Figure 3.

SEM images of ZnO nanorod layers deposited by chemical spray pyrolysis. The layers (a, b, c) were deposited onto ITO/SGL substrate at growth temperature of 550°C (a) or 480°C (b, c) using aqueous (a, b) or alcoholic solutions (c) at similar spray rate (2.2 ml/min).

Kärber et al. Nanoscale Research Letters 2011 6:359   doi:10.1186/1556-276X-6-359
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