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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 Woo; Park, Ji-Eun; Park, Minkyeong; Kim, Youngji; Narasimha, Karnati; Hyun, Jerome Kartham; Park, So-Jung
- Ewha Authors
- 박소정; 현가담; 박지은
- SCOPUS Author ID
- 박소정; 현가담; 박지은
- Issue Date
- 2021
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- ISSN
- 1944-8244
1944-8252
- Citation
- ACS APPLIED MATERIALS & INTERFACES vol. 13, no. 1, pp. 1555 - 1561
- Keywords
- thin-film interference; structural color; stimuli-responsive; conjugated polymer; hole polaron
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; 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.
- DOI
- 10.1021/acsami.0c19252
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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