Figure 7.

Typical examples for supraparticles prepared by drying of aqueous droplets containing polystyrene (PS) latex particles dispersed in fluorinated oil. Spherical supraparticles are formed showing different color patterns based on the size of the PS latex particles: (a) 270 nm and (b) 320 nm, scale bars = 500 µm. These patterns arise from light-diffraction due to long-range ordering of the particles as shown in (c) at the surface and (d) along the vertically-broken edge of a similar supraparticle; scale bars = 1 µm. Adapted with permission from [25] (p. 2241). Copyright 2000 Science.