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SEM micrographs of macroporous and nanofibrous PLLA scaffolds, phase separated in dioxane/THF in liquid nitrogen (-196°C). (A-C) THF:dioxane=100:0; (D-F) THF:dioxane=60:40; (G-I) THF:dioxane=40:60; (J-L) THF:dioxane=20:80. Original magnification: 100x for A, D, G, J; 500x for B, E, H, K; and 20,000x for C, F, I, L.
