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. 2021 Jun 25;8(4):rbab028. doi: 10.1093/rb/rbab028

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© The Author(s) 2021. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://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 3. — The structure of the type I collagen/silk fibroin (CSF) scaffold. A–C: Scanning electron microscopy of scaffold materials with different aperture sizes (due to shooting reasons, A and C showed the bottom surface of scaffold materials, because the printing bottom plate was relatively straight under contact; B showed the top surface of scaffold materials, which the small pores on the surface of scaffold materials were clearly observed); B, D, E: Scanning electron microscopy observations of the CSF2 (magnification: ×200, ×400 and ×800, respectively); F: Optical coherence tomography (observations on the shape rule of scaffold material and uniform distribution of pore diameter); G: Cross-section of CSF2 (×200).