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Explore the use of UV-curable polyurethane acrylate as an alternative to PDMS for creating sub-100 nm features. The unique mechanical properties allow for the fabrication of nanostructures as small as 50 nm through capillary action. PEG dimethacrylate fills the voids of the mold and cures under UV exposure, forming PEG nanopillars for protein and cell adsorption studies with adhered fibroblast filopodia growth.
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PUA molding UV curable poly(urethane acrylate) used instead of PDMS (poly(dimethyl siloxane)) mechanical properties of PDMS makes it difficult to create sub 100 nm features low elastic modulus, high compressibility photo-cross-linkable PEG dimethacrylate features as small as 50 nm could be created through capillary action the PEG fills the voids of the mould then cured through exposure to UV
PEG nanopillars for protein and cell adsorption studies 150 nm @ base 50 nm @ peak 500 nm spaces 250-300 nm height adhered fibroblast filopodia growth along nanopillar structure
