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. Author manuscript; available in PMC: 2017 Aug 31.
Published in final edited form as: ACS Appl Mater Interfaces. 2016 Aug 22;8(34):22629–22636. doi: 10.1021/acsami.6b05754

Fig. 1.

Fig. 1

Process for fabrication of a semipermeable ultrathin PLLA membrane. a) PVA microneedle array is created by casting the PVA solution on a fused-silica mold and by allowing the PVA to dry. b) PVA replica is lift-off bonded to coverslip using adhesive tape (black solid line). c) PVA replica is spin coated with PLLA. d) PLLA film is placed in contact and aligned to the PDMS microfluidic layer. e) PLLA film is adherent on the PDMS layer. f) The final assembled device presents the PLLA barrier between two microfluidic chambers.