Figure 4.

ZnO grown on as-received and annealed substrates without the Au catalyst. Tilted (45°) edge-on view SEM images of ZnO grown on c-plane sapphire substrates (a) as-received and annealed at (b) 1,200°C under identical growth conditions without the Au catalyst layer.

Weigand et al. Nanoscale Research Letters 2011 6:566   doi:10.1186/1556-276X-6-566
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