Figure 1.

Experimental system for the production of droplets with an asymmetric shape. (a) Schematic diagram of the channel design. An organic solution containing ${\mathrm{CaCl}}_2$ emulsions and an aqueous solution of NaAlg contact with each other at the junction indicated by the blue dashed rectangle. Both the channel height and width around the junction are $50\mathsf{\mu }\mathrm{m}$. (b) Microscopic image of the junction. Scale bar, $50\mathsf{\mu }\mathrm{m}$. (c) Schematic illustration of the flow at the junction.