Figure 4.

Low- and high-magnification FESEM images of the samples. Low-magnification (a1, b1, c1, d1, e1, and f1) and high-magnification (a2, b2, c2, d2, e2, and f2) FESEM images of samples A (a1, a2), B (b1, b2), C (c1, c2), D (d1, d2), E (e1, e2), and F (f1, f2).

Zhong et al. Nanoscale Research Letters 2013 8:451   doi:10.1186/1556-276X-8-451
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