Materials Literature
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Abstract Two types of environmentally friendly jute‐fiber‐reinforced green composites based on Mesua ferrea L. were prepared with poly(urethane ester) and poly(urethane amide) resin blends with commercially available partially butylated melamine–formaldehyde and epoxy resins through solution impregnation and hot‐curin…
In a sharp contrast to bulk Sm0.55Sr0.45MnO3 (SSMO) the SSMO films grown on LaAlO3 and SrTiO3 substrates exhibit insulating behavior with a negligible magnetoresistive effect. However, when these films are buffered by a thin layer of Nd0.55Sr0.45MnO3 a large low field magnetoresistance along with the bulklike properti…
A 2D computational fluid dynamics (CFD) model is developed to study the performance of an advanced planar solid oxide fuel cell based on proton conducting electrolyte (SOFC-H). The governing equations are solved with the finite volume method (FVM). Simulations are conducted to understand the transport phenomena and el…
Dispersions were studied of multiwall carbon nanotubes in cholesteric liquid crystals of three types: nematics with chiral dopant, mixtures of cholesterol derivatives, and similar mixtures close to smectic-A transition. In the first two cases, no appreciable effects of nanotubes upon selective reflection spectra were…
La 0.7 Sr 0.3 MnO 3 (LSMO) thin films grown by pulsed laser deposition on SrTiO 3 (STO) substrates with (1 0 0) and (1 1 0) crystallographic orientations are characterized by means of magneto-optic (MO) 'Kerr' spectroscopy at polar and longitudinal magnetizations combined with spectroscopic ellipsometry (SE) in the ph…
Abstract The characteristic features of LLDPE polymerization with ZN catalyst are the time drift effect during polymerization and the bending effect when trying to decrease density of the copolymer by adding more comonomer to the polymerization. The time drift in LLDPE polymerization is revealed by a constant decrease…
By hydrogen insertion into Ni51Mn49−xInx (x=16.2,16.6) Heusler alloys, the interstitial compounds Ni51Mn49−xInxHδ were fabricated. The introduction of H atoms does not change the L21 structure of the alloys but shifts martensitic temperature (TM) to lower temperature. Magnetic measurements indicated the hydrogenated N…
Density-functional calculations were carried out for ${\text{AgCrO}}_{2}$ to examine its spin exchange and ferroelectric polarization. In the multiferroic state of ${\text{AgCrO}}_{2}$ the triangular spin lattice of each ${\text{CrO}}_{2}$ layer forms parallel chains with helical-spin order. The spin exchange interact…
We have used density functional theory (DFT) calculations to investigate the oxidation of ammonia (NH 3 ) on a RuO 2 (110) surface. We characterized the possible reaction pathways for the dehydrogenation of NH x species ( x = 1−3) and the formation of the oxidation products N 2, NO, and H 2 O. The presence of oxygen a…
The effect of an ultrasonic wave on the nematic texture has long been known, but its interpretation in terms of a coherent dynamical theory has not yet been achieved. A proposal for such a theory is made in this paper. The diverse theoretical approaches attempted in the past to describe the interaction between sound a…
We developed an electro-optical device based on the flexoelectric effect of a polymer-stabilized cholesteric liquid crystal with a uniform lying helix. Using a dual-frequency switchable nematic, a small amount of chiral dopant and a small amount of phase-separated polymer localized at the substrate surfaces, we were a…
Electroactivity of polypyrrole hyaluronic acid, electropolymerized in the presence of oxidized carbon nanotubes (PPyHA-CNT) was studied in situ by electrochemical atomic force microscopy (EC-AFM) in physiological electrolyte solution. In situ Raman spectroscopic and quartz crystal microbalance (QCM) studies were condu…
Nanostructures such as carbon nanotubes and titanium dioxide (TiO 2 ) offer the means to create novel nanoscale devices and technologies. The question as to whether or not TiO 2 -nanoparticle (TiO 2 -NP) can be encapsulated in a single-walled carbon nanotube (SWNT) depends on the physical and chemical interactions bet…
A universal 2D transformation formula for embedded transformation optics is suggested. Linear and nonlinear transformation results using the suggested formula under different conditions reveal several interesting phenomena and potential applications, and designs for various polarization controllers can be achieved bas…
We numerically investigate the optical field enhancement supported by gap surface plasmon polaritons (GSPPs). The optical field enhancement at the edge of the nanostructures originates not only from localized surface plasmon (LSP) resonance but also from multiple scattering and coupling of GSPPs in the spacer region b…
Transparent glass ceramics containing Li2ZnSiO4:Cr4+ nanocrystals are prepared and their optical properties are investigated. The glass ceramics show intense broadband infrared luminescence and long fluorescence lifetime of about 90 μs. The single-pass optical amplification is demonstrated on a traditional two-wave mi…
The magnetostriction of ${\text{Fe}}_{1\ensuremath{-}x}{\text{Ge}}_{x}$ with $x\ensuremath{\le}25%$ has been investigated with the density functional all-electron full-potential-linearized augmented plane wave method. It was found that at low concentration the magnetostriction linearly increases with $x$, because of e…
Electrospun poly(ester urethane)urea (PEUU) scaffolds contain complex multiscale hierarchical structures that work simultaneously to produce unique macrolevel mechanical behaviors. In this study, we focused on quantifying key multiscale scaffold structural features to elucidate the mechanisms by which these scaffolds…
Abstract A mixture of formic acid/acetic acid makes it possible to electrospin polyamide 6.6 in steady state conditions. Steady state conditions are essential in nozzle electrospinning to generate a stable process which fabricates reproducible material, permitting industrial upscaling. This study shows that only a lim…
A versatile chemical vapor deposition (CVD) based method for the fabrication and electrical measurement of individual carbon nanotube junctions was developed. ferritin or Fe particles were grafted on multiwalled carbon nanotubes (MWNTs) and used as catalysts for the subsequent growth of secondary MWNT by CVD. Junction…