Materials Literature
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We demonstrate a robust frustration-driven charge order to superconductivity transition in the half-filled negative-$U$ extended Hubbard model. Superconductivity extends over a broad region of the parameter space. We argue that the model provides the correct insight to understanding unconventional superconductivity in…
Abstract Octa(maleimidophenyl)silsesquioxane (OMPS) was synthesized, characterized, and employed to modify the BT resin which composed of 4,4′‐bismaleimidodiphenylmethane (BMI) and 2,2′‐bis(4‐cyanatophenyl)propane (BCE). The curing reaction between OMPS and BT resin was first investigated. It was found that OMPS accel…
0.98[(K0.4725Na0.4725Li0.055)NbO3]–0.02Ag(Ta1−xSbx)O3 lead-free piezoelectric ceramics were prepared by the conventional mixed-oxide method. The effects of the Sb content on the microstructure and the electrical properties of the ceramics were systematically investigated. The experimental results show that Sb strongly…
The conjugate residual with optimal trial vectors (CROP) algorithm is developed. In this algorithm, the optimal trial vectors of the iterations are used as basis vectors in the iterative subspace. For linear equations and nonlinear equations with a small-to-medium nonlinearity, the iterative subspace may be truncated…
A series of Au/MgO x −TiO 2 with various Mg/Ti molar ratios was prepared to study its catalytic activity for preferential oxidation of carbon monoxide in hydrogen-rich stream (PROX). An incipient wetness impregnation method was used to prepare the MgO x −TiO 2 support, using aqueous solutions of Mg(NO 3 ) 2 on TiO 2 c…
Highly ordered mesoporous Ni nanowires were synthesized by Ni electroless plating on the amine-functionalized SBA-15 (NH 2 −SBA-15) support, followed by removing the silica template with NaOH. The incorporation of amine groups into the pore channels and the subsequent activation of NH 2 −SBA-15 with PdCl 2 acetone sol…
Nanocomposites of Ru-doped cobalt−zirconia (20 wt % Co) were made by rapid and scalable flame spray pyrolysis (FSP). They were characterized by nitrogen adsorption, X-ray diffraction, electron microscopy, and X-ray photoelectron spectroscopy revealing that cobalt clusters were highly dispersed within the zirconia matr…
Gypsum (CaSO(4)center dot 2H(2)O) dehydration kinetics were investigated through energy dispersive X-ray diffraction (EDXD), under reduced pressure (100 Pa), in the temperature range 313-353 K. The process follows the JMAK (Johnson-Mehl-Avrami Kinetic) model. The fitting procedure of the Arrhenius expression provides…
Purpose The purpose of this paper is to investigate the inhibitive effect of the phosphite NaCo(H 2 PO 3 ) 3 •H 2 O (PhCo) for the corrosion of mild steel in HCl solutions. The study is another trial to find a mineral inhibitor for mild steel corrosion. Design/methodology/approach The inhibitory effect has been evalua…
The combination of fuel cells with conventional mechanical power generation technologies (heat engines) promotes effective transformation of the chemical energy of fuels into electrical work. The implementation of solid oxide fuel cells (SOFCs) within gas turbine systems powered by natural gas (methane) requires an in…
Intermediate temperature solid oxide fuel cells (SOFCs), which are highly tolerant against a thermal cycle, are studied by using the Ni–Fe porous alloy substrate prepared by an in situ reduction. It was found that Ni–Fe alloy exhibits high activity against anodic reaction and suitable compatibility with LaGaO3 electro…
In this paper, we report on the role of short-range disorder in stabilizing ferromagnetism in transition metal-doped compound semiconductors. While both theory and experiment have centered on dilute magnetic semiconductors where the magnetic ions substitute randomly for cation sites, there is increasing evidence that…
Abstract We report the synthesis of random polyampholyte brushes containing 2‐(dimethylamino)ethyl methacrylate (DMAEMA) and methacrylic acid (MAA). The preparation of polyampholyte brushes is performed by the “grafting from” strategy using surface‐initiated atom transfer radical polymerization (ATRP). The first step…
Abstract This article reports on a systematic study that was conducted to investigate the effects of die geometry (i.e., pressure and pressure drop rate) on the cell nucleation and growth behaviors of noncrosslinked high‐melt‐strength (HMS) polypropylene (PP) foams blown with supercritical CO 2 . The experimental resu…
Abstract The isothermal crystallization process of polycaprolactone/clay nanocomposites was studied at several temperatures. The effects of the clay type (modified and unmodified) and clay content were analyzed. Bulk crystallization was studied with differential scanning calorimetry and modeled with Avrami's equation.…
For possible future use in Photodynamic Therapy (PDT) and/or Photothermal Therapy (PTT) of cancer and screening of cancer cells a new type of ionic liquid photosensitizer -Cholinium-Purpurin-18 (Chol-Pu-18) - was synthesized and small gold (Au) nanoparticles, stabilized by this photosensitizer were prepared without ad…
Antireflection (AR) structures of polymer composed of an ordered array of holes with a tapered shape were formed by imprinting using a metal mold prepared from an anodic porous alumina. The metal molds (Ni) were prepared using an anodic porous alumina as a template and were used for the photoimprinting of polymers. Th…
Since the discovery of high-${T}_{c}$ ${\mathrm{LaO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}\mathrm{FeAs}$ and other such systems based on $\mathrm{FeAs}$ layers, several proposals have been made for the superconducting order parameter ${\ensuremath{\Delta}}_{\mathbf{k}}$, on both phenomenological and microscopic grounds.…
Abstract The natural frequencies ( f ) as a function of the length ( L ) of single, multi‐walled carbon nanotubes (CNTs) are measured using the electric‐field‐induced resonance method together with the “nanoknife” technique for cutting nanotubes to the desired length. The experimental f ‐ L data for short CNTs are fou…
The electronic structures of pure and Co 2+ -doped ZnO quantum dots (QDs) with sizes up to 300 atoms were investigated using three different density functional theory approximations: local spin density approximation (LSDA), gradient-corrected Perdew–Burke–Ernzerhof (PBE) and the hybrid PBE1 functionals with LANL2DZ ps…