Figure 3.

SEM images of the ZnO nanocrystallites. (a) ZnO-0, (b) ZnO-5, (c) ZnO-10, and (d) ZnO-15. The insets in (a) and (c) are high-magnification images.

Miao et al. Nanoscale Research Letters 2013 8:431   doi:10.1186/1556-276X-8-431
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