Materials Literature
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In this work we were observed epitaxial growth at the interface during the deposition of intrinsic a-Si:H layer on c-Si substrates by the hot wire chemical vapor deposition(HWCVD) technique. This crystallinity at the interface gets initiated during the deposition of the first few angstroms of a-Si:H on the c-Si wafer.…
This paper investigates the effect of a metamaterial superstrate on a single-feed circularly polarized microstrip patch antenna (SFCP-MPA) using CAD simulations. Simultaneous enhancement on antenna gain (up to 3dB), impedance bandwidth (BWZ) and axial ratio bandwidth (BWAR) are observed as well as multi-frequency oper…
Theoretical studies predict that the pattern of functional groups, or defects, will substantially affect the electrical and optical properties of low-dimensional systems such as single-walled carbon nanotubes (SWNTs) and graphene [1, 2]. Experimentally, it has been challenging to spatially control the defect generatio…
Recently, photo conductive properties of Graphene have been explored theoretically in [1] and experimentally in [2, 3]. In this paper we propose to build an optical bio sensor using Graphene Nano Ribbon (GNR). It is known that the band gap of GNR is controlled by the width of ribbon. The relation between the band gap…
To investigate the transport properties of the heterojunction formed by carbon nano tubes, and Silicon carbide nanotubes, the structures are designed using virtual nano lab. The heterojunction were first obtained through a geometry optimization processes. Based on the results of optimization, two-probe systems of the…
Recent progress in synthesis of large area mono- or few layer graphene on copper catalyst[1] has enabled various fascinating sensor, optical and electrical applications.[2-4] The idea for graphene to be employed for next generation nanoelectronics, however, require high quality films with wafer-scale uniformity and lo…
Bionics is a growing field that has the potential to drive engineering advances. This research focuses on investigating the characteristics of biological structures with illustrations of successful mechanical bionic designs. After natural selection, they exhibit remarkable optimized capabilities and igneous structures…
ZnO based LEDs are received great attention as it has wide band gap (~3.36 eV) and large exciton binding energy (~60 meV) at room temperature [1]. It is known that the basic components for LEDs are high quality p-type and n-type layers. The undoped ZnO exhibits intrinsic n-type conductivity and doping with III group e…
Large area graphene [1-3] is an emerging material and prime candidate for future high frequency electronics. In this work, large-area CVD graphene based radio-frequency transistors are integrated on both rigid and mechanically flexible/conformable substrates. The devices incorporate scaled ALD gate-dielectrics and the…
The impact of voltage quality on the operation of sensitive equipment is very critical. Dynamic Voltage Compensator (DVC) is the prime solution to mitigate the voltage quality problems. This paper investigates the compensation performance of a DVC connected to a distribution system, equipped with a simple control base…
In order to incorporate plasmonic nanoparticles into functional devices it is necessary to understand how surface plasmons couple as particles are arranged into ordered structures. Bottom-up assembly of chemically prepared nanoparticles facilities strong plasmon coupling due to short interparticle distances, but also…
The present study gives an important message that an MOS capacitor with HfLaTaO/HfSiO stacked dielectric and EOT of 1.0 nm can be demonstrated. Energy band diagram of MOS capacitor with Ta/HfLaTaO/HfSiO/P-Si(100) structure was determined by the measurement of Φηι of Ta deposited on HfLaTaO dielectric, the Egopt of HfL…
High carrier lifetime (>;1 μs) is essential to realize high power silicon carbide bipolar devices in order to obtain conductivity modulation in the thick voltage blocking layers [1]. To achieve low on-state resistance a carrier lifetime of >;5 μs is required for 10 kV blocking layers and >;20 μs for 20 kV blocking lay…
Backscatter systems are very good in imaging organic material. Ceramic was chosen to be studied to see whether true or not the backscatter systems not good for inorganic materials. Ceramics are used in the manufacture of knives. The blade of a ceramic knife will stay sharp for much longer than that of a steel knife, a…
Among the wide band gap semiconductor materials that have drawn a lot of attention recently, ZnO and SiC are seriously considered as materials for emerging electronics applications. ZnO has received attention for its application for UV light-emitters, transparent high power electronics, sensors, piezo electric transdu…
In recent years, there is an increased threat of explosive attacks worldwide, as the explosive - based weapons are easy to make, obtain and deploy. Detecting traces of explosives is a challenging task because of the low vapor pressures of most explosives [1]. Protecting against explosive-based terrorism can be achieve…
Chemically synthesized semiconductor nanocrystal quantum dots (NQDs) are promising candidates for gain media in micro/nano-lasers. The key advantage of using these NQDs is wide-tunability of emission wavelength across the visible and near IR spectrum [1], which is achieved by synthesizing NQDs of different sizes. One…
With its wide bandgap and high critical field, GaN is a promising material for high power electronics. To date, most GaN films have been grown on foreign substrates such as sapphire or SiC. Lattice mismatch between the film and substrate leads to a large number of threading dislocations (~109-1010cm-2). These defects…
The electromagnetic response of a multiwall carbon nanotube (MWNT) of small cross-sectional radius and finite length was theoretically studied in the terahertz and sub-terahertz regimes, by solving an integral equation. The polarizability of the MWNT peaks in the terahertz regime, depending on the length and the numbe…
One-dimensional nanocrystals and nanowires due to their high crystal quality, ease of growth, control and diversity in their composition have become promising building blocks in a number of technologies including photovoltaic, chemical sensing and light sources. One of the technological barriers to integrate such nano…