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Browsing by Author "Varma, S."

Browsing by Author "Varma, S."

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  • Carbon doped ZnO: Synthesis, characterization and interpretation 
    Mishra, D.K.; Mohapatra, J.; Sharma, M.K.; Chattarjee, R.; Singh, S.K.; Varma, S.; Behera, S.N.; Nayak, S.K.; Entel, P. (Journal Of Magnetism And Magnetic Materials, 329, 2013: 146-152)
    A novel thermal plasma in-flight technique has been adopted to synthesize nanocrystalline ZnO and carbon doped nanocrystalline ZnO matrix. Transmission electron microscopy (TEM) studies on these samples show the average ...
  • Facile synthesis of Super-paramagnetic Au @alpha-Fe2O3 hybrid nanoparticle and its assembly on graphene substrate for visible light Photo-catalysis 
    Sahoo, R.K.; Manna, A.K.; Das, A.; Mitra, A.; Mohapatra, M.; Sarangi, S.N.; Garg, P.; Deshpande, U.; Varma, S. (Applied Surface Science, 577, 2022: 151954)
    We report a simple interface modified strategy to self-assemble the as-synthesized Au@Fe2O3 nano structures by facile chemical synthesis route on graphene substrate (AFG) fo tau substrate mediated photo-catalytic dye ...
  • Ferromagnetism in ZnO single crystal 
    Mishra, D.K.; Kumar, P.; Sharma, M.K.; Das, J.; Singh, S.K.; Roul, B.K.; Varma, S.; Chatterjee, R.; Srinivasu, V.V.; Kanjilal, D. (Physica B-Condensed Matter, 405(12), 2010: 2659-2663)
    Room temperature ferromagnetism (RTFM) with a saturation magnetization (M(s)) of 0.025 emu/cm(3) has been observed in single crystal of zinc oxide (ZnO). The presence of intrinsic defects like zinc (Zn) interstitials and ...
  • Integrated X-ray photoelectron spectroscopy and DFT investigations of DNA adsorption on nanostructured SiOx surface 
    Mishra, I.; Majumder, S.; Joshi, S.R.; Subudhi, U.; Varma, S. (Chemical Physics, 562, 2022: 111665)
    The adsorption of DNA on SiOx and nanostructured-SiOx substrates has been investigated here in order to understand their binding behaviour. The XPS results indicate that DNA binding on nanostructured-SiOx introduces chemical ...
  • Structural and Microstructural Properties of Fused ZrO2-Mullites 
    Prusty, S.; Mishra, G.; Mohapatra, B.K.; Varma, S.; Singh, S.K.; Mishra, D.K. (Materials And Manufacturing Processes, 26(2), 2011: 282-287)
    Silimanite and zircon rich sea beach sand is taken with alumina powder for the synthesis of fused zirconia mullite (MUZ) composites by extended arc thermal plasma reactor. The bulk density value of fused MUZ (3.79g/cm3) ...
  • Synthesis of beta-SiC Powder from Bamboo Leaf in a DC Extended Thermal Plasma Reactor 
    Mohapatra, S.; Sakthivel, R.; Roy, G.S.; Varma, S.; Singh, S.K.; Mishra, D.K. (Materials And Manufacturing Processes, 26(11), 2011: 1362-1368)
    Fine silicon carbide powder was synthesized from bamboo leaf in a DC thermal plasma reactor through a single step process. With an applying current of 300amp and 50V voltages, the optimum duration of conversion of silica ...
  • Synthesis of sponge-like hydrophobic NiBi3 surface by 200 keV Ar ion implantation 
    Siva, V.; Datta, D.P.; Chatterjee, S.; Varma, S.; Kanjilal, D.; Sahoo, P.K. (Applied Surface Science, 410, 2017: 519-524)
    Sponge-like nanostructures develop under Ar-ion implantation of a Ni-Bi bilayer with increasing ion fluence at room temperature. The surface morphology features different stages of evolution as a function of ion fluence, ...
  • Unusual ferromagnetism in high purity ZnO sintered ceramics 
    Das, J.; Pradhan, S.K.; Mishra, D.K.; Sahu, D.R.; Sarangi, S.; Varma, S.; Nayak, B.B.; Huang, J.L.; Roul, B.K. (Materials Research Bulletin, 46(1), 2011: 42-47)
    We report our novel result regarding the observation of unusual but clean ferromagnetic (FM) signature at room temperature (RI) in high pure (99.999%) ZnO bulk ceramics processed by slow step sintering schedule (SSSS). All ...

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