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Directed self-assembly of a helical nanofilament liquid crystal phase for use as structural color reflectors

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Title
Directed self-assembly of a helical nanofilament liquid crystal phase for use as structural color reflectors
Author(s)
Dong Ki Yoon; Teun-Teun Kim; Taewoo Ha; Taek Sun Jung; Damian Pociecha; Kyung Ik Sim; Tae Joo Shin; Anna Zep; Wongi Park; Jae Hoon Kim; Hyungju Ahn; Ewa Gorecka
Publication Date
2019-08
Journal
NPG ASIA MATERIALS, v.11, no.1, pp.45 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2019, The Author(s).Abstract: The fabrication of molecular structures with a desired morphology, e.g., nanotubes, nanoribbons, nanosprings, and sponges, is essential for the advancement of nanotechnology. Unfortunately, realization of this objective is expensive and complicated. Here, we report that irradiating a film comprising azobenzene derivatives with UV light produces oriented arrays of helical nanofilaments via the photoisomerization-induced Weigert effect. As a result, structural colors are observed due to the extrinsic chiral reflection in the visible wavelength range, and the reflected color can be tuned by adjusting the molecular length of the azobenzene derivative. This simple fabrication method can be used for fabricating large, reversible, and patternable color reflectors, providing a new platform for interference-based structural coloration as it exists in nature, such as morpho butterflies, green-winged teal, and various beetles
URI
https://pr.ibs.re.kr/handle/8788114/6450
ISSN
1884-4049
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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