Photoirradiation Caused Controllable Wettability Switching of Sputtered Highly Aligned c-Axis-Oriented Zinc Oxide Columnar Films

Figure 7

Time dependence of water contact angles (CAs) for the ZnO thin films deposited at 100 W under ultraviolet (UV) photoirradiation with the light wavelength of 365 nm. Inset showed the corresponding water CA images accompanied with the measured values of the ZnO (0002) columnar films.