CC BY-NC 4.0Pallab, Nazim UddinNazim UddinPallabReinicke, StefanStefanReinickeGurke, JohannesJohannesGurkeRihm, RainerRainerRihmKogikoski, SergioSergioKogikoskiHartlieb, MatthiasMatthiasHartliebReifarth, MartinMartinReifarth2025-03-242025-03-242024-12-20https://doi.org/10.24406/publica-4439https://publica.fraunhofer.de/handle/publica/48576310.1039/D3PY01036H10.24406/publica-4439Rough, capillary-active surfaces remain demanding substrates for microcontact printing (μCP), as the diffusive mobility of the ink thereon drastically limits the printing resolution. To reduce ink smearing, we developed polymer-supported μCP, which includes a stamp with a polymer brush-decorated surface. The ink molecules are thereby bound to the stamp-bound brush matrix, from where they may be transferred to the substrate, which exclusively occurs during the contact of both interfaces. Conventionally, Sylgard 184-based polydimethylsiloxane (PDMS) stamps are used for μCP. The material's surface must be functionalized in a multi-step procedure for the protocol. In addition, Sylgard comes along with the drawback of a persistent leakage of oligomeric PDMS (oPDMS), which can contaminate the substrate. To circumvent these problems, we developed a novel stamp material that (i) enables a straightforward polymer grafting and (ii) shows a low tendency for oPDMS leakage. We prepared the stamp with a commercially available amino-functionalized PDMS prepolymer and a polymeric crosslinker that can be used for a controlled photoiniferter reversible addition and fragmentation chain transfer (PI-RAFT) polymerization. The prepared stamp shows elastic properties in the relevant strain region, is compatible with brush formation, and has been demonstrated to be suitable for transferring precise patterns on rough capillary-active oxide surfaces.enjournal article