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2篇 您的检索式:作者名="J.Merline Shyla"
    题名 作者 年代 出处 被引量
1A Comparative Investigation on the Structural,Optical and Electrical Properties of SiO_2-Fe_3O_4 Core-Shell Nanostructures with Their Single Components显示文摘The SiO_2-Fe_3O_4 core-shell nanostructures were synthesized by sol-gel chemistry.The morphological features of the nanostructures were examined by field emission scanning electron microscopy which revealed the core-shell nature of the nanoparticles.X-ray diffraction studies evidenced the formation of SiO_2-Fe_3O_4 core-shell nanostructures with high degree of homogeneity.The elemental composition of the SiO_2-Fe_3O_4 core-shell nanostructures was determined by energy-dispersive X-ray spectroscopy analysis.Fourier transform infrared spectroscopy showed the Si-O-Fe stretching vibrations.On analysis of the optical properties with UV-Vis spectra and Tauc's plot,it was found that the band gap of SiO_2-Fe_3O_4 core-shell nanostructures diminished to 1.5 eV.Investigation of the electrical properties of the core-shell nanostructures using field-dependent conductivity measurements presented a significant increase in photoconductivity as compared to those of its single components,thereby rendering them as promising candidates for application as photoelectrodes in dye-sensitized solar cells.Neena Bachan A.Asha W.Jothi Jeyarani D.Arun Kumar J.Merline Shyla 2015Acta Metallurgica Sinica(English Letters)2015,28,11:3
2A Comparative Investigation of Dye-Sensitized Titanium Dioxide(TiO_2) Nanorods Grown on Indium Tin Oxide(ITO) Substrates by Direct and Seed-Mediated Hydrothermal Methods显示文摘We report a comparative investigation of the characteristics of modified TiO_2 nanorods grown on conducting indium tin oxide glass(ITO) substrates by two different hydrothermal methods: the direct method by which rutile TiO_2 nanorods were grown directly on plain ITO substrates and the seed-mediated one using which a thin film of anatase TiO_2 seed layer was laid down by spin coating and annealing prior to the growth of TiO_2 nanorods on it. Microstructural analysis of the samples using X-ray diffraction confirmed their rutile nature. The average crystallite size estimated using Scherrer's formula was found to fall in the range of 11–17 nm in both cases. Field emission scanning electron microscopy revealed the nanorod morphologies of a dandelion arrangement in the case of directly grown ones and a proper vertical orientation in the case of the seed-mediated method. UV–Vis spectroscopy analysis of both the samples exhibited redshifts with intense absorption of visible radiation, and the seed-mediated one was found to possess an increased bandgap. The transport nature of the samples was characterized by significant increase in both dark and photocurrents. The results show that the dark and photocurrent values of the directly grown TiO_2 nanorods were greater than those of the seed-mediated ones by *seven and five folds, respectively, and therefore, it could serve as efficient photoelectrodes in dye-sensitized solar cells.V.Chandrakala J.Annai Joseph Steffy Neena Bachan W.Jothi Jeyarani Tenzin Tenkyong J.Merline Shyla 2016Acta Metallurgica Sinica(English Letters)2016,29,5:0
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