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Defined porous structure of a nanofibrous BC-sheet scaffold prepared by laser perforation (A,B). Honeycomb arrangement of pores of trapezoid-shaped in cross section (C,D). Well-defined round pores of 300 µm in diameter (E) perforate the fibrous nanostructure of the BC-sheet scaffold (F). Reproduced from work in [128] with permission from Springer Nature, 2019.
