Figure 1

(a) Top-view and (b) 45° tilted-view of the vertically-aligned silicon nanowire arrays under SEM. (c) Top-view and (d) 45° tilted-view of the nanowire arrays after amorphous TiO₂ deposition. (e) Top-view and (f) 45° tilted-view of the nanowire arrays after anatase TiO₂ deposition.