Figure 5.

SEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.

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