Figure 1.
Synthesis of core-sheath hydrogel optical fibers via integrated dynamic wet spinning process (ILDWS). (a) Schematic illustration of the integrated dynamic wet spinning apparatus. (b) Photograph of a rolled core-sheath hydrogel fiber (the core was dyed with methylene blue for clarity of illustration). (c) Side-view optical image of a core-sheath hydrogel fiber (re = 0.38). (d) Schematic illustration and chemical reactions for synthesizing core-sheath hydrogel fibers. Schematic formation of (e) core hydrogel and (f) sheath hydrogel. (g) Schematic illustration of formation mechanism of core-sheath hydrogel fiber.