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Figure 8 | Nanoscale Research Letters

Figure 8

From: Effects of Growth Conditions on Structural Properties of ZnO Nanostructures on Sapphire Substrate by Metal–Organic Chemical Vapor Deposition

Figure 8

SEM images of ZnO nanowall networks grown at different growth times ofa 25,b 30, andc 35 min.d Schematic illustration of the growth mechanism of ZnO nanowall networks grown on sapphire substrate without using any metal catalysts. Inset image shows the SEM result of nanowall networks grown at 60 min with the scale bar of 2.5 μm

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