Thursday, 29 September 2016

Arresting Marangoni flows on Bubble Surfaces

Friday, 29 July 2016

Surface tension can sort droplets for biomedical applications

Surface tension can sort droplets for biomedical applications: A team led by Colorado State University's Arun Kota has engineered a simple and inexpensive device that can sort droplets of liquid based solely on the liquids' varying surface tensions.  They used Tunable Superomniphobic Surfaces for Sorting Droplets by Surface Tension that could make a wide range of biomedical applications using a Lab-on-a-Chip like device.  BAM!

Thursday, 28 July 2016

The Maragoni Effect

Link to article:

In Analytical Chemistry Journal researchers led by Jose L. Garcia-Cordero et al from Center for Research and Advanced Studies at the National Polytechnic Institute in Monterrey, Mexico, reported that they designed an alternative that uses microsized pillars instead of wells as a bioassay technique.  An enzyme solution is added to a pillar and concentration by evaporation.  A sample solution (substrate) is added whereby the enzyme reacts to produce a product.  Surface tension keeps the droplet in place and the Maragoni effect where liquid flows to areas of higher surface tension helps the protein and the substrate mix. These Maragoni currents can be used for colorimetric assays as the evaporation is necessary for the reaction to occur.  Possibly it could be an advantage over plate-readers if the they could have faster reaction times or are dealing with substrates or proteins that might degrade or oxidize over a short time period.