Responsive Thin-Film Interference Colors from Polaronic Conjugated Block Copolymers
- 주제(키워드) conjugated polymer , hole polaron , stimuli-responsive , structural color , thin-film interference
- 등재 SCIE, SCOPUS
- 발행기관 American Chemical Society
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000175550
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsami.0c19252
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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. © 2020 American Chemical Society.
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