Figure 2.

SEM top-view and enlarged images. SEM top-view image of (a) ZnO and (b) ZnO:Y nanorods and enlarged images of (c) ZnO and (d) ZnO:Y nanorods.

Kung et al. Nanoscale Research Letters 2012 7:372   doi:10.1186/1556-276X-7-372
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