189279.fig.002a
(a)
189279.fig.002b
(b)
189279.fig.002c
(c)
189279.fig.002d
(d)
Figure 2: Cross-sectional images of (a) as-grown, (b) oxygen-annealed, (c) air-annealed, and (d) vacuum-annealed Al-doped ZnO nanorod arrays.