Fig. 5

Scanning transmission electron microscopy (STEM) - High angle annular dark field (HAADF) imaging of the SFO nanofiber (a) NF21,(b) NF22,and (c) NF23.

Scanning transmission electron microscopy (STEM) - High angle annular dark field (HAADF) imaging of the SFO nanofiber (a) NF21,(b) NF22,and (c) NF23.