stability and associated physical and electronic properties of different adsorption phases of N on Cu (100) and Cu (110) substrates for coverages ranging from 0.125 to 1 monolayer (ML). For N on Cu (100), we consider adsorption in four…
Strong magnetoelectric coupling was observed at microwave frequencies in metallic magnetic film/lead zirconate titanate [Pb(Zr,Ti)O3] multiferroic composites, in which the magnetic films were either FeCoB or FeGaB with relatively high saturation magnetostriction constants between 40 and 70ppm and narrow ferromagnetic…
Abstract Fiber‐reinforced polymers have received considerable attention from industry in recent years. Due to the sharp ecological damage, worldwide shortage of trees in many areas and the global demand for fibrous material, there has been growing interest in the use of recycled wood fiber as an alternative or substit…
The temperature-dependent Raman frequency shift in single-walled carbon nanotube (SWCNT) rings in the range of 80–550K is investigated. We observe that the frequency decreases with increasing temperature for all Raman peaks of the nanotube rings. Furthermore, compared to the nanotubes with linear structure, the temper…
We have shown, using high resolution x-ray diffraction studies of nanoparticles, that size reduction can lead to an arrest of the high temperature phase in perovskite materials, which prevents growth of the low temperature phase that needs a specific crystal structure for its stabilization. This has been shown in the…
Er 3 + luminescence and cooperative upconversion in ErxY2−xSiO5 nanocrystal aggregates fabricated using Si nanowires is investigated. X-ray diffraction and photoluminescence spectroscopy indicate that the composition of the final nanocrystals can be varied continuously from pure Y2SiO5 to pure Er2SiO5 while keeping th…
Abstract The ionomer concept was introduced to the field of flame‐retardant polyesters for the first time. The ionic monomer, sodium salt of 2‐hydroxyethyl 3‐(phenylphosphinyl)propionate (SHPPP), was synthesized by selective esterification of 3‐(hydroxyphenylphosphinyl)propionic acid with ethylene glycol, followed by…