Multiscale ultrafast laser texturing of marble for reduced surface wetting

The modification of the wetting properties marble surfaces upon multi-scale texturing induced by ultrafast laser processing (340 fs pulse duration, 1030 nm wavelength) has been investigated with aim evaluating its potential for surface protection. contact angle (CA) a water drop placed on was used to assess wettability processed areas. Although are initially hydrophilic treatment, after few days they develop strong hydrophobic behavior. Marble have irradiated different scan line separations elucidate relative roles roughness (nano- and micro-texture) chemical changes at surface. time evolution then monitored up 11 months treatment. A short long-term evolution, associated combined effect attachment species over time, observed. XPS ATR measurements consistent progressive hydroxylation treated although additional contribution hydrocarbon adsorbates cannot be ruled-out. robustness results tested CA cleaning in conditions very positive results.