762730.fig.004a
(a)
762730.fig.004b
(b)
Figure 4: (a) Lateral view FESEM images of titanium nanotubes grown from a 500 nm thick Ti thin film (sputtered onto SnO2:F coated glass at 500°C) anodized using a 0.5% HF electrolyte concentration at a potential of 12 V. (b) Integration of transparent nanotube array architecture into dye solar cell structure [38].