Materials Literature
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Abstract In this study the pressure distribution homogeneity on the catalytic surface is found to provide a simple and reliable fuel flow parameter that can be used to optimize the bipolar plate geometry and the PEM fuel cell performance. Finite element commercial ANSYS software was used to determine the fuel velocity…
ABSTRACT Cavitation bubbles, which always exist in the diesel jet leaving the nozzle and in diesel droplets breaking up from the jet as a result of supercavitation of the diesel within the injection nozzle, increase the instability of jet and droplets in part due to the two-phase mixture, while the mechanism of this e…
An all-dielectric, subwavelength grated based metal-oxide nano-hair structure for optical vortex beam generation has been presented in the paper. The nano-hair structure fabricated with alternating layers of alumina/hafnia on a fused silica substrate has a high diffraction efficiency of ~90% around the design waveleng…
Wie funktioniert der Wunderstoff? Der Mechanismus der Umwandlung von Sonnenlicht in Elektrizität in Perowskit-Solarzellen (PSCs) wurde seit den ersten Veröffentlichungen kontrovers diskutiert. Nach einer Reihe von Studien zeigt sich nun, dass PSCs als „siliciumartige“ Photovoltaikelemente betrachtet werden sollten, ni…
A custom code for molecular dynamics simulations has been designed to run on CUDA-enabled NVIDIA graphics processing units (GPUs). The double-precision code simulates multicomponent fluids, with intramolecular and intermolecular forces, coarse-grained and atomistic models, holonomic constraints, Nosé-Hoover thermostat…
Investigations of the phase diagram of biaxial liquid-crystal systems through analyses of general Hamiltonian models within the simplifications of mean-field theory (MFT), as well as by computer simulations based on microscopic models, are directed toward an appreciation of the role of the underlying molecular-level i…
The purpose of this article is to consider some recent developments in the area of the computational chemistry of metal–organic frameworks (MOFs), and more specifically on their crystal structure prediction and electronic structures. We intend here to illustrate how computational approaches might be powerful tool for…
Abstract A three-dimensional reconstruction method has been developed for voids in oriented strandboards made of mixed hardwood flakes. The method relies on the combination of X-ray computer tomography, image processing, and computer-aided design. The fractal dimension of void volume (FDVV) in the manufactured samples…
This study presents experimental results on the electrophoretic deposition (EPD) of chitosan/halloysite nanotube/titanium dioxide composite coatings based on the Taguchi design of experiments (DOE) approach. Taguchi array of L18 type with mixed levels of the control factor was used to study the influence of EPD parame…
Abstract Pseudomonas aeruginosa 42A2 is known to produce two hydroxy‐fatty acids, 10(S)‐hydroxy‐8(E)‐octadecenoic and 7,10(S,S)‐dihydroxy‐8(E)‐octadecenoic acids, when cultivated in a mineral medium using oleic acid as a single carbon source. These compounds were purified, 91 and 96 % respectively, to produce two new…
“…︁ Chemists are expected more and more to explain their contributions to the public. This could be straightforward since there is no new technology without improved materials, especially in fields of immense societal importance such as energy, health, water, or sustainability. Can’t these unsolved scientific and tech…
Abstract Single (200)‐oriented TiN thin films were deposited on quartz substrate by direct current (DC) magnetron reactive sputtering process at a wide range of substrate temperature from 200 to 600 °C. The effects of sputtering pressure and substrate temperature on the crystalline nature, morphology, electrical and o…
The addition of metallic precursors to flames evinces interest because of their potential ability to catalyze methane and ethanol combustion by means of supplemental gas-phase and surface reactions. A counterflow flame burner is used to spatially characterize and analyze the emissions from iron-pentacarbonyl-borne eth…
Molybdenum(VI) and tungsten(VI) dioxodiazide, MO2(N3)2 (M=Mo, W), were prepared through fluoride-azide exchange reactions between MO2F2 and Me3SiN3 in SO2 solution. In acetonitrile solution, the fluoride-azide exchange resulted in the isolation of the adducts MO2(N3)2⋅2 CH3CN. The subsequent reaction of MO2(N3)2 with…
In this paper, gasification potential of biomass residue was investigated using a laboratory scale throatless downdraft gasifier. Experimental results of groundnut shell was gasified in the throatless downdraft gasifier to produce a clean gas with a calorific value of around 5.92 MJ/Nm3 and a combustible fraction of 4…
Dirac electrons in solids show characteristic physical properties due to their linear dispersion relation and two-band nature. Although the transport phenomena of Dirac electrons in a normal state have intensively been studied, the transport phenomena in a superconducting state have not been fully understood. In parti…
High efficiency phosphor-converted white light-emitting diodes with superior color uniformity have been investigated. It is proposed that the cymbal-shaped phosphor structure can improve the uniformity of the angle-dependent correlated color temperature (CCT) and also increase the luminous intensity compared to the co…
A theoretical method is used to find, in an accurate and systematic way, all the possible equilibrium magnetic states of a finite-size one-dimensional chain of classical planar spins, interacting via ferromagnetic nearest-neighbor symmetric exchange and subjected to a uniaxial anisotropy which favors the orientation o…
Nanotechnology deals with structures of 100 nm and involves developing materials or devices within this range. Modern nanotechnology techniques lead to synthesize the metallic/ nonmetallic particles of nanosize dimensions to play a vital role in many different scienti c regimes and technological areas, particularly in…
Electrophoretic deposition (EPD) has traditionally been viewed as a thin film deposition technique for coating conductive surfaces. Recently, there have been reports of producing functional parts with EPD to near net shape, often containing gradients in material properties normal to the conductive deposition surface.…