Surface Wettability in Terms of Prominence and Depression of Diverse Microstructure and Their Sizes

Surface wettablility in terms of prominence and depression of diverse microstuructures and their sizes has been examined. We have proposed three different kinds of microstructures: square pillars, square pores, and hexagonal pores. The increase of pore fraction causes a decrease in the contact area between the water drops and microstructures, resulting in an increase of the contact angles. It was verified that the contact angles of the square pillar shape microstructures are higher than those of the square pore shape and hexagonal pore shape microstructures with the same pore fraction. Of the pore shape microstructures, the square pore shape microstructures had higher contact angles when compared to the honeycomb pore shape. However, it has been detected that the water drops are more stable on the hexagonal pore shape microstructures.