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. 2020 Jul 18;6(7):e04458. doi: 10.1016/j.heliyon.2020.e04458

Figure 4.

Figure 4

Top-view and cross-sectional view (insert) SEM images of ZnO nanorods grown at (a) 60 °C; (b) 70 °C; (c) 80 °C; (d) 90 °C. Histogram inserts in each SEM image represent nanorods diameter distribution.