[Lab on a chip] Origami-based, fast, reconfigurable flow switch for paper microfluidics
Article title: A fast, reconfigurable flow switch for paper microfluidics based on selective wetting of folded paper actuator strips
With exciting devices being built using paper substrates, there is still a critical need for smart and versatile switches to regulate fluid flow across multiple 3D channels. Thus far, switches for paper microfluidics were limited by long response times, large actuation fluid volumes, and use of external control circuitry. We developed a unique actuator device made entirely out of chromatography paper and incorporated with folds. Selective wetting of the fold with a droplet of water raises or lowers the actuator's tip and thus engage or break the fluidic contact between channels. Our actuator's response time is dramatically reduced (within two seconds from wetting) and a very small volume of actuation fluid is consumed (four microliters). This work brings the concept of origami to paper microfluidics for programmable switching of fluidic connections.
Links to the paper and videos: http://pubs.rsc.org/en/content/articlelanding/2017/lc/c7lc00620a#!divRelatedContent&articles