Materials Literature
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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…
In the present study, a combination of a hydrothermal route and a topotaxial conversion reaction has been used to grow a cadmium sulfide-copper sulfide (CdS-Cu(x)S) single nanorod heterojunction. The J-V characteristics of the CdS nanorods show Shockley behaviour consistent with the energy band diagram of the platinum…
Solutions of sodium trifluoromethanesulfonate, magnesium trifluoromethanesulfonate, and barium perchlorate in N,N-dimethylformamide (DMF) have been investigated using broadband dielectric relaxation spectroscopy at 25 °C. All spectra were dominated by a solvent relaxation process centered at ∼15 GHz but also exhibited…
We fabricate, pattern, and analyze thin films composed of multilayer graphene nanoribbons. These films are conductive at room temperature but depict noticeable insulating behavior at low temperatures (<20 K) due to their disordered structure. We study the transport in this strong localization regime by analyzing the d…
The elasticity and flexibility of a silicalite-1 film grown on a metglas ribbon is demonstrated. Adsorption of n-hexane induces “swelling” of the zeolite film, which causes the bending of the ribbon. The deformation is reversible, repeatable, and its magnitude depends on the adsorbed organic vapor.
Multi-stage growth of ZnO nanorod arrays has been carried out by Au-assisted chemical vapor deposition (CVD) in order to better understand and more precisely control the growth behaviors. It is evidenced that Au-catalyzed vapor-liquid-solid (VLS) growth only dominates the initial site-specific nucleation of the nanoro…
A new fast high-power fault current limiter made from epitaxial and polycrystalline$\hbox{La}_{0.83}\hbox{Sr}_{0.17}\hbox{MnO}_{3}$thin films and operating at 80 K has been demonstrated. An epitaxial film that exhibits a current-induced increase in its resistance is connected in series with a 50-$\Omega$-impedance tra…
Co/Cu-multilayer nanowires can be exploited to develop magnetoresistive sensors. One of the easiest methods for their production is filling nanoporous templates by pulsed-electrodeposition (PED) from a single bath. Multiple parameters effecting the growth of these nano-objects must be controlled to tailor their proper…
Droplets of an aqueous phase placed on a very hydrophobic, waxy surface bead-up rather than spread, forming a sessile drop with a relatively large contact angle at the edge of the drop. Surfactant molecules, when dissolved in the aqueous phase, can facilitate the wetting of an aqueous drop on a hydrophobic surface. On…
Abstract High‐energy gamma radiation from 60 Co‐gamma radiation source has been used to covalently link acrylic acid to teflon by mutual radiation grafting technique. Effect of various experimental parameters viz, dose, dose rate, monomer concentration, backbone thickness effect of additives on grafting extent was inv…
Abstract The biodegradability, morphology, and mechanical properties of composite materials made of poly(butylene succinate adipate) (PBSA) and sugarcane bagasse (SCB) were evaluated. Composites containing maleic anhydride (MA)‐grafted PBSA (PBSA‐ g ‐MA/SCB) exhibited noticeably superior mechanical properties because…
Abstract A supercooled melt of isotactic polypropylene (iPP) was extruded through a capillary die. Polarized light microscopy (PLM), wide‐angle X‐ray diffraction (WAXD), and differential scanning calorimetry (DSC) were used to investigate the effects of the relatively weak wall shear stress (σ w ), extrusion temperatu…