Anodic Growth Behavior of TiO₂ Nanotube Arrays with Process Parameter Control

Figure 6

FE-SEM image of TiO₂ nanotube arrays with different concentration of DI water in electrolyte ((a) 2.2 vol%, (b) 5.3 vol%, and (c) 10.9 vol%) and their microstructure change (d).

(a)

(b)

(c)

(d)