Issue 42, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
14 Maijs 2020
Accepted
10 Jūl. 2020
First published
13 Jūl. 2020

Nanoscale, 2020,12, 21629-21634

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, 12, 21629 DOI: 10.1039/D0NR03743E

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