Table 3 Mean values of the nanowire dimensions, nanowire aspect ratio and array density for nanowire arrays on the bare and TiO2-coated FTO substrates
ZnO seed preparation methods | Diameter (nm) | Length (μm) | Nanowire aspect ratio | Density (×109 wires cm−2) |
|---|---|---|---|---|
Bare FTO substrates | ||||
Sample C1 | 170 | 11 | 65 | 1.4 |
Sample C2 | 165 | 11 | 67 | 1.5 |
Sample C3 | 160 | 10.6 | 66 | 1.6 |
TiO2-coated FTO | ||||
Sample D1 | 130 | 11 | 85 | 1.1 |
Sample D2 | 120 | 11.2 | 93 | 1.2 |
Sample D3 | 135 | 10.8 | 80 | 1.5 |