Surface properties of femtosecond laser ablated PMMA.
The effects of femtosecond laser ablation on the physical and chemical properties at the surface of poly methylmethacrylate (PMMA) were studied. Femtosecond laser microfabrication caused the initially wetting behavior of PMMA to become nonwetting, mainly because of the laser-induced surface porosity at the submicroscale. Static and dynamic contact angle measurements along with morphological characterization revealed that after the laser irradiation, the system lies in an intermediate regime between those theorized by Wenzel and Cassie-Baxter. Spectroscopic analysis did not evidence any significant variation in the chemical properties of the processed polymeric surfaces.
Marco
Carmela De
CD
Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, Istituto di Fotonica e Nanotecnologie (IFN)-CNR, Milan, Italy. carmela.demarco@chem.polimi.it
Eaton
Shane M
SM
Suriano
Raffaella
R
Turri
Stefano
S
Levi
Marinella
M
Ramponi
Roberta
R
Cerullo
Giulio
G
Osellame
Roberto
R
D001671:Biochemistry / Q000295:instrumentation*; D001695:Biology / Q000295:instrumentation; D007834:Lasers; D044085:Microfluidics / Q000295:instrumentation; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
D014867:Water; D019904:Polymethyl Methacrylate