Table 1.
Static contact angle and surface energy values of the control (silicon wafer) and nanostructured surface
| Contact anglea (degrees) |
Surface energy componentsb (mJ m−2) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Substrate | θW | θG | θB | γTOT | γLW | γAB | γ+ | γ− |
| Control surface | 74.7 ± 1.8 | 66.8 ± 1.2 | 16.0 ± 0.8 | 33.2 | 26.0 | 7.1 | 1.2 | 10.6 |
| Nanostructured surface | 154.0 ± 2.3 | 139 ± 0.1 | 71.0 ± 1.8 | 18.8 | 14.8 | 3.9 | 2.6 | 1.5 |
a
θW, θG and θB: water, glycerol and benzene contact angles, respectively.
b
Surface energy components: Lifshitz–van der Waals (γLW), acid/base (γAB), electron acceptor (γ+) and electron donor (γ−) components.