Microscopic active droplets are able to swim autonomously in viscous flows. This puzzling
feature stems from solute exchanges with the surrounding fluid via surface reactions or their …

The field of active matter, and particularly active emulsions, is growing rapidly, with
significant progress made recently on both theoretical and experimental fronts. Here, we …

Biological microswimmers navigate upstream of an external flow with trajectories ranging
from linear to spiralling and oscillatory. Such a rheotactic response primarily stems from the …

We report on the emergence of spontaneously rotating clusters in active emulsions.
Ensembles of self-propelling droplets sediment and then self-organise into planar …

Many artificial miniature robotic collectives have been developed to overcome the inherent
limitations of inadequate individual capabilities. However, the basic building blocks of the …

Confinement increases contacts between microswimmers in dilute suspensions and affects
their interactions. In particular, boundaries have been shown experimentally to lead to the …

Micellar solubilization is a transport process occurring in surfactant‐stabilized emulsions that
can lead to Marangoni flow and droplet motility. Active droplets exhibit self‐propulsion and …

We numerically investigate the hydrodynamics of a spherical swimmer carrying a rigid cargo
in a Newtonian fluid. This swimmer model, a 'squirmer', which is self-propelled by generating …

Mass transport in suspensions of swimming microorganisms is one of the most important
factors for the colonisation and growth of microorganisms. Hydrodynamic interactions …

Microswimmers exhibit more diverse behavior in quasi-two dimensions than in three
dimensions. Such behavior remains elusive due to the analytical difficulty of dealing with two …