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TEM images of mineralized nHap/Col composite material. (A) The c-axis of needle-like shape of Hap nanocrystals was specifically oriented along the longitudinal direction of the collagen fibrils; (B) each bundle consisting of Hap nanocrystals surrounded with Col fibrils; and (C) high-resolution TEM image with interplanar spacing corresponding to the (002) of Hap. Scale bar: (A) 100 nm; (B) 50 nm; and (C) 5 nm.
