Figure 3.

Top-view and cross-sectional SEM images of final ZnO nanostructures. The nanostructures were grown at current densities of (a) -0.1 mA/cm2, (b) -0.5 mA/cm2, (c) -1.0 mA/cm2, (d) -1.5 mA/cm2, (e) -2.0 mA/cm2.

Aziz et al. Nanoscale Research Letters 2014 9:95   doi:10.1186/1556-276X-9-95
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