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Responsive Thin-Film Interference Colors from Polaronic Conjugated Block Copolymers

Title
Responsive Thin-Film Interference Colors from Polaronic Conjugated Block Copolymers
Authors
Moon, Cheon WooPark, Ji-EunPark, MinkyeongKim, YoungjiNarasimha, KarnatiHyun, Jerome KarthamPark, So-Jung
Ewha Authors
박소정현가담박지은
SCOPUS Author ID
박소정scopus; 현가담scopus; 박지은scopus
Issue Date
2021
Journal Title
ACS APPLIED MATERIALS & INTERFACES
ISSN
1944-8244JCR Link

1944-8252JCR Link
Citation
ACS APPLIED MATERIALS & INTERFACES vol. 13, no. 1, pp. 1555 - 1561
Keywords
thin-film interferencestructural colorstimuli-responsiveconjugated polymerhole polaron
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Colors responsive to the chemical environment can form the basis for simple and highly accessible diagnostic tools. Herein, the charge modulation of conjugated polymers is demonstrated as a new mechanism for chemically responsive structural colors based on thin-film interference. A liquid-liquid interfacial self-assembly is employed to create a conjugated block copolymer film that is flexible, transferable, and highly homogeneous in thickness over a large area. Gold (Au) complexes are introduced in the self-assembly process for in situ oxidation of conjugated polymers into a hole-polaronic state that renders the polymer film responsive to the chemical environment. When transferred onto a reflective substrate, the film shows thickness-dependent tunable reflective colors due to the optical interference. Furthermore, it experiences drastic changes in its dielectric behavior upon switching of the polaronic state, thereby enabling large modulations to the interferometric colors. Such responsive thin-film colors, in turn, can be used as a simple and intuitive multicolor readout for the recognition of reductive vapors including biological decomposition products.
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DOI
10.1021/acsami.0c19252
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자연과학대학 > 화학·나노과학전공 > Journal papers
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