Fig. 1: Micro-crescents produced by phase separation in emulsion droplets.

a, b Sets of cartoon and reflection optical micrographs showing the phase separation by evaporation of chloroform and production of micro-crescents through the removal of silicone oil. Scale bar, 50 μm. c Cartoon of a paired drop, where interfacial tensions are balanced as represented with arrows. d Model structure of the paired drop at minimum interfacial energy state calculated using Surface Evolver. e Scanning electron microscope (SEM) image of the micro-crescents. Scale bar, 10 μm. f Sets of photographs for the aqueous suspensions of micro-crescents with an average radius of 9.2, 10.8, and 13.9 μm, respectively. Scale bar, 20 mm. g, h Reflection optical micrographs and reflectance spectra corresponding to (f). Scale bar, 100 μm. Source data for h is provided as a Source Data file.