Abstract
We report here a simple two-step approach to produce ZnO nanowires, i.e. preparing Zn nanowires by evaporating Zn powder in a low vacuum and then oxidizing it to ZnO in air. This approach is very simple, catalyst free, and is capable of growing ZnO nanowires at low substrate temperatures; e.g. the substrate temperature for preparing Zn nanowires was ∼200°C, and that for the oxidation step was 305 ± 2°C. The ZnO nanowires synthesized by this approach exhibited intense photoluminescence (PL) at ∼380 nm and weak PL at ∼450 nm at room temperature. This study provides an alternative method for preparing metal oxide nanostructures at relatively low substrate temperatures.
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