Controlled Growth and Optical Properties of One-Dimensional ZnO Nanostructures on SnO2 Nanobelts

Various ZnO nanostructures, such as nanobelts, nanorods, and nanowires, have been grown on presynthesized SnO 2 nanobelts via a simple thermal evaporation of Zn powders, without using any catalysts, producing various heterostructures. The evaporation temperature is the critical experimental parameter for the formation of different morphologies of these nanostructures. Room-temperature photoluminescence spectra of the heterostructures show that the relative intensity of ultraviolet emission to the green band can be tuned by controlling the morphologies and sizes of the secondary-grown 1D ZnO nanostructures, suggesting that the nano-heterostructures of these nanostructures grown on SnO 2 nanobelts may have potential applications in nano-optoelectronic devices.