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(A) The formation mechanism of granular and plate-like HA crystals during electrodeposition, in which the crystal structure of HA is drawn by Vesta 3.0 software and the red arrow is the preferred growth direction of HA crystal. (B) SEM images of braids at different deposition times and its simple models, in which the surface of braid can be simplified to a rectangle with a notch in the upper part before deposition (0 min).
