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Long-Range Order Self-Assembly of Conjugated Block Copolymers at Inclined Air-Liquid Interfaces

Title
Long-Range Order Self-Assembly of Conjugated Block Copolymers at Inclined Air-Liquid Interfaces
Authors
Oh, SaejinMa, Seulki KangCativo, Helen M.Yang, MyungjaeChung, Sung-HeeKim, JeongsuBouffard, JeanHong, SeunghunPark, So-Jung
Ewha Authors
Jean Bouffard박소정
SCOPUS Author ID
Jean Bouffardscopus; 박소정scopus
Issue Date
2020
Journal Title
ACS APPLIED MATERIALS & INTERFACES
ISSN
1944-8244JCR Link

1944-8252JCR Link
Citation
ACS APPLIED MATERIALS & INTERFACES vol. 12, no. 4, pp. 5099 - 5105
Keywords
self-assemblyblock copolymerconjugated polymerinterfacenanoarraydirected self-assembly
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
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.
DOI
10.1021/acsami.9b20026
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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