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Figure 2 | Nanoscale Research Letters

Figure 2

From: Homoepitaxial regrowth habits of ZnO nanowire arrays

Figure 2

Sample A. SEM images of ZnO NW arrays after the (a) first-, (b) second-, and (c) fourth-time growths. The growth time is 10 min for each cycle. NW bundling is observed in both (b) and (c). A zoomed-in image of the bundle is shown in the inset of (b). The scale bar is 1 μm. (d) Statistic diameter distribution of ZnO NWs after the first- and second-time growths. (e) A possible mechanism that leads to bundling process of ZnO NWs during the second-time growth.

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