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. 2020 Jul 25;7(17):2000023. doi: 10.1002/advs.202000023

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© 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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a,b,c) The SEM images of GO/Hap/Ti and GO/NCDs/Hap/Ti. d–f) The TEM images of GO/NCDs/Ti, GO/Hap/Ti, and GO/NCDs/Hap/Ti, respectively. g) The HRTEM image of GO/NCDs/Hap/Ti. h) The XRD curves of Ti, GO/Ti, GO/NCDs/Ti, GO/Hap/Ti, and GO/NCDs/Hap/Ti, respectively. i) The XPS curves of Ti, GO/Ti, GO/NCDs/Ti, GO/Hap/Ti, and GO/NCDs/Hap/Ti, respectively. j) Zeta potential values of Ti, GO/Ti, GO/NCDs/Ti, GO/Hap/Ti, and GO/NCDs/Hap/Ti, respectively. k) The structure sketch map and binding forces of GO/NCDs/Hap/Ti. l,m) The nanoscratch test and nanoindentation test of Ti and GO/NCDs/Hap/Ti.