Dynamic capillary assembly of colloids at interfaces with 10,000g accelerations.

ABSTRACT: High-rate deformation of soft matter is an emerging area central to our understanding of far-from-equilibrium phenomena during shock, fracture, and phase change. Monolayers of colloidal particles are a convenient two-dimensional model system to visualise emergent behaviours in soft matter, but previous studies have been limited to slow deformations. Here we probe and visualise the evolution of a monolayer of colloids confined at a bubble surface during high-rate deformation driven by ultrasound. We observe the emergence of a transient network of strings, and use discrete particle simulations to show that it is caused by a delicate interplay of dynamic capillarity and hydrodynamic interactions between particles oscillating at high frequency. Remarkably for a colloidal system, we find eviden

SUBMITTER: Huerre A 

PROVIDER: S-EPMC6127265 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature