The confined self-assembly of asymmetric diblock copolymer polystyrene--poly(methyl methacrylate) (PS--PMMA) within an array of silica nanobowls prepared using a colloidal spheres templating technique is investigated. By manipulation of the nanobowl size, block copolymer (BCP) thickness, and interfacial interaction, a rich variety of ordered BCP nanostructures not accessible in the bulk system or under other confinements are obtained, resulting in hierarchically ordered nanostructures.
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| http://dx.doi.org/10.1021/mz200032k | DOI Listing |
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