Figure 6From: A catalyst-free growth of aluminum-doped ZnO nanorods by thermal evaporationComparative SEM images of undoped and Al doped ZnO nanowires. (a) 0 at.% Al (undoped), (b) 0.6 at.% Al, (c) 1.2 at.% Al, (d) 2.4 at.% Al, (e) 4.7 at.% Al, and (f) 11.3 at.% Al.Back to article page