Table 1 Static contact angles of dyed water and ethylene glycol on different surfaces
| Surface types | Static contact angles (°) | |
|---|---|---|
| Dyed water | Ethylene glycol | |
| Air DBD processed PMMA | 44.35 | 25.25 |
| Nitrogen plasma-treated PMMA | 52.13 | 47.70 |
| Undoped DLC-coated PMMA | 72.66 | 20.26 |
| Control PMMA | 79.97 | 48.77 |
| Si-doped DLC-coated PMMA | 81.25 | 39.27 |