Dye-based coatings for hydrophobic valves and their application to polymer labs-on-a-chip

19.03.2010

Riegger L, Mielnik MM, Gulliksen A, Mark D, Steigert J, Lutz S, Clad M, Zengerle R, Koltay P, Hoffmann J

J. Micromech. Microeng. 20 (2010) 045021 (6pp)

We provide a method for the selective surface patterning of microfluidic chips with hydrophobic fluoropolymers which is demonstrated by the fabrication of hydrophobic valves via dispensing. It enables efficient optical quality control for the surface patterning thus permitting the low-cost production of highly reproducible hydrophobic valves. Specifically, a solution based on carbon black (CB) is presented in detail which creates superhydrophobic surfaces on arbitrary substrates.

BIOSS

Dye-based coatings for hydrophobic valves and their application to polymer labs-on-a-chip