Indium-Arsenide (InAs) nanowires were grown in a high vacuum chemical beam epitaxy (CBE) unit on InAs(111) wafers substrates at 425-454 o C. Two types of nanogold were used as orientation catalyst, 40nm and 80nm.The measurements were performed using scanning electron microscopy showed that uniform nanowires. The nanowires orient vertically in the InAs nanowire scanning electron microscopy of an array 80nm diameter InAs nanowire with length is in the range 0.5-1 μm and of an array 40nm diameter with length is in the range 0.3--0.7 μm. The nanowire length with growth time shows that the linear increase of nanowires start to grow as soon as TMIn is available. The growth rate with temperature was studied.
The objective of this study is to perform physical / chemical characterization and to determine the corrosion resistance of calcium-phosphate (HA), TiN-based bio-ceramics and thin metal plating processed by a Ti-6Al-4V process. TiN and HA coating maximum power 150 watts. The presence of TiN200 Watt TiN s coating resulted in electrochemical corrosion. High current cathodic and passive anodic polarization shows an active surface. EIS shows the active behavior assumed by the active cathodic currents imposed. And HA on the sample surface, some noise was observed during both polarization and EIS tests.
The preparation films have good properties in electronic devices, with an energy gap decreasing from 3.4 to 3.1ev with the increase of AgNPs. The extinction coefficient has the maximum value in the visible region. The absorption coefficient shows the highest value at 300nm for rGO: AgNPs, and it The increase of silver nanoparticle concentration increases the extinction coefficient values, similar to absorption coefficient behavior.Graphene oxide synthesis by hummers method and reduction by the green chemical method using green tea. Preparation films with reduced graphene oxide (rGO) and Silver Nanoparticles (AgNPs) by a spin coating method. The preparation films and Nanomaterial characteristics with X-Ray diffraction D has a pea at 2 11.22 . While rGO has a wider pea at 2 26.2 . The (rGO +AgNPs) films have five obvious diffraction angles. In Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX), flaky sheet (rGO), and spherical (AgNPs) with Nanosize about ~20 nm, the peaks of EDX indicated the presence of Carbon, silver, and oxygen. The energy gap was calculated from the absorbance spectrum and seemed to decrease with increasing AgNPs.
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