-A A +A
Investigations on surface properties of poly(dimethylsiloxane) (PDMS) are justified by its large application ranges especially as coating polymer in fluidic devices. At a micrometer scale, the liquid dynamics is strongly modified by interactions with a solid surface. A crucial parameter for this process is microchannel wettability that can be tuned by acting on surface chemistry and topography. In literature, a number of multi-step, time and cost consuming chemical and physical procedures are reported. Here we selectively modify both wetting and mechanical properties by a single step treatment. Changes of PDMS surface were investigated by X-ray photoelectron spectroscopy and atomic force microscopy and the effects of interface properties on the liquid displacement inside a microfluidic system were evaluated. The negative capillary pressure obtained tailoring the PDMS wettability is believed to be promising to …
Publication date: 
1 Aug 2012

Ilenia Viola, Antonella Zacheo, Valentina Arima, Antonino S Aricò, Barbara Cortese, Michele Manca, Anna Zocco, Antonietta Taurino, Ross Rinaldi, Giuseppe Gigli

Biblio References: 
Volume: 258 Issue: 20 Pages: 8032-8039
Applied surface science