Long-Range Order Self-Assembly of Conjugated Block Copolymers at Inclined Air–Liquid Interfaces
- Saejin OhSaejin OhDepartment of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, KoreaMore by Saejin Oh
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- Seulki KangSeulki KangDepartment of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, KoreaMore by Seulki Kang
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- Ma. Helen M. CativoMa. Helen M. CativoDepartment of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United StatesMore by Ma. Helen M. Cativo
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- Myungjae YangMyungjae YangDepartment of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 151-747, KoreaMore by Myungjae Yang
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- Sung-Hee ChungSung-Hee ChungDepartment of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, KoreaMore by Sung-Hee Chung
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- Jeongsu KimJeongsu KimDepartment of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 151-747, KoreaMore by Jeongsu Kim
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- Jean BouffardJean BouffardDepartment of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, KoreaMore by Jean Bouffard
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- Seunghun Hong*Seunghun Hong*E-mail: [email protected]. (S.H.)Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 151-747, KoreaMore by Seunghun Hong
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- So-Jung Park*So-Jung Park*E-mail: [email protected]. (S.-J.P.)Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, KoreaMore by So-Jung Park
Abstract
Here, we report that long-range order, direction-controlled, ultrathin conjugated polymer films can be formed by the self-assembly of conjugated block copolymers (i.e., poly(3-hexylthiophene)-block-poly(ethylene glycol)) at inclined air–water interfaces. Structure analyses revealed well-aligned nanowire arrays of poly(3-hexylthiophene) with a dramatically increased ordered domain size compared to the polymer films formed on a flat water surface. The improved degree of order was attributed to the flow field created by the enhanced solvent evaporation at the top of the water contact line. Note that it is challenging to prepare such well-ordered and molecularly thin films of conjugated polymers by conventional fabrication methods. The long-range order polymer film showed hole mobility an order of magnitude higher than polymer films formed on a flat interface when implemented as an active layer of field-effect transistor devices. This study demonstrates that a simple interface modification can significantly impact the self-assembly process, structure, and function of polymer films formed at the air–liquid interface.
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This article is cited by 11 publications.
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