Materials
A nanofiber scaffold was prepared via the touch‐spinning method in a free‐standing manner on a wire collector from 8% polycaprolactone (PCL,M n = 80,000 g/mol, Sigma‐Aldrich) in chloroform (ACS grade, VWR Chemicals BDH). Details on touch‐spinning can be found in Ref.7. The fibers were exposed to a 0.1% bovine serum albumin (BSA) solution.