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Nowadays, reduced graphene oxide (rGO) has been used in many applications because the surface defect density can be controlled compared to pristine graphene. It has a band gap which make it easier to integrate with existing technologies. Though, a simple process and large scale device fabrication is needed to align the rGO during fabrication of device. In this work, dielectrophoresis (DEP) technique...
The purpose of this research is to evaluate the drain breakdown voltage of n-channel FD-SOI four-gate MOSFETs. Our approach is on the basis of three dimensional solution of Poisson's equation with proper boundary conditions for the surface potential and electrical field distribution. The model is extended to derive a model for the drain breakdown voltage which can predict the drain breakdown voltage...
An interdigitated electrode consisted of 50 pairs of 5 μm wide microelectrodes, separated by 5 μm gap has been fabricated using single layer positive photoresist lift-off process. The effect of UV exposure time to electrode width and photoresist overcut angle were optimized for the fabrication of an array interdigitated electrodes. The fabricated interdigitated electrode has been used to measure the...
A new design where ZnO nanotubes were grown on the antireflection (AR) layer coated on triple-junction (T-J) solar cell devices to enhance the light conversion efficiency. Compared to the bare T-J solar cells (without an AR layer), the performance of Si3N4 AR coated solar cell showed improvement. The sample with a layer of ZnO nanotubes grown in top of AR layer showed the lowest light reflection compared...
This experiment has been done to develop the process for synthesizing ZnO nanorods on FTO substrate using hydrothermal growth solution method with two different molarities and to fabricate Interdigital Transducer (IDT) fingers electrode for surface acoustic wave application. The FTO substrate was pre-coated with ZnO nanoparticle seed layer that was prepared by utilizing low cost and low temperature...
A simple analytical model for the surface potential, surface field distribution and lateral breakdown voltage of double-gate power MOSFETs has been proposed. The model is based on the analytical solution for the two-dimensional Poisson equation. From this solution, the reliance of breakdown voltage on the device parameters is also investigated. The validity of this model is demonstrated by comparison...
Indium doped ZnO nanowires were synthesized by carbothermal reduction method in a quartz tube. The nanowires were characterized by FESEM for morphological structure, the results showed a hexagonal structure with diameter around 40 - 100 nm, and lengths from hundreds of nanometers to a few microns. EDX was also used for materials composition and all the composition were found in the spectrum. XRD was...
This paper presents a low cost method for fabrication of microchannels on glass substrates for microfluidic devices applications. The channels with the depth up to 150um can be achieved by implementing a typical photoresist and wet etching process without any complicated deposition methods such as CVD, evaporation or other sophisticated techniques. In particular, AZ5214 photoresist is for the first...
Synthesis of copper oxide nanowires was done heating up copper wires in wet ambient air at 400 and 500degC. The existence of nanowires was confirmed by SEM images and EDX spectroscopy. Nanowires were not formed in nitrogen ambient. The diameters of synthesized nanowires are between 30 to 160 nm and lengths up to 39 mum. SEM image shows that CuO nanowires were formed on top of the oxide grains. Vapor-solid...
Presented is a molecular beam epitaxial pre-growth-annealing simulation. Simulation done using Monte Carlo method by taking consideration of GaAs decomposition, As desorption and absorption process from the surface. Surface roughness information can be deducted from the percentages of step-edge-site density. It is compared to the specular reflected beam from reflected high energy electron diffraction...
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