Abstract: Graphene has attracted wide interest across a range of applications due to its electrical, mechanical and optical properties. The use of a low-cost, table-top chemical vapour deposition system to deposit few-layer graphene onto copper is reported in this work. Characterisation of the graphene is performed using Raman spectroscopy and atomic force microscopy. The results show that few-layer graphene can be deposited at 1000 °C using CH4 as a carbon precursor, and 5% H2, 95% N2 forming gas as a diluent. The effects of deposition temperature, deposition time, and forming gas addition on graphene film quality was studied experimentally. An increase in graphene quality was observed when forming gas was added during deposition.
Abstract: Now a days composite material plays an important role in many industrial applications due to their excellent mechanical properties. Presently researchers are making composite materials using various filler materials to characterize the wear behavior of the composite which is used as a machine component in various industrial applications and in machine house hold articles for daily use to highly sophisticated applications. This is due to the proven fact that composite materials acquire higher strength to weight ratio. In this investigation Nano composites of E-Glass fiber/Multi walled carbon nano tube were prepared by the technique of hand layup. The glass fiber used for current investigation is E-glass fiber bi-directional of 45 degree orientation. The composite material samples were prepared in the form of a plate with a thickness of 4 mm. The fabricated composite materials were cut into analogous profiles as per ASTM for tensile and flexural testing analysis. This investigation reveals that the growth of Multi Walled Carbon Nano Tube (MWCNT) particles improves considerably the mechanical properties even if the fabrication is done by manual method like the technique of hand layup.
Abstract: Polymer composite with reinforced fiber is a remarkable development in the field of engineering materials. The applications of composite materials have significantly increased in Defense, Aeronautical and Automobiles because of its specific modulus and high strength characteristics. In composite material development, nano particles reinforcement and nano fiber reinforcement are the most recent methods developed. In this research electrospun carbon nanofiber reinforced mat with polymer epoxy resin composites was prepared. X-ray diffraction, scanning electron microscope and ultrasonic scanning were used to study the morphology and the defect on the specimens for analyzing the structural conditions of the samples for determining the mechanical properties. The result clearly indicates that the Carbon Nanofiber (CNF)/ Polyvinyl Alcohol (PVA) mat improves the flexural strength of the epoxy resin and that 0.015% CNF in PVA gives a better mechanical strength.
Abstract: A simple and low temperature approach has been used for the deposition of manganese oxide (MnO2) film and nanoparticles on silicon nanowires (SiNWs). Firstly, SiNWs were grown using hot wire chemical vapour process (HWCVP) technique via Vapor-Liquid-Solid (VLS) mechanism using Sn as a catalyst and then electrophoretic deposition method (EPD) was used to deposit MnO2 on them. Since SiNWs have good electron transportation and high aspect ratio, the role of SiNWs is thus for improving the electrical conduction and the surface area for MnO2 for its application in a desired form. First the deposition parameters were optimized on a transparent conductive oxide (TCO) coated glass substrate to control the thickness of the MnO2 film and then it was synthesized on SiNWs. The deposition of MnO2 has been confirmed by FEG-SEM and EDX. This structure of MnO2-SiNWs could be useful for various applications.