Chirality is a characteristic of asymmetric structures that allows for the interpretation of two non-superimposable mirror images of a structure. Chiral media have different phase velocities for left- and right-handed circular polarizations, resulting in asymmetric inten- sity or absorption of polarized light, which behaves as chiroptical activity. In my thesis, I examined the development of chiroptical materials based on cellulose nanocrystals. I was focused on the development of new methods for the synthesis of cellulose nanocrystals. This includes researching techniques for precisely controlling their chirality during pro- duction. Different extraction methods also lead to considerable differences in efficiency. Some methods for controlling certain parameters in the structure include surface functionalization, measurement of the chiral nematic phase, and addition of chiral addi- tives during synthesis. Control of pH, temperature, and reaction time is crucial for achiev- ing optimal conditions in shaping chiral structures. In new methods, a high degree of control is necessary to ensure repeatability and accuracy in the production of cellulose nanocrystals.
|
