Figure 6.

Typical SEM image of the needle-like ZnO arrays. (a) SEM image of the needle-like ZnO NW arrays; the scale bar in the inset is 500 nm. (b) Side-view SEM image of the needle-like ZnO NW arrays; the inset shows the top parts of the NW arrays.

Fang et al. Nanoscale Research Letters 2012 7:197   doi:10.1186/1556-276X-7-197
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