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Dr. Myunghwan Byun, Dr. Wei Han, Bo Li, Dr. Xukai Xin and Prof. Zhiqun Lin An Unconventional Route to Hierarchically Ordered Block Copolymers on a Gradient Patterned Surface through Controlled Evaporative Self-Assembly Angewandte Chemie International Edition 52

Article first published online: 6 DEC 2012 | DOI: 10.1002/anie.201208421

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A chemically patterned surface was formed by controlled evaporative self-assembly of concentric polymer stripes, followed by the removal of weakly deposited polymer, giving ultrathin polymer stripes with a width gradient on the Si substrate (see picture). A thin film of diblock copolymer hierarchically self-assembled on the ultrathin polymer stripes, giving arrays of nanocylinders perpendicular to the surface of the film.

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