The properties of crystalline materials are strongly dependent on their structure/composition in the short-, medium-, and long-range orders. In this regard, structural characterization is of interest to both theorists and experimentalists in the development of various materials with highly tailored properties . The wettability of a material is directly related to the interaction between its surface and liquid. At a lower wettability, the angle of contact with the surface is larger . Images of the contact angles are shown in Fig. (c), while their values are listed in Table . The surfaces of both ZnO and ZnS coatings are naturally hydrophilic. To investigate the effect of the film thickness on the optical properties of the ZnS and ZnO tissues, optical transmittance measurements at different thicknesses were performed.