Programmable Multifunctional Gels with On-Demand Patterning Capability toward Hierarchical and Multi-Dimensional...

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Hydrogels with optical switching are key for information encryption and anti-counterfeiting.
• Existing gel platforms face challenges in multistage patterning, multi-dimensional encryption, and long-term stability.

Purpose of the Study:

• To develop versatile, programmable gels with enhanced stability and multi-dimensional encryption.
• To create a novel platform for high-security information encryption and anti-counterfeiting applications.

Main Methods:

• Fabrication of multifunctional gels using glycidyl methacrylate functionalized graphene quantum dots and Al3+ cross-linked gelatin and polyacrylic acid.
• Utilizing mask photopolymerization or welding for hierarchical pattern encryption.
• Implementing Fe3+-ethylenediaminetetraacetic acid disodium (EDTA·2Na) for reversible shape memory and fluorescence switching.

Main Results:

• Gels exhibit remarkable anti-swelling (<0.1%), anti-freezing (<-70 °C), and anti-dehydration (>3 months) properties.
• Demonstrated solvent-induced reversible transparency, adjustable fluorescence, and self-healing (86% stress, 94% strain).
• Achieved on-demand hierarchical and multi-dimensional encryption with fluorescence quenching for high security.

Conclusions:

• The designed multifunctional gels offer a robust platform for advanced information encryption and anti-counterfeiting.
• The programmable nature and synergistic effects of gel properties enable hierarchical and multi-dimensional security.
• This strategy opens new avenues for secure data storage and authentication.