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. 2022 Dec 26;10:rbac107. doi: 10.1093/rb/rbac107

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© The Author(s) 2022. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 2. — (a) SEM images of the cross-section of (PC/collagen)₈ fabricated at pH 8.5. (b) XPS analysis of (PC/collagen)₄. The content (%) of N was dependent on the outermost material (the integers in the x-axis are the outermost layers of the PC, the other points were the outermost layers of collagen) of PC/collagen fabricated at pH 8.5. (c) The relationship between the thickness of PC/collagen coating and the number of bilayers prepared at different pH values. (d) The thickness of (PC/collagen)₈ fabricated at pH 8.5 after incubating in different solutions for different days. The scale bar is 100 nm.