Figure 2From: Fabrication of complete titania nanoporous structures via electrochemical anodization of Ti FESEM images of TiO 2 nanotubes fabricated in EG containing 0.5 wt% NH 4 F and 0.2 wt% H 2 O via first-step anodization: (a) top surface view, (b) bottom surface view, (c) cross-sectional view, and (d) top view of Ti-substrate after separation of TiO2 nanotubes.Back to article page