Materials Literature
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A circular hole in a metal plane is covered by oblate spheroidal lenses of equal dimensions that are anti-isorefractive to each other and located on opposite sides of the hole. The structure is surrounded by free space and illuminated by an electric dipole located on the axis of symmetry of the structure and axially o…
We investigate the electromagnetic plane wave scattering by a cylinder coated by a magneto optical shell. In the long wavelength limit we show that a external static magnetic field can be used to tune the electric response of the system and then reduce the cylinder scattering cross section making it nearly transparent…
A facile process was developed to synthesize MoS2 nanospheres by a simple PVP assisted hydrothermal method. The samples were characterized by XRD, SEM and Electrochemical tests. SEM demonstrates that the obtained MoS2 has sphere-like morphology in the presence of surfactant PVP. Electrochemical measurements show that…
A rapid and sufficient osseointegrating functions is obviously essential to the patients who suffered the bone reconstruction period. In order to perfectly target this issue, a single-stage micro-arc treated (MAT) coating beneficial from its inherent porous morphologies with controllable pore sizes, strong adhesive fo…
The n-ZnO nanorods/p-Si nanowires heterojunction was fabricated by chemical method. The microstructure of the epitaxially grown ZnO nanorod was characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The photoluminescence of the nanostructure showed a typical UV emission…
An important contribution to charge transport in amorphous-chalcogenide materials used for manufacturing memory devices is due to the trap-to-trap transitions. Here the physics of the phenomenon is worked out as a combination of energy and space transitions, and its probability is expressed in closed form in terms of…
The paper aims at demonstration of reduction in residual stress, distortion and sensitisation in austenitic stainless steel pipe welds. The welding processes considered are Gas Tungsten Arc Welding (GTAW) and Shielded Metal Arc welding (SMAW) along with Hot wire GTAW with narrow gap welding technique. It was shown tha…
Summary form only given. Wireless power transfer over short distances is increasingly used to power implanted biomedical devices. A typical power transfer system consists of an external coil outside the body and an internal coil on the implanted device. The efficiency of the wireless power transfer depends on the Q of…
We have carried out a theoretical and computational study of the nonlinear optical conductance in terahertz to infrared regime of a single layer graphene p-n junction (GPNJ) with intra and inter band transition under moderate electric field. It is shown that the negative connectivity of single layer graphene can be en…
The precipitates in 850°C aging 2205 Duplex stainless steel were extracted by the method of carbon extraction replicas. The method makes precipitates disperse uniformly and the contrast between precipitates and matrix distinct. TEM(Transmission Electron Microscope), EDS(Energy Dispersive Spectrometer) and SEM (Scannin…
Stable TiO2 colloids composing of narrow size distrubuted anatase TiO2 nanocrystals were prepared using quaternary ammonium hydroxide, such as Me4NOH, Et4NOH and Bu4NOH, as catalyst. TEM and UV-Vis spectra measurements showed that the TiO2 colloids are quite stable in air or under ultrasound irradiation and the size o…
A nonlocal-gradient elasticity beam model with two independent gradient coefficients based on the classical nonlocal elasticity theory and strain gradient theory is used to study dynamic analysis of electrostatically actuated nanobeams. The numerical results show that the deflection response and frequency response of…
A non-equilibrium atmospheric pressure plasma was applied for the polymerization of the methacrylic monomers such as (2-hydroxyethyl methacrylate (HEMA), methacrylic acid (MAA) and butyl methacrylate (BMA)). These monomers were successfully polymerized with retaining the functional groups of ester or acid. The polymer…
This paper presents the processes of fabrication method in the selective area of growth Carbon Nanotubes (CNTs) on the substrate with an Interdigitated (IDE) electrodes pattern using resist AZ1500. The substrate used in this work was Gallium Phosphate with Chromium (0.021μm) and Platinum (0.11μm) as the metal layer. T…
In this paper, Multi-Walled Carbon Nanotubes were grown on a surface of a substrate that consists of a quartz piezoelectric substrate with titanium under layer and platinum electrodes. The Carbon Nanotubes (CNT) was grown using thermal CVD with Iron Nitrate as the catalyst. The growth of the carbon nanotubes was carri…
The electrochemical copolymerization of poly (N-vinylcarbazole) (PVK) and 3-methylthiophene (3MeT) was successfully achieved by direct anodic oxidation of monomer mixtures in dichloromethane containing 10% boron trifluoride diethyl etherate (BFEE) (by volume) and Bu4NBF4 (0.05 M). The structure of the copolymer was ch…
Zirconium Nitride (ZrN) thin films were prepared by dc reactive magnetron sputtering without an external substrate heating on silicon (100) wafer and glass slide. The as-deposited films obtained from different conditions and various films thickness was investigated for physical, optical and electrical properties. Firs…
This paper presents a proof of concept and equivalent circuit analysis of a cascade arrangement of tunable HV testing transformers intended for field use. The transformers use a partial core with air completing the flux path and are tuned to resonate with insulation capacitance. This minimises the power drawn from the…
We demonstrate a proto-type of a new class of THz metamaterial modulators employing metallic frequency selective surfaces (FSS) in conjunction with patterned graphene placed within the near field of FSS. Owing to the field enhancement in the near field, this device structure can potentially circumvent the limited cond…
In this paper, the repaglinide chitosan microsphere crosslinked with genipin was prepared by emulsification-chemical crosslinking method, and chitosan is used as coating materials, genipin as a crosslinking agent, repaglinide as active agent, span-80 as emulsifier. The prepared microspheres were also characterized by…