  We study water-in-oil emulsion droplets, running the Belousov-Zhabotinsky
reaction, that form a new type of active matter unit. These droplets,
stabilised by surfactants dispersed in the oil medium, are capable of internal
chemical oscillations and also self-propulsion due to dynamic interfacial
instabilities that result from the chemical reactions. The chemical
oscillations can couple via the exchange of activator and inhibitor type of
reaction intermediates across the droplets under precise conditions of
surfactant bilayer formation between the droplets. Here we present the
synchronization behaviour of networks of such chemical oscillators and show
that the resulting dynamics depend on the network topology. Further, we
demonstrate that the motion of droplets can be synchronized with the chemical
oscillations inside the droplets, leading to exciting possibilities in future
studies of active matter.
