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Figure 1 | Nanoscale Research Letters

Figure 1

From: Catalyst-free direct vapor-phase growth of Zn1−xCu x O micro-cross structures and their optical properties

Figure 1

SEM images of the as-fabricated samples taken at different positions. (a) A schematic drawing of the experimental setup. (b) A FE-SEM image of pure ZnO nanowires grown without Cu in the source. (c, d, e) FE-SEM images of Zn1−xCu x O samples located at positions C, B, A, respectively. Insets (b’) and (c’) show the corresponding high-magnification SEM images.

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