Biomimetic Chiral Photonic Crystals

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Lv, Jiawei
Ding, Defang
Yang, Xuekang
Hou, Ke
Miao, Xiang
Wang, Dawei
Kou, Baichuan
Huang, Ling
Tang, Zhiyong
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2019
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Abstract

Although it is well known that the amazing iridescent colors of the cuticle of beetles reflect the intricate nanoscale organization of bio‐fibers, artificial inorganic materials with comparable optical responses have not yet been synthesized from abiotic nanoscale building blocks. Such materials could find broad applications, including in circular polarizers, to generate circularly polarized luminescence, or in lasers. Herein, we describe a general method for the fabrication of biomimetic chiral photonic crystals by Langmuir–Schaefer assembly of colloidal inorganic nanowires. We not only reproduced the intricate helical structure and circularly polarized color reflection observed in beetles, but also achieved the highest chiroptical activity with a dissymmetry factor of −1.6 ever reported for chiral inorganic nanostructures. More importantly, the programmable structural control based on the precise interlayer arrangement endows us with unprecedented freedom to manipulate the optical activity of as‐fabricated chiral photonic crystals.

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Angewandte Chemie - International Edition

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58

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23

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© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Biomimetic Chiral Photonic Crystals, Angewandte Chemie, International Edition, Volume 58, Issue 23, June 3, 2019, Pages 7783-7787, which has been published in final form at 10.1002/anie.201903264. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html)

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Chemical sciences

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