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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 |
