Fig. 1. (A) The macro morphology of (a) bare scaffold, (b) HA/L coated scaffold, (c) HA/H coated scaffold. (B) SEM images of (a, d and g) bare surface, (b, e and h) HA/L coated surfaces, (c, f and i) HA/H coated surfaces. (C) Contact angle between the water drop and the disk-shaped samples: (a) bare scaffold; (b) HA/L coated surface; (c) HA/H coated surface. (d) Water contact angle analysis; asterisks (*) indicate statistical significance, p < 0.05; error bars represent SD (n = 3). (D) The XRD patterns of ha powder in HA/H group and HA/H group; asterisks (*) indicate the peaks of the HA crystal.
