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. Author manuscript; available in PMC: 2018 Dec 28.
Published in final edited form as: Biomed Mater. 2017 Dec 28;13(1):015023. doi: 10.1088/1748-605X/aa895c

Figure 2. Membrane Structure and Pore Size Distribution.

Figure 2

Transverse SEM micrographs (A and B) illustrate the structure of HFM’s, which consist of nano-porous interior and exterior skin layers that encapsulate an asymmetric micro-porous (size range 1–500um) interior structural layer. Evapoporometric characterization of the skin layer pore diameter distribution (mean = 39.8 nm ± 3.9 SD, n = 3) revealed a predominantly mesoporous (size range = 1–100nm) distribution of pores with sizes large enough to permit nutrient transport, but small enough to trap large structural proteins within the HFM lumen.