Lanthanide-Containing Bilayer Polymers With Programmable Wrinkling Dynamics Coherent With Visible Light

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Growing concerns regarding information forgery and data leakage necessitate advanced security technologies.
• Existing anti-counterfeiting measures often lack multi-functionality and durability.
• Lanthanide-based materials offer unique luminescent properties for security applications.

Purpose of the Study:

• To engineer lanthanide metallopolymer/polyurethane bilayer polymers for dual-mode anti-counterfeiting.
• To investigate tunable wrinkling behavior for structural coloration.
• To develop a robust and recyclable security platform.

Main Methods:

• Fabrication of bilayer polymers via spin-coating a lanthanide-coordinated metallopolymer onto a polyurethane substrate.
• Induction of topographical transformations through a tensile-release process.
• Characterization of luminescence, wrinkling behavior, and optical diffraction states.

Main Results:

• Achieved multicolor luminescence with broad-spectrum chromatic emission from the metallopolymer layer.
• Demonstrated tunable wrinkling leading to three distinct optical states: diffuse scattering, iridescent rainbow effect, and optical transparency.
• Integrated luminescence and structural coloration for a dual-mode anti-counterfeiting platform with self-healing properties.

Conclusions:

• The developed bilayer polymers provide a versatile and robust solution for anti-counterfeiting applications.
• The combination of luminescence and structural coloration offers enhanced security features.
• These materials surpass current technologies in adaptability and functional sophistication for encryption and hierarchical anti-counterfeiting.