Figure 1:

Schematic of PDMS double casting using derived from an initial photoresist mold and examples of functionalization techniques for debonding layering. In double casting the PDMS negative is used as an intermediary to produce PDMS masters which can be used until deterioration. The PDMS negative can then be used to produce further copies of the PDMS master until deterioration which both multiplies the number of masters and extends the lifetime of individual PDMS molds. The debonding layer (in green) can be generated through a variety of chemistries (B) such as silane, polymers such as polydopamine, or even treatments such as heat or alcohol washes.