Watch any liquid — from tap water to the richest coffee — evaporate off a surface and you will see it leave a unique, ghostly mark. Here, we deposited a dilute solution of bovine serum albumin — a protein from cow’s blood.
As the solution droplet evaporated, the protein crystallized and left a delicate pattern similar to that seen in snowflakes, called “dendritic crystallization.”
Hyoungsoo Kim (postdoctoral researcher), François Boulogne (postdoctoral researcher), Howard A. Stone (faculty)