Table 1. Contact Angle of the Titanium (Ti) Substrate, Flat Titanium (IV) Oxide (TiO2 Flat), and Titanium(IV) Oxide Nanotubes (TiO2 NT).
| sample | contact angle |
|---|---|
| Si | 60° |
| Ti | 68° |
| TiO2 flat | 87° |
| TiO2 NT | 4° |
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