We report on periodic, homogenous nanoripples fabricated on stainless steel (SS), copper (Cu) and aluminium (Al) substrates using an ytterbium pulsed femtosecond laser. These structures called Laser Induced Periodic Surface Structures (LIPSS) are processed at a relatively high-speed allowing us to fabricate quasi regular nanoripples in a short time over large areas. This paper investigates the effect of LIPSS on wettability behavior of SS, Cu and Al surfaces. It is shown that nanoripples significantly influenced the wettability character of these metals turning them from hydrophilic to hydrophobic behavior. The most notable behavioral change is observed for SS and Al, where strong hydrophobicity is observed after the generation of LIPSS.
Laser nanopatterning for wettability applications / Orazi, L.; Gnilitskyi, I.; Paula Serro, A.. - 1:(2016). (Intervento presentato al convegno ASME 2016 11th International Manufacturing Science and Engineering Conference, MSEC 2016 tenutosi a usa nel 2016) [10.1115/MSEC20168859].