Composition with red, yellow, blue, green, and clear droplets
University of Waterloo
Université libre de Bruxelles
Long before photography existed, poets captured the mesmerizing behaviour of droplets: the ancient poet Du Fu penned “Heavy dew beads and trickles. Stars suddenly there, sparse, next aren’t,” and Jules Renard similarly observed “Quelques gouttes de rosée sur une toile d’araignée, et voilà une rivière de diamants.” Inspired by the huge droplets captured on the bifurcated leaf tips of cypress trees, we’ve found that the corner of two crossed fibres can hold significantly more water than a horizontally placed fibre. At 10 μL, the green droplet suspended on the horizontal fibre in this image holds the least water. As we decrease the angle between the fibres, you can see that the maximum droplet volume increases. The 89° angled fibres hold a blue droplet of 27 µL, and the 36° angled fibres maximize the volume of the red droplet to 65 µL. However, decreasing the fibre angle further to 13° reduces the volume of the yellow droplet to 37 µL.