1. Programmable Invisible Photonic Patterns with Rapid Response Based on Two-Dimensional Colloidal Crystals
- Author
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Xudong Chen, Dingshan Yu, Zhikun Zheng, Naiyu Liu, Wei Hong, and Liu Hailu
- Subjects
Materials science ,Polymers and Plastics ,business.industry ,anticounterfeiting ,Organic chemistry ,General Chemistry ,Colloidal crystal ,structural color ,Article ,Optical encryption ,QD241-441 ,photonic crystals ,Optoelectronics ,Wetting ,Photonics ,business ,Structural coloration ,Rapid response ,Photonic crystal - 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.
- Published
- 2021