nicaise_blockcopoly_02

Figure 2: Example SEMSs of single-layer ox-PDMS nanostructures fabricated by the sacrificial method. Shown are (a) square array of nanoholes, (b) square array of nanoposts, (c) square array of nanoholes with a hole generated by each PMMA post and (d) hexagona array of nanoholes with two holes generated by each PMMA post. Insets show the pre-removal locations of negative-tone PMMA posts in white. Red outlines represent unit cells for the final nanostructures. Light grey and dark grey colors represent ox-PDMS and the substrate, respectively.