Materials Literature
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We have investigated CMOS photonics based on heterogeneous integration of SiGe/Ge and III-V semiconductors on Si, which gives us opportunities to enhance functionalities of Si photonics through their superior material properties for electronic-photonics integrated circuits.
Article presents theoretical and experimental analyses of possible effect of short-circuit forces on the transformer windings. The first part of the article is focused to the establishment and activity radial and axial forces during short circuit. It shows dimensions, direction and of course caused mechanical stress.…
Toward terahertz applications, we fabricated InGaAs layer on quartz glass by using direct-wafer-bonding technique and demonstrated InGaAs FETs performances to confirm the device fabrication process. Well-behaved FET characteristics on quartz glass have been achieved such as the maximum transconductance (gmmax) of 69.5…
The molecular structures, infrared spectra, heats of formation (HOFs), detonation properties, chemical and thermal stabilities of several tetrahydro-[1,4]dioxino[2,3-d:5,6-d′] diimidazole derivatives with different substituents were studied using DFT-B3LYP method. The properties of the compounds with different groups…
orchiopexy testicular volume (0.308ml) revealed a growing trend in mean 2.5 years follow-up but not yet catching up with normal testicular size.Conclusion: The pre-orchiopexy volumes of undescended testes are significantly smaller than normative values.The follow-up post-orchiopexy volumes of UDT actually increased in…
We fabricated organic photovoltaic cells with enhanced performance stability measured after temperature annealing at 100 °C and over a period of 24 days at room temperature. This improvement was achieved upon chemical cross-linking of the photo-active layer of the devices, combining a cross-linkable polymer and a full…
Blasting load is investigated using LS-DYNA software for the tunnel structure with different densities of expanded polystyrene (EPS) granule layers. Analysis of different points of pressure shows that the presence of EPS granule layers has beneficial effects on the attenuation of the stress wave, and the pressure deca…
In this study, polymer electrolytes derived from polymethyl methacrylate/50 % epoxidized natural rubber (PE) were successfully prepared. The effects of silicon dioxide (SiO2) (15 nm) and acid modified SiO2 (HCl-SiO2) (15 nm) on the film formation and ionic conductivity of polymer electrolytes were investigated. In sam…
Abstract The extraction-pyrolytic method has been applied to produce the ZnO and CdO-ZnO thin films on glass and quartz glass substrates. According to X-ray diffraction measurements, the ZnO and CdO phases have been produced with an average size of crystallites about 8–42 nm in the films. The thickness of the layers m…
Based on the first-principles method, the polarity inversion mechanism of Al-doped ZnO grown on sapphire (0001) substrate was investigated. This study revealed that the Al dopant tends to float on the surface of the buffer layer and leads to form ZnO nucleation islands of Zn-polarity without changing in-plane orientat…
Abstract The experiments have determined that, even close to the detonating underwater charge, the gas bubble and shock wave are sufficiently separated to produce individual effects on plane structures. These results allow evaluating the shock wave parameters and the effects of these two phenomena to be studied separa…
Magnetic gear which is capable of non-contact transfer torque has replaced mechanical gear and has advantages of high-efficiency and improved reliability. However, the magnetic gear has eddy current loss due to magnets unlike the mechanical gear. In addition, the magnetic gear has ferromagnetic pole pieces between two…
This paper is reviewing published data on a substantiation of using zirconium alloys with different phase composition in the strain-hardened condition as biocompatible materials. The recent studies of the impact of the structural state of the surface layers of zirconium alloys at their relaxation and corrosion resista…
In this work, non-segmented three-phase 12/10 magnetic topology is compared with a three-phase 12/8 design. While higher pole count often implies higher losses, the 12/10 functions entirely on short flux paths. 12/10 core loss implications are; therefore, not immediately clear when compared with 12/8. Pole count also…
In this research, the influence of structure on the tensile properties of single- walled carbon nanotubes (CNTs) is evaluated using molecular mechanics technique and finite element method. The effects of diameter, length and chiral angle on elastic modulus and Poisson’s ratio of armchair, zigzag and chiral structures…
Motor management relays can enhance protection by locking out a motor after a trip or a stop until the motor has cooled enough to restart the motor. This feature enhances motor protection because it insures the start will not cause the motor temperature to exceed the thermal damage curve. As with any protective relay…
Indium arsenide (InAs), with a low band gap of 0.35 eV, is used in long-wavelength photo-detectors, lasers, photovoltaic junctions and a host of other semiconductor devices. Very high Auger recombination coefficients (ranging from 10−27∼10−26cm6s−1) have been measured in this material. Here, we present first-principle…
Discharge in Long Air Gaps: Modelling and applications presents self-consistent predictive dynamic models of positive and negative discharges in long air gaps. Equivalent models are also derived to predict lightning parameters based on the similarities between long air gap discharges and lightning flashes. Macroscopic…
C-axis oriented single-crystalline monoclinic WO3 films were grown by molecular beam epitaxy, and studied their properties by fabricating solution-gate electrochromic devices in H2SO4 aqueous solution. These devices exhibited reversible change in the following three states; a colored state with low electrical resistiv…
We study directional dependent band gap evolutions and metal-insulator transitions (MITs) in model quantum wire systems within the spin-orbit density wave (SODW) model. The evolution of MIT is studied as a function of varying anisotropy between the intra-wire hopping ([Formula: see text]) and inter-wire hopping ([Form…