Figure 5From: AFM, SEM and TEM Studies on Porous Anodic Aluminaa FESEM image of scratched PAA showing three different regions (I, II and III), b region I of the original PAA surface, c region II of the transverse section, which is parallel to the surface, and d region III of the title section. The PAA is fabricated in a mixture of 0.5 wt% oxalic acid and 3 wt% citric acid under 140 V and 10°C for 20 minBack to article page