Table 2.
Mean contact angle results for the superhydrophobic spot for pure water and different nanofluids, at a temperature of 20 °C.
| Fluid | Contact Angle Static (Advancing/Receding) θs (θa/θr) (°) |
Hysteresis Δθ (°) |
|---|---|---|
| Pure Water | 161.8(160.7/159.5) ± 1.8 | 1.2 ± 2.2 |
| Gold 0.1% | 160.6 (162.3/160.1) ± 0.9 | 2.2 ± 0.7 |
| Gold 0.5% | 158.1 (159.1/157.1) ± 5.7 | 2.0 ±1.2 |
| Silver 0.5% | 160.1 (160.6/156.5) ± 0.3 | 4.1 ± 1.0 |
| Silver 1% | 159.7(155.6/153.0) ± 1.6 | 2.6 ± 0.4 |
| Alumina 0.05% | 161.0 (152.9/151.8) ± 2.4 | 1.1 ± 1.0 |
| Aluminum 0.05% | 162.3(160.6/157.4) ± 1.7 | 3.1 ± 2.2 |