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SEM pictures of silk, silk-CBD, and composite silk-CBD-CNC sponges. (A,B) CNC sponge; (C) 100% silk sponge; (D) silk-CNC composite sponge (75% silk and 25% CNC); (E) 100% silk-CBD sponge; and (F–H) silk-CBD-CNC composite sponge (75% silk-CBD and 25% CNC) on a magnified scale.
