Fig. 2: Fabrication and characterization of the THFOW.

Schematic illustration of (a) the fabricating process of the THFOW and (b) heat emission from the core monomer precursor; (c) Photos of the (N70D30)50 hydrogel and the fabricated THFOW; Photos of (d) a bobbin of the fabricated THFOW and (e) Cross-sectional and side view of the THFOW in deionized water, scale bar = 1000 μm; (f) Light transmission within the THFOW.