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. 2013 Sep 11;20(1-2):130–138. doi: 10.1089/ten.tea.2012.0772

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Copyright 2014, Mary Ann Liebert, Inc.

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FIG. 1. — Nanoimprint lithography was employed to imprint the nanofeatures from nanofeatured molds into polystyrene or polypropylene thin films. Scanning electron microscopy (SEM) images reveal (a) a polystyrene thin film with features having an aspect ratio of 0.88, (b) a polypropylene thin film with features having an aspect ratio of 20, (c) a polystyrene thin film with hierarchical nanofeatures having aspect ratios of 0.5, 1.4, and 3.4, and (d) a polystyrene thin film with features having an aspect ratio of 5.