microfluidic liquid handling gif comp

"Vapour-mediated sensing and motility in two-component droplets. “Controlling the wetting behaviour of liquids on surfaces is important for a variety of industrial applications such as water-repellent coatings and lubrication. Liquid behaviour on a surface can range from complete spreading, as in the ‘tears of wine’ effect, to minimal wetting as observed on a superhydrophobic lotus leaf. Controlling droplet movement is important in microfluidic liquid handling, on self-cleaning surfaces and in heat transfer. […] Here we show that two-component droplets of well-chosen miscible liquids such as food coloring (propylene glycol and water) deposited on clean glass are not subject to pinning and cause the motion of neighbouring droplets over a distance.” via YouTube.