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Figure 2 | Nanoscale Research Letters

Figure 2

From: Transformation of ZnO polycrystalline sheets into hexagon-like mesocrystalline ZnO rods (tubes) under ultrasonic vibration

Figure 2

ZnO sheet networks formed on an Al foil upon ultrasonication. Low (a), high (b) magnification SEM images of ZnO on Al foils after 20 min ultrasonication vibration, (c , d , e) SEM images of ZnO on Al foils after 50-min ultrasonication vibration, (f) SEM images of ZnO on Al foils after 50 min ultrasonication vibration, (g, h) cross-sectional SEM images of the sample before and after ultrasonic treatment.

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