Figure 4From: Effects of substrate annealing on the gold-catalyzed growth of ZnO nanostructures 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.Back to article page