Figure 6.

Digital photographs (A), SEM micrographs (B–E), and compressive strengths of scaffolds (F): the photograph (A) shows appearances of the collagen scaffold (a), GO-coated collagen scaffold (b), and RGO-coated collagen scaffold (c); SEM micrograph of the inner surface of the collagen scaffold (B); higher magnification of the collagen scaffold, showing the smooth surface (C); higher magnification of the GO-coated collagen scaffold, showing its irregular surface (D); higher magnification of the RGO-coated collagen scaffold, showing the rough surface frequently produced by chemical reduction (E); and compressive strength of each scaffold (F).

Notes: *P<0.05. Scale bars represent 2 mm (A), 100 μm (B), and 10 μm (C–E), respectively.

Abbreviations: SEM, scanning electron microscopy; GO, graphene oxide; RGO, reduced graphene oxide; Ctrl, control.