Atomic Layer Deposition of TiO₂ Nanocoatings on ZnO Nanowires for Improved Photocatalytic Stability

Figure 8

Linear sweep voltammetry under lit and dark conditions. (a) High-aspect ratio TiO₂@ZnO show significantly increased photocurrent (~1 order of magnitude over planar TiO₂ at 0 V vs. Ag/AgCl). (b) Planar 1000 cycle TiO₂ on silicon shows photocurrent ranging from ~0 to 8 μA. (c) Planar 20 cycle TiO₂ on silicon shows photoresponse, with photocurrent ranging from ~1 to 5 μA.

(a)

(b)

(c)