Fig. 10. (a) Photograph and (b) surface SEM image of the cholesteric wrinkled films, showing bi-structural colour and periodic surface wrinkles similar to those of floral petals. (c) SEM image of a cracked cholesteric wrinkled film showing porous layered structure under the wrinkles. (d) AFM image and numerical analysis of the cholesteric wrinkled films. (e) Illustration of the hierarchical structure of the cholesteric wrinkled films.153 Copyright 2019, Cell Press. (f) Assembly of chiral CNC photonic structures with surface gratings, and topographical AFM image of CNC grating surfaces with highly aligned CNC ordering within trenches. (g) Schematics of enhanced circularly polarized light from CNC films with grating structures. (h) Diffraction pattern by the CNC film.155 Copyright 2020, Wiley.
