Study of ZnO-coated SnO_2 nanostructures synthesized by a two-step process

摘要

We investigated the influence of the ZnO coating on the properties of one-dimensional (1D) nanostructures of SnO_2. We have employed X-ray diffraction, scanning electron microscope, transmission electron microscope and photoluminescence (PL) spectroscopy to characterize both as-synthesized and ZnO-coated products. We observed that deposition process of ZnO by using an atomic layer deposition technique resulted in the SnO_2 core/ZnO shell structure. The photoluminescence of the ZnO-coated products exhibited broad bands in the UV and green region, suggesting a possible contribution of the emission from the ZnO outlayers.