Materials Literature
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High quality Ge and SixGe1-xfilms grown on Si substrates are attractive for a wide range of applications in optics, optoelectronics, and high efficiency solar cells. In this study, heteroepitaxial growth of Ge on nanostructured Si surfaces has been investigated. Thermally evaporated amorphous Ge films are vacuum-depos…
In Germany, the concept of dry interim storage of spent fuel in dual purpose metal casks is implemented, currently for periods of up to 40 years. The casks being used have an approved package design in accordance with the international transport regulations. The license for dry storage is granted on the German Atomic…
Abstract We optimized the emission spectrum of a quantum dot (QD) backlight and achieved ∼140% color gamut in CIE 1976 color space. The QD‐based LCD not only exhibits a wide color gamut but also improves the optical efficiency. Our systematic photometric analysis provides useful guidelines to further optimize the QD b…
The core-shell nanocomposite particles were prepared from acrylate monomers and octavinyl polyhedral oligomeric silsesquioxane (V-POSS) by emulsion polymerization. The structure and properties of emulsion and latex film were characterized by FT-IR, dynamic mechanical analysis (DMA) and TEM and laser particle diameter…
In this study, the influence of sodium dodecylbenzenesulfonate (SDBS) as additive on the morphology and nucleation mechanism for zinc electrodeposition on steel sheet was investigated using scanning electron microscopy (SEM) and potentiostatic electrochemical techniques. From the analysis of the chronoamperometric tra…
In this work, deep drawing experiments have been performed in order to study formability of Ti-6Al-4V alloy sheet at temperature ranging from room temperature to 4000C. It is found that below 1500C, formability of the material is very poor and above 1500C till 4000C, limiting draw ratio (LDR) is found to be 1.8 which…
In this work, we conducted Capacitance-Voltage (C-V) measurement on an inverted Metal-Oxide-Semiconductor (MOS) structure device with in-situ Boron (B) doped silicon quantum dot (QD) materials as the semiconductor layer. The highly conductive P++ Si (0.001-0.005 ohmic.cm) and thermal oxide worked as the metallic gate…
Liquid junction solar cells sensitized with quantum dots are promising structures as low cost and high efficiency photovoltaic devices. However, the reported short circuit current and open circuit voltage is lower than the theoretical values. The performance of these cells can be improved by the use of defect-free pho…
Selection and substantiation of the method for small area surface porosity measurement using ultrasonic vibrations and characteristics of the voltage on the piezoplate are considered. It is shown that the voltage magnitude on the piezoplate changes by 20% when the plate is set in contact with the skin, but the voltage…
A pseudo-Hammerstein model based identification scheme is proposed for rate-dependent hysteresis. In this strategy, the pseudo-Hammerstein model constituted by a nonlinear moving average model with exogenous inputs(NMAX) in series with an auto-regressive moving average(ARMA) model is presented to describe the dynamic…
The orthorhombic WO3 nanoplates were fabricated via a hydrothermal process, using HBF4 as the acid source. They were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-vis diffused reflectance spectroscopy (UV-Vis DRS), respectively. The WO3 nanoplates exhibited nice UV-light driven p…
Chitosan is capable to form films which may replace non-biodegradable food packaging plastics. Chitosan films need to be plasticized to enhance its properties. Chitosan films were incorporated with brown seaweed by casting chitosan solution and brown seaweed solution on Petri dishes and heated at 55 °C. The surface mo…
Neste trabalho, a técnica de viscosimetria foi utilizada para avaliar as características reológicas de suspensões preparadas com precursor vitrocerâmico do sistema LZSA (Li2O-ZrO2-SiO2-Al2O3). A partir da caracterização reológica, foi possível estabelecer condições composicionais adequadas de fração de sólidos, disper…
Scavenging energy from electromagnetic waves is one of the emerging areas for low-power energy harvesting. The wave is received by an antenna and is then rectified using nonlinear devices for generating required DC voltages. In addition to the traditional diodes other rectifying elements with different structures are…
The objective of this study is to evaluate the effect of hydrogen on the micro-and macro-strain of austenitic stainless steel using X-ray diffraction. When hydrogen is trapped in lattice sites, it can affect both the micro-and macro-strain. The micro-strain was evaluated through fitting profiles to measured X-ray diff…
Abstract We demonstrate a twist‐nematic liquid crystal cell integrated with a polymeric micro lens array. The device has the advantage of fast response time and low operating voltage. The lens is inserted into a Ultra High Definition (UHD) 2D/3D switchable display, after analyzing the crosstalk of the system, the doub…
A Novel Bio-Organic material, named Cooperative Binary Ionic (CBI) solid, based on chlorophyll type nano structures were self assembled onto ZnO and Bi2Te3Nano Wires (NWs) as an active layer of a new concept of thermoelectric-organic solar cell. The quality of the organic coating is extremely good and controlled in th…
The SCRAM steel was processed by warm deformation on Gleeble-3500 thermo-simulation machine. The effect of strain on the microstructures and mechanical properties of SCRAM steel was investigated. The results show that an increase in the strain can result in refining the martensitic laths, increasing the volume fractio…
A new oxidation reaction at ultralow temperature (-30°C) by bombardment of O2neutral beam can be enhanced at the extremely low activation energy, which can efficiently form a thin oxide film of all transition metal, such as platinum and ruthenium. Meanwhile, a novel neutral beam enhanced chemical etching for transitio…
The changes in the electronic structure and phase composition of porous silicon under action of pulsed ionic beams have been studied by X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge spectroscopy (XANES) using synchrotron radiation. The Si 2p and O 1s core photoemission spectra for different pho…