Materials Literature
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Through first-principles electronic-structure calculations, we suggest that because the transitionmetal (TM)-d levels are located deep within the conduction band, TM (M = Hf, Zr, or Ti)-doped amorphous In 2 O 3 (a-In 2 O 3 ) can provide shallow donors, even though the effective mass of the a-In 2 O 3 is slightly incre…
AVANT PROPOSCe rapport contient les résultats de relevés de traces d'érosion faits pendant les mois d'avril et de mai 2012 dans le bassin versant La Chevrotière dans le cadre du projet « Cartographie d'érosion hydrique du sol par télédétection satellitaire à très haute résolution spatiale -application aux terres agric…
Interaction of a single chemically active bubble in water with acoustic waves is numerically studied within the framework of the model of a two-dimensional unsteady flow of an ideal compressible medium. The boundaries between the phases are explicitly identified. It is demonstrated that bubble explosion initiation can…
The minibands and minigaps in the transmission bands of one-dimensional photonic crystals have been studied through Bloch’s theorem, the tight-binding method and calculations based on the transfer matrix method. The minigap depths are dependent on the resonance intensity within the layers of one-dimensional photonic c…
This paper presents the Perfectly Matched Layers (PMLs) in the framework of transformation optics as a complex-valued change of coordinates. PMLs provide the suitable operator extensions required for the quasi-mode analysis of open problems. Leaky modes in open dielectric waveguides and spectral analysis of diffractio…
The possibility is shown to synthesize a nanodispersed powder in the system “carbon-nitrogen” in a hypervelocity electrical discharge plasma jet generated by a coaxial magnetoplasma accelerator (CMPA). The plasma shot is provided in the pressurized chamber filled with the gaseous nitrogen. Up to 1 gram of black powder…
In this work, we report an optimisation of ultrasonic irradiation time on the synthesis of ZnO thin films to the photoluminescence (PL), surface morphologies and structural properties of ZnO on gold-seeded Si substrate. Surface morphology of the thin films was studied using field emission scanning electron microscope…
High charge state heavy metal ion beams have been formed by high power microwave heating of vacuum arc plasma confined in magnetic traps. Two types of magnetic traps were investigated, one a simple mirror configuration and the other a cusp configuration with inherent “minimum-B” structure. Pulsed high power (>;100 kW)…
TiO2 nanotubes has aroused widespread attention due to its novel optoelectronics, catalysis, gas sensing performance in solar cells, TiO2 is an important functional materials,photocatalysis, environmental purification, gas sensors have potential applications.Reviewed the latest research progress and development status…
We review our recent experimental progress regarding optical metamaterials and transformation optics. The emphasis lies on three-dimensional architectures including invisibility cloaks and potential applications such as broadband circular polarizers and metamaterial metal-based bolometers.
with DLC coating spinning rings as the subject, focuses on the mechanism of damage on spinning ring track caused by textile fiber fabrics adhering to spinning ring surface and relevant adhesive wear and fatigue wear. Aiming at its failure, single DLC coating is substituted by Ti-DLC coating spinning rings. The process…
In this paper, we present analytical calculations and numerical simulations of the vertical component of the electric field close to a rocket-triggered lightning site during the ascent of the rocket and prior to the lightning initiation, taking into account the corona layer around the wire. In the analysis, the backgr…
The (1−x)BaTiO3-x{Na,K}0.5Bi0.5TiO3solid solutions have been synthesized by solid-state reaction technique. The parameters of the crystal structure of the ceramic samples were determined by means of Rietveld full-profile X-ray analysis. With increasing x, the values of ρmaxand ρminincrease due to the growth of potenti…
Abstract Robuste, langlebige Quantenspeicher sind unerlässlich für zukünftige Anwendungen der Quanteninformation, zum Beispiel für absolut betrugssichere Kreditkarten und fälschungssichere Ausweise. Allerdings stören bereits schwächste Umwelteinflüsse einen Quantenzustand und führen zu dessen schneller Zerstörung. Ein…
Classical simulations of charge carrier motion within interconnected semiconductor nanoparticles help to characterize the effect of the connectivity between neighboring nanoparticles and of their size on the overall high-frequency photoconductivity spectrum of the nanostructure.
The insulators coated with super-hydrophobic coating have good performance of anti-icing. But the super-hydrophobic coating can't completely preventing ice accumulation, especially the soft rime. In order to solve this problem, a kind of semiconductor coating was prepared in this paper,and then the super-hydrophobic c…
2D-Planar and 3D-cylindrical nanoporous anodic aluminium oxide was fabricated by anodization of high purity aluminium. High yield of alumina nanowires were prepared from planar and cylindrical nanoporous aluminium oxide film by chemical etching in H3PO4aqueous. The tensile stress at the aluminium oxide/aluminium inter…
T-joints between fiber reinforced composite material components are widely used in ship building. They are the weak positions in ship structure on mechanical properties aspect. Through experiments, the effects of structure size and technics on joint deformation and destructive strength were researched. Destructive str…
We discuss how a three-level system can be used to change the frequency-dependent magnetic permeability of a dense atomic gas to be significantly different from 1. The results show that a negative permittivity and permeability simultaneously with transparent propagation of the electric part of the probe filed can be o…
We synthesized various sizes of nanocrystalline yttria-stabilized zirconia (YSZ) for an electrolyte in solid-oxide fuel cell (SOFC) by using the sol-gel method. The surface morphology and the thermo-mechanical properties for different nano-grain sizes were characterized. The YSZ grains were found to grow non-linearly,…