Multi-Ring Deposition Pattern of Drying Droplets

Abstract

We propose a theory for the multi-ring pattern of the deposits that are formed when droplets of suspension are dried on a substrate. Assuming a standard model for the stick-slip motion of the contact line, we show that as droplets evaporate, many concentric rings of deposits are formed, but are taken over by a solid-circle pattern in the final stage of drying. An analytical expression is given to indicate when ring-pattern changes to solid-circle pattern during an evaporation process. The results are in qualitative agreement with existing experiments, and the other predictions on how the evaporation rate, droplet radius and receding contact angle affect the pattern are all subject to experimental test.

arXiv commentAccepted by Langmuir

References in corpus (3)

• Ring to Mountain Transition in Deposition Pattern of Drying
• Dynamical model for the formation of patterned deposits at receding contact lines
• Vapor-Induced Motion of Liquid Droplets on an Inert Substrate

Cited by in corpus (4)

• Tuning contact line dynamics and deposition patterns in volatile liquid mixtures
• Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets
• Contact Angle of an Evaporating Droplet of Binary Solution on a Super Wetting Surface
• Morphological Control of Linear Particle Deposits from the Drying of Inkjet-Printed Rivulets