| Abstract
| - Directed assembly of fine-scale, very complex patterns with a variety of features, including terminations, jogs,disclinations, acute and obtuse bends, and sharp radii of curvature, was achieved with a symmetric poly(styrene-block-methylmethacrylate) (PS-b-PMMA) copolymer. The complex pattern was generated spontaneously by spincoating and annealing a thin film of a lamellae-forming block copolymer on a chemically neutral surface. The resulting“fingerprint” pattern had a domain spacing of 47.5 nm. Oxygen plasma treatment of the block copolymer convertedit into an insoluble chemical nanopattern that was quantified by XPS, goniometry, and the wetting behavior of theblock copolymer. Spin coating a second thin film of the block copolymer and annealing resulted in directed assemblythat replicated the fingerprint pattern, including the most complicated defect structures. A computer vision algorithmwas developed and implemented to compare the patterns quantitatively, taking into account inherent differences inimage contrast, scale, rotation, and translation.
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