Materials Literature
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A oxidação preferencial do CO (PROX) é o método mais adequado para a purificação de fluxos gasosos ricos em H2. Catalisadores de CuO/CeO2 têm sido desenvolvidos e apresentados como uma alternativa bastante promissora para a reação de oxidação preferencial do CO-PROX-CO. O objetivo deste trabalho é sintetizar catalisad…
This paper aims to develop an alternative novel technique for the high efficiency and ultrafine surface finishing of fused silica glass. A semi-fixed abrasive tool named MCF (magnetic compound fluid) wheel is produced by distributing a certain volume of MCF slurry uniformly over the whole circumference surface of ring…
An approach to significantly increase the external quantum efficiency (EQE) of organic light emitting diodes (OLEDs) in a highly simplified device structure is discussed in this paper.
The kinetics of the reaction of implanted atoms with the substrate in the presence of a cluster of implanted atoms is considered. It is shown that the reaction rate changes significantly due to cluster formation.
The thickness-dependent bipolar resistance-switching behavior was investigated for epitaxiallygrown Cr-doped SrTiO 3 (Cr-STO). All the pristine devices of different thickness showed polarity-independent symmetric current-voltage characteristic and the same space-charge-limited conduction mechanism. However, after a fo…
$La_{1-x}Sr_xMnO_3$ (LSM, $0{\leq}x{\leq}0.5$ ) powders as the air electrode for solid oxide fuel cell were synthesized by a glycine-nitrate combustion process. The powders were then examined by X-ray diffraction(XRD) and scanning electron microscopy (SEM). The as-formed powders were composed of very fine ash particle…
Long-wave studies of condensed phase matter have been successfully conducted at the Far-IR/THz beamline of Australian Synchrotron for a few years and applications range from nanotechnology, geology, renewable energy sources, forensics, biology, engineering and the environment. In this paper, we will present some of th…
This work presents an analysis of the influence of SiO 2 dielectric coverage of a Si substrate on the solar-cell efficiency of Si thin layers obtained by epitaxial lateral overgrowth (ELO). The layers were obtained by liquid phase epitaxy (LPE). All experiments were carried out under the following conditions: initial…
Current cutoff in lightning channels is an essential part of the lifecycle of all types of lightning flashes, and plays a pivotal role in the way a lightning flash develops. Yet it has not been seriously investigated, and is still poorly understood. We review the factors that affect changes in the current of leaders o…
Gold nano-island structures were fabricated on the light-illumination side of an organic solar cell device to investigate how the light scattering by localized surface plasmon resonance influences the quantum efficiency of an organic solar cell. A light beam from a solar simulator experiences multiple interaction proc…
This paper provides a polynomial approach applied to the Hodgdon model to describe the Hysteresis Loops of Silicon Iron (SiFe). The approach provides a closed-form expression for the branches of the Hysteresis Loop, which allows extensive parameter sweeps to adjust the parameters. Thus a huge number of variations can…
In this work the total energy calculations on the atomic geometry and chemisorption properties of Co(0001)/H surface are performed by using the density-functional theory in the approach of the projector-augmented wave (PAW) method. For a clean Co(0001) surface the atomic relaxations of the top three Co(0001) layers ar…
Organic thin-film transistors (TFTs) can usually be fabricated at temperatures of about 100 °C or less and thus on a variety of unconventional substrates, such as flexible plastics and paper. This makes organic TFTs potentially useful for the integration with organic light-emitting diodes (OLEDs) into bendable, rollab…
In this paper, the photoconductivity of silicon is characterized in measurement in two mm-wave bands: 110GHz - 170GHz and 220GHz - 325GHz. It is shown that in the mm-wave bands the silicon has a low loss under dark condition but becomes almost opaque under light illumination.
In this paper the results of development of the mathematical models of structures, which are modulated by pulse sequences multiple periodic functions are represent and the features of the electromagnetic field forming by such structures, namely the dielectric plate with complex laws of modulation of dielectric permitt…
The challenge of integration and moulding techniques is putting the electromagnetic design for manufacturability to the test when focusing on electrical machines for in-wheel application. 28-pole 30-slot permanent magnet synchronous machine (PMSM) is proposed and analysed for different arrangements for a stator magnet…
Polyoxometalates (POMs) possess an excellent property for electrochemical catalysis. A new hybrid complex containing polyoxometalate anions and layered double hydroxide (LDH) was prepared by assembly of Mg-Al LDH precursors in nitrate form with the 12-molybdophosphoric acid anions [PMo12O40]3−(PMo12). The properties o…
The light extraction efficiency of InGaN light-emitting diodes employing microsphere arrays with different refractive indices and diameters were studied, and the use of anatase TiO2microsphere arrays resulted in 2.4-times increase in light extraction efficiency.
Laser cladding technology was adopted to fabricate hydroxyapatite(HAP) and calcium phosphate compound coating according to the feature that a metallurgical bonding can be formed by laser cladding process. Compared with CO2laser, Nd-YAG laser has different wavelength(the former is 1.06μm and the latter is 10.06μm). Met…
The results of investigations of applicability of the method of high-frequency short-pulsed plasma-immersion ion implantation and (or) coating deposition using vacuum-arc and ablation plasma to conductive and dielectric substrates are presented. It is shown that ion implantation with the ion sputtering compensation by…