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. 2018 Sep 6;8(9):693. doi: 10.3390/nano8090693

Figure 8.

Figure 8

SEM images of (a) ZnO nanowire network and (b) ZnO/TiO2 nanowire network taken before (left) and after (right) PEC measurements. The insets schematically display the cross-section of each sample, indicating the distribution of the various materials—namely, gold (yellow), ZnO (blue), and TiO2 (pink).