Fig. 1From: Tannic acid-functionalized 3D porous nanofiber sponge for antibiotic-free wound healing with enhanced hemostasis, antibacterial, and antioxidant propertiesSynthesis and characterization of 3D-TA. a Schematics of the preparation of 3D-TA1.0 nanofiber sponge. b, c SEM images of different scaffolds. d The fiber diameter distribution of 2D nanofiber membrane. e The porosity of different samples. f The FTIR spectra of TA, 3D and 3D-TA1.0 nanofiber spongesBack to article page