Effect of Applied Potential on the Formation of Self-Organized TiO_𝟐 Nanotube Arrays and Its Photoelectrochemical Response

Figure 2

(a) Current density against time plot for anodized Ti foils at 30 V for 30 minutes in 1 M glycerol electrolyte containing 0.5 wt% NH₄F, (b) schematic illustration to explain the formation of oxide layer (region I), and (c) schematic illustration to explain the dissolution of the barrier layer (region II).

(a)

(b)

(c)