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BP: Fachverband Biologische Physik

BP 26: Biopolymers, Biomaterials and Bioinspired Functional Materials (joint session CPP/BP)

BP 26.4: Vortrag

Donnerstag, 21. März 2024, 10:30–10:45, H 0111

Colored CNC films reflect left and right circular polarized light. — •Silvia Vignolini — MPI Colloids and Interfaces Potsdam DE

The chiral self-assembly of nanoscale building blocks is a universal phenomenon that demonstrates the emergence of large-scale structures from the properties of individual sub-units. In many self-organising colloidal systems, such as cellulose nanocrystals (CNC), the emergence of chirality in the mesophase can be correlated to the properties of the building blocks and is therefore necessarily fixed. CNC chiral nematic suspensions are, in fact, always left-handed, giving rise when dried, to colored films reflecting only circular left-polarized light. In this talk, I will review some tricks that can be used to achieve CNC-colored films with circular right-polarized light reflection.