Double emulsion drop evaporation and resurfacing of daughter droplet

TL;DR

This paper investigates the evaporation behavior of double emulsion drops, revealing a surprising resurfacing of daughter droplets, supported by experimental and theoretical analysis, and explores similar phenomena in single-phase drops.

Contribution

It introduces a novel observation of daughter droplet resurfacing after double emulsion evaporation and provides a theoretical explanation for this phenomenon.

Findings

Resurfacing of daughter droplets observed after inner phase evaporation.

Prolonged fixed contact line evaporation demonstrated in single-phase drops.

Theoretical analysis supports the experimental findings.

Abstract

In this study, we present experimental and theoretical analyses of double emulsion drop evaporation. After the apparent completion of evaporation of the inner phase of a double emulsion drop, surprisingly, a resurfacing of a daughter droplet is observed. We further investigated to hypothesize this phenomenon which allowed us to obtain a prolonged fixed contact line evaporation for a single phase drop along with similar occurrence of resurfacing as of the double emulsion drops.