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. 2021 Jan 12;8:621788. doi: 10.3389/fbioe.2020.621788

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Copyright © 2021 Lu, Sun, Zou, Song and Yang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The characterization of the graphene-coated titanium sheets. (A) The Raman spectra, (B) XPS measurement spectra, (C) the high resolution XPS C1s core level spectra, (D) FTIR spectra and (E) the conductivity of graphene-coated titanium sheets (S1, S2, and S3) and titanium sheet (Ti). (**p < 0.01 and ****p < 0.0001).