Materials Literature
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A diode pumped CW Erbium (Er)-doped Zr-Ba-La-Al-Na (ZBLAN) fluoride glass fiber laser operating at 2.78 μm was demonstrated using a guided mode resonance filter (GMRF) as an external cavity mirror.
Experimental methods for aluminum nitride rate increase at combustion of aluminium nanopowder in air, such as increase of aluminum nanopowder sample mass, air volume limitation, etc. are examined in the paper. The influence of infrared radiation on aluminium nanopowder and its mixtures samples on aluminum and titanium…
Epitaxial-like colloidal quantum dot films are demonstrated as potential single material system for red, green, and blue lasing. These prospects derive in part from the access to single exciton gain in the optically dense films.
We discuss an analytic expression for the spectral shape of propagating surface plasmon polaritons (SPPs). Based on Drude's model, the SPP spectral deformation, determined by differences in the intensity decay length, has been confirmed.
Under white light illumination, amorphous indium–gallium–zinc oxide (a-IGZO)-based thin-film transistors (TFTs) showed a large negative shift of threshold voltage of more than -15 V depending on the process conditions. We investigated the influences of both gate bias and white light illumination on device properties o…
In the initial stage of rheocasting-rolling of semi-solid AZ91D magnesium alloy, the semi-solid slurry was injected into the casting mouth. The whole process was investigated by the VOF model in this paper. The influents of the geometric shapes of casting mouth on temperature field and flow field in casting mouth was…
Back Cover: HepG2 hepatocarcinoma cells take up water soluble homo-glycopolymers as well as nanoparticles of polystyrene block copolymers in a sugar-type dependent manner. Preferential internalization of green-fluorescent, galactosylated homopolymers and nanoparticles (20 nm in diameter) could be observed by confocal…
The transduction of resonant mechanical vibrations induced in a single walled carbon nanotube (CNT) with application to frequency and signal detection is investigated in this work. The CNT, clamped between two metallic source and drain junctions and suspended in a trench above a gate electrode behaves as a conducting…
Neste trabalho foi realizado um estudo das propriedades elétricas de blocos varistores à base de SnO2. Foram avaliadas a não linearidade destas cerâmicas por meio da caracterização tensão-corrente, bem como a altura, largura e os portadores de cargas por espectroscopia de impedância, além das energias de ativação. Os…
A cast iron/low carbon steel sandwich-structured bimetal fabricated through composite casting, followed by hot rolling and hot compression (40% reduction) in a vacuum, and water quenched using Gleeble 3500 thermomechanical simulator. The microstructure of a predominantly martensitic structure is transferred to a matri…
The article presents simulation work to model puncture impact damage of woven fabric with multitude of yarn frictions settings. Woven fabric models were developed with ABAQUS finite element analysis software package. Large scale woven fabric models consisting of 112 yarns in both warp and weft direction were developed…
High-resolution imaging of an object smaller than the wavelength requires that evanescent near-field information be transmitted from the vicinity of the object to the plane in which the image is formed, which is usually in the far-field region. Here, we demonstrate the well-known Non-radiative Dielectric Waveguide for…
The work describes experimental results on Bi3+luminescence in yttrium oxide (YO) and yttrium-aluminum oxides namely Y3Al5O12(YAG), YAlO3(YAP) and Y4Al2O9(YAM) in the form of nanopowders synthesized by sol-gel method.
Single-phase ZnAl2O4 spinel has been prepared by a novel simple route using layered double hydroxide as a precursor. ZnAl2O4 spinel is directly obtained by calcination of zinc aluminum layered double hydroxide (Zn/Al molar radio is 0.5) without further chemical treatment. The key feature of this method is that it affo…
This paper proposes an approach to determining classification of partial discharge (PD) events in Gas Insulated Load Break Switches (GILBS). Discrete wavelet transform (DWT) is employed to suppress noises of measured signals by the high-frequency current transformer (HFCT). Three kinds of different defects are designe…
TiO2nanopowder (0-20 w%) has been introduced in the PMMA matrix using the single step of sonication method to produce the PMMA/TiO2nanocomposite films in the free standing form. The PMMA and TiO2solution were mixed in the sonication bath. The effects on Tg, thermal degradation and also modulus of the PMMA/TiO2nanocomp…
We analyze a two-dimensional planar microstrip antenna, excited by a plane wave, and propose its operation as a low-profile receiving antenna, by adjusting the parameters of its cloaking superstrate. A semi-analytic integral equation method is developed to determine the antenna's scattering characteristics. It is show…
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Echo-contrast agent microbubbles in blood can sometimes penetrate a clot that is blocking bulk flow in the vessel. When ultrasound is applied for the purpose of sonothrombolysis, microbubbles can be forced by acoustic radiation force into the clot matrix. To monitor the extent of this penetration, a 20 MHz pulsed Dopp…
Dear colleagues, We are pleased to introduce you to this Special Issue of physica status solidi (a), focussed on fundamental and applied science and technology of diamond and nanodiamond materials. This special issue aims at providing a brief but hopefully broad overview of those topics that are today at the centre of…