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Article Abstract
Photopatterned polymer brushes provide a viable option to alter the surface properties of biosensors, substrates for tissue engineering, or microelectronic implants. Although the one-photon direct laser writing enables excellent control over pattern geometry, it has an inherently limited writing resolution caused by the used light source; moreover, no patterning of undercuts or channels is possible. This article describes the preparation of patterned polymer brushes on confined glass substrates using two-photon-initiated reversible addition-fragmentation chain-transfer (2PRAFT) polymerization of -acryloylmorpholine as a hydrophilic model monomer. The polymer brushes prepared by 2PRAFT exhibit a height of 10 nm, as confirmed by atomic force microscopy. In addition, well-defined printed structures down to 5 μm size are prepared, which outperforms the currently achieved resolution of polymer brushes prepared by one-photon direct laser writing.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11934993 | PMC |
| http://dx.doi.org/10.1002/smsc.202400263 | DOI Listing |
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