Fabrication of TiO_𝟐 Nanotube Thin Films and Their Gas Sensing Properties

Figure 9

SEM images of nanoporous TiO₂ layer fabricated by the anodization of FCVA-deposited Ti thin film at different potentials: (a) 2 V, (b) 10 V, and (c) 20 V.

(a)

(b)

(c)