Difference between revisions of "Buckling of drying droplets of colloidal suspensions"

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Physical Review Letters 94, 018302 (2005)
 
Physical Review Letters 94, 018302 (2005)
  
==Soft matter keywords==
+
===Soft matter keywords===
 
buckling, elastic shell, drying, sol-gel, Leidenfrost effect
 
buckling, elastic shell, drying, sol-gel, Leidenfrost effect
  

Revision as of 06:03, 23 February 2009

Onset of Buckling in Drying Droplets of Colloidal Suspension

Authors: N. Tsapis, E. R. Dufresne, S. S. Sinha, C. S. Riera, J.W. Hutchinson, L. Mahadevan, and D. A. Weitz

Physical Review Letters 94, 018302 (2005)

Soft matter keywords

buckling, elastic shell, drying, sol-gel, Leidenfrost effect


By Tom Kodger


Abstract from the original paper

Minute concentrations of suspended particles can dramatically alter the behavior of a drying droplet. After a period of isotropic shrinkage, similar to droplets of a pure liquid, these droplets suddenly buckle like an elastic shell. While linear elasticity is able to describe the morphology of the buckled droplets, it fails to predict the onset of buckling. Instead, we find that buckling is coincident with a stress-induced fluid to solid transition in a shell of particles at a droplet’s surface, occurring when attractive capillary forces overcome stabilizing electrostatic forces between particles.

Practical Application of Research