On the role of water activity on the formation of a protein-rich coffee ring in an evaporating multicomponent drop

Javier Martínez-Puig, Gianluca D'Agostino, Ana Oña +1

The coffee-ring effect is a universal feature of evaporating sessile droplets with pinned contact line, wherein solutes or particles are advected to the droplet's edge due to evapo…