Observation of chemically protected polydimethylsiloxane: towards crack-free PDMS

The current modification of polydimethylsiloxane (PDMS) substrates via oxygen plasma treatment causes surface cracks. Here, we demonstrate a method to prevent crack formation by chemical treatment. Chemical modification renders the surface hydrophilic for several days and is effective in preserving the elasticity of the PDMS surface at the nanoscale level.

Three-dimensional inkjet-printed redox cycling sensor

Electrochemical amplification through redox cycling in an all-inkjet-printed device utilizing four different functional inks.

Inkjet printing of UV-curable adhesive and dielectric inks for microfluidic devices

Bonding of polymer-based microfluidics to polymer substrates still poses a challenge for Lab-On-a-Chip applications. Especially, when sensing elements are incorporated, patterned deposition of adhesives with curing at ambient conditions is required. Here, we demonstrate a fabrication method for fully printed microfluidic systems with sensing elements using inkjet and stereolithographic 3D-printing.