Ferromagnetic liquid droplets with adjustable magnetic properties

Significance Structured functional liquids combine mechanical versatility of fluids with solid-state properties, such as ferromagnetism, and offer a route to synthesize control magnetic for adaptive liquid robotics. Studies on these intriguing materials are only in their nascent state, profound understanding the physical state is still lacking. We use hydrodynamics experiments probe how magnetization ferromagnetic droplets, governed by assembly jamming nanoparticles at liquid–liquid interfaces, response external stimuli can be tuned chemical, structural, means. Our results highlight leading role structural short-range order which provide path toward nano-patterning structured liquids.