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

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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.

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

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Supplementary files

Article information


Submitted
14 May 2020
Accepted
10 Jul 2020
First published
13 Jul 2020

Nanoscale, 2020, Advance Article
Article type
Paper

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

W. Park, T. Ha, T. S. Jung, K. I. Sim, J. H. Kim, J. M. Wolska, D. Pociecha, E. Gorecka, T. Kim and D. K. Yoon, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR03743E

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