Wettability of nanotextured metallic glass surfaces

The wettability of different nanotextured metallic glass surfaces is investigated. Wettability is quantified by the sessile drop technique using a distilled water droplet. It is demonstrated that hydrophilic–hydrophobic nature of the metallic glass surface can be controlled through nanotopography. The contact angle was found to increase from 70° for the flat metallic glass surface to 110° for a nanorod patterned surface. The difference in contact angle is explained in terms of the surface topography/roughness measured using atomic force microscopy.