797082.fig.006a
(a)
797082.fig.006b
(b)
797082.fig.006c
(c)
797082.fig.006d
(d)
797082.fig.006e
(e)
797082.fig.006f
(f)
Figure 6: FESEM images of the structures prepared with and for (a) 1 min, (b) 5 min, (c) 10 min, (d) 15 min, (e) 20 min, and (f) 30 min.