Abstract
In this paper, the synthesis and characterization of uniform and dense CuO nanowires on fluorine-doped tin oxide (FTO) glass substrate are reported. The procedure simply involved the vapor–solid thermal oxidation growth process of CuO nanowires on FTO surface in the air flow. The sample was annealed in air within the temperature range 300–600°C for 1 h. The morphology and density of the CuO nanowires could be controlled by annealing temperature. The SEM image analysis indicates that the nanowires feature uniform size with aligned structures. The high-resolution transmission electron microscopy (HRTEM) result of individual CuO nanowires shows that the nanowires were single-crystalline, and the selected area diffraction pattern (SEAD) of the same sample shows that the nanowires grow along the (110) direction. The XRD analysis shows that CuO was the only product when the sample annealed at the temperature higher than 500°C.
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