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

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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.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-11
Language
English
Article Type
Article
Citation

NANOSCALE, v.12, no.42, pp.21629 - 21634

ISSN
2040-3364
DOI
10.1039/d0nr03743e
URI
http://hdl.handle.net/10203/278576
Appears in Collection
CH-Journal Papers(저널논문)
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