Formation of superhydrophobic poly(dimethysiloxane) by ultrafast laser-induced surface modification.
The formation of hemispherical nanostructures and microscaled papilla by ultrafast laser irradiation was found to be a potential method to generate superhydrophbic surface of synthetic polymers. Irradiation of femtosecond laser creates roughened poly(dimethylsiloxane) (PDMS) surface in nano- and microscales, of which topography fairly well imitate a Lotus leaf in nature. The modified surface showed superhydrophobicity with a contact angle higher than 170 degrees as well as sliding angle less than 3 degrees. We further demonstrated that negative replica of the processed PDMS surface exhibit large contact angle hysteresis with a sliding angle of 90 degrees while the positive replica maintains superhydrophobicity.
Yoon
Tae Oh
TO
Division of Advanced Technology, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
Shin
Hyun Joo
HJ
Jeoung
Sae Chae
SC
Park
Youn-Il
YI
D004129:Dimethylpolysiloxanes / Q000737:chemistry* / Q000528:radiation effects*; D057927:Hydrophobic and Hydrophilic Interactions; D007834:Lasers; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D009757:Nylons / Q000737:chemistry* / Q000528:radiation effects*; D055095:Optics and Photonics / Q000295:instrumentation*; D013499:Surface Properties
D004129:Dimethylpolysiloxanes; D009757:Nylons; C085707:poly(dimethylsiloxane)-polyamide copolymer