Abstract
SnO2 nanowires were grown on a TiO2/ATO (antimony doped tin dioxide) glass substrate by thermal evaporation at ∼750 °C without any source material (tin oxide powder or metal tin). A SnO2 layer was melted and evaporated from ATO glass substrate. Hydrogen served as a reductant, causing vapor species of SnO and O2 to be formed from the SnO2 layer. The patterned TiO2 layer provided sites with a high surface energy such that the selected-area growth of SnO2 nanowires was achieved. A growth model, based on a vapor–liquid–solid mechanism, for interpreting the growth of the nanowires in our work is proposed. Field emission scanning electron microscopy (FESEM), high-resolution transmission emission microscopy (HRTEM), and cathodoluminescence (CL) were used to characterize the nanowires.
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