Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 59: Microswimmers II (joint session DY/CPP/BP)

DY 59.11: Vortrag

Donnerstag, 15. März 2018, 12:45–13:00, BH-N 243

Active Double Emulsions — •Kyle A. Baldwin, Babak Vajdi Hokmabad, and Corinna C. Maass — MPI für Dynamik und Selbstorganisation, Göttingen

Active emulsions – solutions containing self-propelling microscopic droplets – display a rich variety of solo and collective swimming behaviours, from self-avoiding helices to collective raft formation, which are strongly influenced by factors such as wall proximity, auto-chemotaxis, and liquid crystal (LC) structure. Here, we report on the formation and swimming behaviour of active water-oil-water (WOW) double-emulsions; swimming LC oil droplets which carry a secondary inner water droplet. We observe new periodically oscillating swimming modes, and find that shell stability is strongly influenced by nematicity, which inhibits coalescence of the aqueous phases. The utility of these double emulsion swimmers as cargo carriers, and the ability to release this cargo on-demand, makes this system an ideal mechanism for chemical delivery to localised, switchable reaction sites, with prospects for drug delivery.