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SnO2-Core/SiOx-Shell Coaxial Whiskers with a Needle-Like Morphology
김현우,김효성,MesfinAbaynehKebede,나한길,양주찬 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.1
Needle-shaped structures of tin oxide (SnO2) were coated with a shell layer of SiOx via a sputtering method.The diameters of the SiOx-coated structures gradually became thinner, leading to the formation of sharp tips. The whiskers consisted of a crystalline SnO2 core surrounded by an amorphous SiOx shell.The photoluminescence (PL) spectrum with a Gaussian fitting exhibited yellow-green and orange light emission bands, and the overall shape and intensity of the PL spectrum were not changed by the SiOxcoating. The results of this study suggest that sputtering can be employed to achieve the layered growth of shell layers on a variety of nanostructures.