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Self-assembly of nHA in the hybrid films from the suspensions (a) HS00, (b) HS20, (c) HS40, (d) HS70, (e) higher magnification of film (d), and (f) films formed by physical blending of chitosan solution and control HA particles with chitosan concentration close to HS70 samples. Scale bars, (a–d,f) 1 μm and (e) 0.5 μm.
