Figure 4.

Schematic diagram and photograph of ZnO NRA-based NG. (a) Schematic diagram of ZnO NRA-based NG with the Au-coated silica sphere array as a top electrode, (b) FE-SEM image of the grown ZnO NRAs on ITO/PET via the ED method, (c) photographic image of the fabricated sample, and (d) measured output signals in terms of current and voltage for the corresponding sample, in comparison with a background signal.

Ko et al. Nanoscale Research Letters 2013 8:511   doi:10.1186/1556-276X-8-511
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