Title :
Femtosecond laser patterning of PMMA for spatially tailored wettabilty
Author :
De Marco, Carmela ; Eaton, Shane M. ; Rampini, Stefano ; Cerullo, Giulio ; Ramponi, Roberta ; Turri, Stefano ; Levi, Marinella ; Osellame, Roberto
Author_Institution :
Giulio Natta Dept. of Chem., Politec. di Milano, Milan, Italy
Abstract :
To study the influence of femtosecond-laser irradiation on wettability in PMMA, static contact angle measurements were performed before and after the laser processing. To ablate PMMA, 150-fs pulses from an 800-nm, 1-kHz Ti:Sapphire laser were focused by a 10-cm focal length lens (spot size, 2 w0 ~ 20 μm) on the sample surface. We applied a multiscan procedure (scan velocity 2 mm/s) to form a larger ablated area of 4 mm x 4 mm to accommodate the size of the water droplet used in the contact angle measurement.
Keywords :
contact angle; laser beam effects; laser materials processing; optical focusing; optical polymers; wetting; PMMA; femtosecond laser irradiation; femtosecond laser patterning; spatially tailored wettabilty; static contact angle measurements; Laser ablation; Rough surfaces; Substrates; Surface emitting lasers; Surface morphology; Surface roughness; Surface topography;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
DOI :
10.1109/CLEOE.2011.5943332
