Materials Literature
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A lacunary Keggin polyoxometalate of K8[BW11O39H] · 13H2O was used as an effective and reusable catalyst for pyridine oxidation. Good yields of pyridine N-oxides were obtained in this catalytic system with hydrogen peroxide in water under mild conditions. [Supplementary materials are available for this article. Go to…
BaTiO3 is a well-known technologically important electroceramic material. In the present study high-energy ball-milling processing for producing distortion in the parent thermodynamically stable tetragonal BaTiO3 has been followed. This has produced nano-sized particles as well as a reactive surface. The intention of…
A laser-based technique for deep desulfurization of diesel and other hydrocarbon fuels by removal of dimethyldibenzothiophene (DMDBT), a persistent sulfur contaminant in fuel oils has been developed. We report a selective laser excitation of DMDBT in diesel and model compounds such as n-hexane in a reaction chamber un…
Hydraulic fracturing has become critical to unlock the enormous reserve of gas contained in large deposits of shales throughout the world. However, numerical models that were developed to design hydraulic fracturing treatments for conventional reservoirs are not applicable for the stimulation of gas shales. The work p…
A dual slant-placed electrodes thin-film photocatalytic (PC) reactor was proposed and successfully applied to degrade Amaranth. In this PC reactor, both the TiO2/Ti photoanode and the Cu cathode are slant-placed in the reaction chamber, and aqueous thin-film formed on the surface of both electrodes as wastewater flowe…
To optimise the performance of silicon diffusion barriers, TaN coatings were deposited through reactive magnetron sputtering at various N2/Ar flow ratios (4, 8, 12, 18 and 24%). The effects of the flow ratios on the structures, morphologies, corrosion and mechanical properties of the coatings were investigated in deta…
Based on the expansion and extension of the virial equation of state (EOS) of hard-sphere fluids solved by the Percus–Yevick integration equation, a universal cubic (UC) EOS is developed. The UC EOS is applied to model hard-sphere and Lennard-Jones (LJ) fluids, simple Ar and N2 liquids at low temperatures, and supercr…
Zirconium oxynitride (ZrNxOy) thin films were prepared by filtered cathodic vacuum arc technique using N2/O2 mixtures. The effect of N2/O2 ratios on the microstructure, optical and mechanical properties of films had been investigated. X-ray diffraction results showed that o-Zr3N4(O) phase was observed at low oxygen fl…
The aim was to analyse distribution rule of residual stress fields in a TC6 titanium alloy blade with multiple impacts and different spot overlapping ratios by comparing the numerical simulation and laser shock processing (LSP) experiments results. A dynamic model based on the finite element method was presented to si…
In the last decades several researchers devoted their studies to the optimal design problem of structures subjected to quasi-static loads as well as to suitable combinations of fixed and dynamic loads (Rozvany 1989). These works contain original formulations characterized by different chosen objective functions, diffe…
GaN-based blue light-emitting diodes (LEDs) with micro truncated hexagonal pyramid (THP) array were grown on selective-area Si-implanted GaN (SIG) templates. The GaN epitaxial layer regrown on the SIG templates exhibited selective growth and subsequent lateral growth to form the THP array. The observed selective-area…
In gold nanoparticle (GNP)-based colorimetric biosensors, the gradual color shift is often used to correlate with the concentration of target molecules, and therefore a UV-vis spectrometer is usually required for accurate quantification. Here, we present a critical coagulation concentration (CCC)-based salt titration…
Fiber-reinforced composites play an important role in enabling the industrial composites industry including automotive, pressure vessels etc. to meet ever increasingly aggressive fuel efficiency requirements. Modeling and analysis is often employed in composite development as a tool to achieve faster and more cost-eff…
We present a theory of effective electrostatic interactions in polydisperse suspensions of charged macroions, generalizing to mixtures a theory previously developed for monodisperse suspensions. Combining linear response theory with a random phase approximation for microion correlations, we coarse grain the microion d…
Electron-phonon coupling plays a central role for time-dependent phenomena in condensed matter, for example, in photoexcitation experiments. We use the continuous-time quantum Monte Carlo method to study the real-time evolution of charge and spin correlation functions of a Peierls insulator after a quench to a noninte…
Abstract Review: 391 refs.
Pure and Li(+)-doped Alq3 complexes were synthesized by simple precipitation method at room temperature, maintaining the stoichiometric ratio. These complexes were characterized by X-ray diffraction, ultraviolet-visible absorption and Fourier transform infrared and photoluminescence (PL) spectra. X-ray diffraction ana…
We report a method for controlling the orientations of conjugated polymers in the active layer of organic thin-film transistors (OTFTs) by annealing the film at the melting temperature in a vertically aligned multiwalled carbon nanotube (VA-CNT) template under various load pressures. Poly(3-hexylthiophene) [P3HT] mole…
Room-temperature ferromagnetism in proton-irradiated C60 fullerene is demonstrated. The ferromagnetism turns into diamagnetism intrinsic to the fullerene as the magnetic field increases above a critical field.
The influence of the cathode flow field properties on the water distribution and performance of direct methanol fuel cells (DMFCs) was studied. All measurements were performed with DMFC stack cells (A = 314.75 cm2). The local and temporal water distributions in the flow field channels during DMFC operation were visual…