5019 Effect of suspended particles in evaporation process of volatile droplet on solid substrate

Abstract

Behavior of particles depositing in the vicinity of solid-liquid-gas boundary line (contact line) of a volatile droplet sitting on solid substrate is focused. This phenomenon is called as 'coffee stain problem.' The present paper discusses two major topics under the conditions with and without solutocapillary convection ; (1) morphological pattern formation by the particles stuck on the solid surface after the dryout of the droplet and (2) spatio-temporal particle motion in the evaporating droplet.