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Security use of the chiral photonic film made of helical liquid crystal structures

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Title
Security use of the chiral photonic film made of helical liquid crystal structures
Author(s)
Park, Wongi; Ha, Taewoo; Jung, Taek Sun; Sim, Kyung Ik; Kim, Jae Hoon; Wolska, Joanna M.; Pociecha, Damian; Gorecka, Ewa; Kim, Teun-Teun; Yoon, Dong Ki
Publication Date
2020-11
Journal
Nanoscale, v.12, no.42, pp.21629 - 21634
Publisher
Royal Society of Chemistry
Abstract
The color change of photonic crystals (PCs) has been widely studied due to their beauty and anti-counterfeiting applications. Herein, we demonstrated security codes based on chiral PCs that cannot be easily mimicked and are quite different from the conventional technology used currently. The chiral PCs can be made by self-assembly and the structural colors change based on the polarization of the light in the transmission mode. These color changes are easily detected in real-time and are useful in the fabrication of anti-counterfeiting patterns that show beautiful and diverse color changes with rotating polarizers. We believe this can provide a new platform in various security and color-based applications
URI
https://pr.ibs.re.kr/handle/8788114/9037
DOI
10.1039/d0nr03743e
ISSN
2040-3364
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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