Fig. 3
Chemical, crystallographic, and mechanical properties of AgNF. a XRD spectra of as-prepared AgNF and precursor fibers, red line shows the peaks position of silver JCPDS card No. 04–0783. b TGA and DSC results of precursor fibers. c Raman spectra of precursor fiber and AgNF from 850 to 2000 cm−1. d Selected area SEM image of precursor fiber, and AgNF. Scale bar: 1 μm. e–g Element energy spectrum of AgNF. Inset of e shows the TEM image of graphite carbon layer. Scale bar: 5 nm. f, g SEM and element mapping of silver of AgNF. Scale bar 1 μm. h SEM image of a bended AgNF film and its partial enlargement. Scale bar: 300 and 50 μm. i Durability test showing conductivity decrease versus bending radius, and j bending cycles of AgNF on PET and sputtered silver film on PI, which were both bent to a radius of 4 mm for a thousand times
