Conference Papers

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Author: search.filters.author.Prabukumar, C.Has files: No

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    Characterization of ZnO films produced by thermal evaporation and oxidation
    (Trans Tech Publications Ltd ttp@transtec.ch, 2015) Prabukumar, C.; Jayalakshmi, M.; Bhat, K.
    ZnO nanostructures such as nanowires and nanorods are beneficial in solar energy harvesting because they provide a structure with a large surface area. Also, they provide a direct pathway to electron transportation, eliminating the scope for grain boundary scattering. In this investigation, thin ZnO films were prepared by thermal evaporation of the Zn metal, which was followed by oxidation. Evaporation parameters and oxidation temperatures were fixed. The oxidation duration was the variable. The effect of oxidation time, on the morphology and structural properties were studied by using scanning electron microscopy and X-ray diffractometry. The study shows that with increase in oxidation time, the morphology changed to nanorods from initial flake morphology. As a function of oxidation time, the crystallinity and texture became more dominant. By using, I-V characteristic curves, it was found that the morphology changes alter the surface electrical conductivity of the prepared ZnO films. © (2015) Trans Tech Publications, Switzerland.
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    Purification of Silver Nanowires Synthesised by Polyol Method
    (Elsevier Ltd, 2018) Prabukumar, C.; Bhat, K.U.
    The mesh-based silver nanowires (Ag NWs) films are considered to be a good alternative to high-cost, brittle ITO as a transparent conductive electrode (TCE) for the sustainable flexible electronic devices. The polyol synthesis method is the common method to synthesis Ag NWs wherein Ag particles are also produced as a by-product. The present work used decantation combined with solvent-aid precipitation approach to remove silver particles from the Ag NWs suspension to produce quality Ag NWs based TCE. The synthesised and purified products were characterized by using Scanning electron microscopy, UV-Visible spectroscopy and X-ray diffractometry. This method proved to be a simpler and more effective one compared to filtration and centrifugation method as it yields more NWs against the particles. © 2018 Elsevier Ltd.
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    Effect of solvent on the morphology of MoS2 nanosheets prepared by ultrasonication-assisted exfoliation
    (American Institute of Physics Inc. subs@aip.org, 2018) Prabukumar, C.; Mohamed, M.M.J.; Bhat, D.K.; Bhat, K.U.
    The MoS2 nanosheets are prepared via liquid-phase exfoliation route. Bulk MoS2 powder is exfoliated by ultrasonication-assisted method with the aid of different solvents. The effect of solvents used on the morphology of the MoS2 nanosheets is investigated. The exfoliated material is analysed by using scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy and X-ray diffractometry. The MoS2 nanosheets exfoliated by using NMP-water mixture showed the better morphology than that exfoliated with the other solvent mixtures. © 2018 Author(s).