Theories of elastic shell buckling in drying colloidal droplet

Evaporation of drops is ubiquitous in any real environment. We have all experienced drying of coffee on surfaces and rolling of water drops on lotus leaf to the extent that these natural phenomena are translated into engineering products ^_ from inkjet printing to water repellent surface sprays. They are a delight for fluid mechanics thinkers. Not very often researchers from diverse fields, like solid and fluid divisions discuss science until a drop of coffee spills on the tablecloth and they begin to surprise with their scientific insights. A drying droplet is once such phenomena. Sessile drops dispersed with solid constituents evaporating in a natural environment intersects science across disciplines. In this study, we discuss theories of elastic shell buckling to explain the eventual collapse of a drying colloidal droplet that had self-assembled to form a shell. Why? and how? does this fluid drop fracture when evaporation is about to drive away the fluid. This can bring interesting insights into the Physics of drying droplets.