Optical birefringence in strain tuneable silk fibroin whispering gallery mode cavities
2021
Silk fibroin is a promising host biomaterial for the development of the forthcoming generation of wearable opto-electronic devices [1] ; also exhibiting interesting sensing functionalities [2] . Silk fibroin undergoes a unique structural transformation from the Silk I (amorphous) to the Silk II (semi-crystalline) structure; this transformation is accompanied by a number of distinct changes in the physical (i.e., wettability) and optical (birefringence) properties of this biomaterial, while being underlined by the augmentation of nano-crystalline β-sheet structures occurring in the Silk II structure.
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