Faceting and Flattening of Emulsion Droplets: A Mechanical Model

Ireth García-Aguilar, Piermarco Fonda, Eli Sloutskin, Luca Giomi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

When cooled down, emulsion droplets stabilized by a frozen interface of alkane molecules and surfactants have been observed to undergo a spectacular sequence of morphological transformations: from spheres to faceted liquid icosahedra, down to flattened liquid platelets. While generally ascribed to the interplay between the elasticity of the frozen interface and surface tension, the physical mechanisms underpinning these transitions have remained elusive, despite different theoretical pictures having been proposed in recent years. In this Letter, we introduce a comprehensive mechanical model of morphing emulsion droplets, which quantitatively accounts for various experimental observations, including the size scaling behavior of the faceting transition. Our analysis highlights the role of gravity and the spontaneous curvature of the frozen interface in determining the specific transition pathway.

Original languageEnglish
Article number038001
JournalPhysical Review Letters
Volume126
Issue number3
DOIs
StatePublished - 22 Jan 2021

Bibliographical note

Publisher Copyright:
© 2021 American Physical Society.

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