Fig. 13. (a) Images of the microfluidic water-in-oil droplets and the dried CNC microparticle under cross-polarizers, and the helicoidal assembly within the dried particle.51 Copyright 2016, American Chemical Society. (b) Schematic showing the preparation of photonic microparticles, and the SEM images of a microparticle prior to and after treatment with methanol, showing the volume contraction and increase in buckling. (c) Photographs showing red, green, and blue cellulosic photonic pigments and their dark-field microscopy images in refractive index oil.169 Copyright 2022, Springer Nature. (d) Microscopic photo of shell production using nested glass capillary microfluidic device. Black and orange arrows indicate oil and CNC suspension flows, respectively. (e) Shells with good alignment, and side views of a shell with dyed inner phase during drying. Scale bar: 50 μm. (f) POM and SEM images of dried CNC shells.170 Copyright 2024, Wiley.
