Figure 2

Scanning Electron Microscopy images of CCH and CCH loaded with SeNPs: (A) CCH; the red scales show the diameter of hydrogel fibers at nanometer scale. (B) CCH loaded with SeNPs; the red scales show the diameter of SeNPs loaded in CCH. CCH: chitosan-N-cetyl-N,N,N-trimethylammonium bromide-based hydrogel, SeNPs: selenium nanoparticles.