Materials Literature
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First-principles calculations and semi-empirical equations are employed to determine the self-diffusion mobility of fcc Mg. All factors entering the vacancy-mediated self-diffusion coefficient, which include the equilibrium lattice parameter, the enthalpy of vacancy formation and atom migration, and the vibrational en…
Abstract Grafting poly(methyl methacrylate) or PMMA from natural rubber (NR) using ATRP process, NR has to be transformed into bromoalkyl‐functionalized NR (NRBr) acting as ATRP macroinitiator. The NRBr was prepared by two‐step chemical modification i.e., epoxidation and epoxide ring opening reaction using a nucleophi…
We report the preparation and physical properties of reduced anatase TiO 2-δ thin films obtained via a low-temperature (low- T ) reduction using CaH 2 . The oxygen amounts were controlled in a wider range than ever reported. Some highly reduced anatase films showed resistivities as low as 10 -3 Ω cm at room temperatur…
Abstract To obtain highly transparent isotactic polypropylene (PP) sheet by an industrial process, the influences of the isotacticity and metallocene linear low‐density polyethylene (L‐LDPE) as crystallization control material were analyzed. The sheet samples were extruded by using a direct single‐belt process. Even i…
An anionic gelator, D-C12ValC10COONa, derived from D-valine can cause physical gels in water and organic solvents. Helical 4,4(')-biphenylene-silica nanotubes and nanoribbons were prepared using it with 3-aminopropyltrimethoxysilane as a co-structure-directing agent and 4,4(')-bis(triethoxysilyl)-1,1(')-biphenyl (BTES…
Silver (Ag) films of varying thickness were simultaneously deposited using physical vapor deposition (PVD) onto six infrared (IR) substrates (BaF(2), CaF(2), Ge, AMTIR, KRS-5, and ZnSe) in order to correlate the morphology of the deposited film with optimal SEIRA response and spectral band symmetry and quality. Signif…
First-principle calculations show that free-electron carriers are induced in few-layer hexagonal boron nitride ($h$-BN) by applying an external electric field. The electric field substantially shifts the particular states downward, and they finally cross the Fermi level under an electric field of a few volts per nanom…
After a flood, large amounts of water and mud can remain trapped in substation equipment, making the repair of such equipment a sizable task and lengthening the restoration task. Certain preventive measures and preparatory steps can help diminish such impacts and reduce restoration times. Extreme weather impacts, such…
This study reports a tunable metallo-supramolecular assembly strategy to construct microscaled objects with different morphologies. Three well-defined discrete microstructures—microspheres, microtubes, and microrods—have been fabricated through metal−organic coordination between the same organic unit and different tra…
The wet-lay nonwoven processing is divided into fiber dispersing and blending, web formation, drying, and finally, consolidating the formed web. Fiber dispersion is the most crucial step of this process. The required time and necessary agitation to separate and disperse fibers depends on fiber characteristics. In this…
A symmetric metamaterial superlattice is introduced accommodating a high Q-factor trapped mode. THz time-domain spectroscopy is employed to measure the transmission spectra, identifying the excitation of trapped and open-modes in the meta-resonances. A finite-difference-time- domain calculation showed that the trapped…
FuelCell Energy, Inc. (FCE) has developed products based on its Direct FuelCell® (DFC®) technology with efficiencies near 50% based on lower heating values of natural gas. DFC is an internally reformed molten carbonate fuel cell, which operates in the 550–700°C range. The combination of the internal reforming of metha…
Abstract The mechanical and thermal characteristics and morphology of polyamide 6 (PA6)/isotactic polypropylene (iPP) blends (10/90 w/w) prepared with different processing procedures and incorporated with an aryl amide nucleating agent, a kind of β‐nucleating agent (β‐NA) for iPP, were investigated. The yield strength…
The effect of chemical and hydrostatic pressure has been studied systematically in a selected system belonging to the 1111 family of iron pnictide high-temperature superconductors. The results show a surprising similarity between the trend of critical temperature vs hydrostatic pressure for isoelectronic samples with…
Hydrothermally grown ZnO nanorods show high interaction rates with H₂ when the spacing between adjacent nanorods decreases. Density functional theory calculations showed the interaction between nanorod surfaces in-registry is attractive at separations < 5 Å, while it is repulsive for out-of-registry alignments, indica…
We report the fluorescence decrease of the water-soluble π-π-conjugated polymer poly(2-methoxy-5-propyloxy sulfonate phenylene vinylene, MPS-PPV) by the catalytic activity of horseradish peroxidase in the presence of H(2)O(2). MPS-PPV acts as a donor substrate in the catalytic cycle of horseradish peroxidase where the…
Abstract Terahertz (THz) power amplification in coplanar waveguide composite right left‐handed transmission line (CPW CRLH TL) metamaterials with carbon nanotubes (CNTs) has been investigated. The negative differential resistance (NDR) behavior of the CNTs with appropriate DC voltage bias, which can be characterized a…
Abstract A size‐independent rectangular resonator supporting a mode with a uniform electromagnetic field is presented. This resonator uses a 2D array of metallic wires emulating an effective medium with zero permittivity at the resonance frequency. The field expressions for the resonator are derived and simulation res…
Si-faceted dendrites growth orientation as a function of twin spacing and undercooling were investigated by in situ observation, and the mechanisms of the growth behaviors were discussed and clarified. The growth orientation of Si-faceted dendrites strongly depends on the twin spacing and undercooling. For a given und…
The induced current density, corresponding to the massless Dirac equation in ($2+1$) dimensions in a magnetic flux tube of small radius is considered. This problem is important for graphene. In the case when an electron cannot penetrate the region of nonzero magnetic field, this current is the odd periodical function…