Fig. 2: Structural characterization of ASPC hydrogel.

a–c SEM images with different magnifications of the ASAA scaffold. d–g SEM images with different magnifications of the ASPC hydrogel: top view (d, e); side view (f, g). Micro-CT of the ASPC hydrogel (h) and its structure perpendicular to the AgNW/SA lamellae (i). The yellow dashed lines and red arrows represented the lamellae and AgNW/SA nanopillars, respectively. j Optical image showing lamellar structure of the ASPC hydrogel. k Raman scattering mapping of nanopillars between the lamellae of the ASPC squared in (j). l Raman spectra of three regions squared in (k).