Programmable Invisible Photonic Patterns with Rapid Response Based on Two-Dimensional Colloidal Crystals
Open Access
- 10 June 2021
- Vol. 13 (12), 1926
- https://doi.org/10.3390/polym13121926
Abstract
The development of invisible patterns via programmable patterning can lead to promising applications in optical encryption. This study reports a facile method for building responsive photonic crystal patterns. Commercially printed patterns were used as a mask to induce invisible patterns revealed by wetting. The masked areas exhibit different swelling kinetics, leading to strong structural colors in the masked area and transparent features in the unmasked area. The contrast could disappear through different wetting behavior, providing a unique and reversible wetting feature. This programmable printing is expected to become an environmentally friendly technique for scalable invisible optical anti-counterfeiting technology.Funding Information
- National Natural Science Foundation of China (51833011)
- PCFM Lab of Ministry of Education,School of Chemistry, Sun Yat-sen University (PCFM-2020-01)
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