| 1 | A 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 | 2015 | Acta Metallurgica Sinica(English Letters)2015，28，11： | 3 |
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