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Active Emulsion droplet arrays

Active Emulsion droplet arrays. LED. sample/projector plane. camera. (a). Irv Epstein, Seth Fraden, Bing Xu Brandeis MRSEC 0820492. 1 2 3 4 5 6. (b).

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Active Emulsion droplet arrays

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  1. Active Emulsion droplet arrays LED sample/projector plane camera (a) Irv Epstein, Seth Fraden, Bing Xu Brandeis MRSEC 0820492 1 2 3 4 5 6 (b) Stabilized emulsions containing the oscillating Belousov - Zhabotinsky chemical reaction (BZ) show interesting dynamics. Each drop acts as an independent chemical clock. However, they chemically communicate and exhibit collective behavior. In (a) six BZ drops are contained in a capillary tube. The white bars are light, which set the oscillators in the reduced state. Drops 1 & 6 are always exposed to light, setting the boundary conditions. Drops 3 & 4 are exposed to light for 0.5 periods. (b) A space time plot of the oscillations. White corresponds to the oxidized state; black to reduced. The drops adopt a dynamic oscillatory state predicted by theory. (c,d) Photograph and schematic, respectively, of experimental set-up. Study of these systems will elucidate a variety of chemically dynamic systems, ranging from neurons to Active Matter – polymeric systems which can convert chemical energy to mechanical motion. (c) time (d)

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