Fig. 1.

Chitin nanofiber-based micropatterned substrate fabrication process. (a) chitin/HFIP solution (0.1 % w/w) was poured on the top of the (b) mold covered with a glass slide to create a supported substrate after drying overnight and its optical image with diffraction pattern on it (c) Thicker films were obtained from more concentrated solutions (0.2 % w/w) to create free-standing substrates, which were robust and easy to handle. The optical image demonstrated the diffraction pattern on the free-standing chitin film.