The phrase "average contact angle" is correct and usable in written English.
It can be used in scientific or technical contexts, particularly in discussions related to surface chemistry or material science.
Example: "The average contact angle measured for the hydrophobic surface was found to be 120 degrees."
Alternatives: "mean contact angle" or "typical contact angle".
The average contact angle is 54°.
The freshly emeried titanium surface showed an average contact angle of 49° ± 5.
Its average contact angle recovered by only 7°, and the steady water flux was about 30 L m−2 h−1, far higher than the untreated ones.
When prepared with a smaller pore size (500 nm), the array of nano-needles showed a lower average contact angle of about 145°.
Because of the water evaporation, the average contact angle decreases with time leading to a decrease in the frequency shift (phase 3).
Nano-needle arrays prepared from the honeycomb film with a pore size of 3.5 μm showed an average contact angle of 150°, which means super-hydrophobicity (Figure 4b).
As shown in Fig. S1, the average contact angles of the PE, PET, PVC, and PI films were 86°, 81°, 78°, and 52°, respectively.
Additionally, we showed that the average contact angles and the contact angles measured outside porous media cannot sufficiently characterise the wettability in pore-network models.
Right after functionalization on day 0, the average contact angles of GPTMS and APTES surfaces were 107.4 ± 0.1° and 97.4 ± 1.7°, respectively (p < 0.002).
After 2 d in Milli-Q water, the average contact angles of GPTMS and APTES surfaces were 67.8 ± 3.3° and 100.6 ± 0.4° (p < 0.005), respectively, while these angles were 99.9 ± 5.7° and 102.1 ± 1.1° (p > 0.05), respectively, after 2 d in anhydrous methanol (Supporting Information, Figure S6).
The results of averaged contact angle measurements and their standard deviations are shown in Table 2.
