Fig. 1: Structural characteristics and thermal stability of flexible fibers.

a FTIR spectra and b TGA curves for PAA, PI and the PI/TiO₂ flexible fibers. c XRD patterns for PI, PI/TiO₂ and the PI/TiO₂/Ag flexible fibers. d EDX spectrum of the PI/TiO₂/Ag-0.07 flexible microfibers