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Figure 5 | Nanoscale Research Letters

Figure 5

From: AFM, SEM and TEM Studies on Porous Anodic Alumina

Figure 5

a 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 min

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