High speed video of droplet generation. Impact droplet generation in our device captured at 1,000 frames per second. The circular indentation is of the actuator pin. As was the case in S3 Movie, flow-focusing microfluidic geometry was implemented. However, in this case, unlike in S3 Movie, capillary valve geometry was not implemented on the channel carrying the water-based solution at the point where it intersects with the oil line. Mineral oil was used as the carrier fluid and deionized water with food coloring was used for the water-based droplets solution. The playback frame rate is 5 frames per second.
Korir G, Prakash M
CC BY 4.0
<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4349784/bin/pone.0115993.s011.mp4">S4 Movie</a> from <cite style="font-style:normal">Korir G, Prakash M (2015). "<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4349784">Punch Card Programmable Microfluidics</a>". <i>PLOS ONE</i>. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371/journal.pone.0115993">10.1371/journal.pone.0115993</a>. <a href="https://en.wikipedia.org/wiki/PMID" class="extiw" title="w:PMID">PMID</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/25738834">25738834</a>. <a href="https://en.wikipedia.org/wiki/PubMed_Central" class="extiw" title="w:PubMed Central">PMC</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4349784">4349784</a>.</cite>