FIGURE 2  Characterization of DP.
(A) Representative SEM images and (B) AFM images showing the surface topographies of collagen, NP, and DP scaffolds.(C) Masson trichrome staining of each scaffold type.(D) Picrosirius red analysis of the collagen fiber structure in each group. (E) Immunohistochemical staining for type I collagen. (F) Safranin-O staining for GAG retention.(G) Water contact angle and waterdrop shape for each scaffold type. (H) Mechanical properties of collagen, NP, and DP scaffolds. (A,C,F) Scale bar, 200 μm and 50 μm. (D,E) Scale bar, 200 μm.