Three-Dimensional Printable Triple-Bonded Polymer Nanoparticles for Invisible Information Encryption and Robust Anti-Counterfeiting

In the evolving landscape of information encryption technologies, the integration of optical materials into three-dimensional (3D) codes has emerged as a promising solution. However, current approaches were limited by coding capacity, detective permeability, and a complicated preparation process. Addressing this gap, we present an approach involving the development of 3D embedded, invisible Raman codes with chemical vibrations employing 3D-printable triple-bonded nanoparticles. These colorless triple-bonded nanoparticles, characterized by the distinct and stable spectral features of spontaneous Raman scattering, ensure high transparency, durability, and coding capacity. By embedding multiple, visually undetectable Raman-based QR codes within the internal structure of 3D printed objects, rather than using visible measures on 2D surfaces, our multilayered encryption system significantly enhances the information security by invalidating single-layer decoding attempts and requiring the combination of multiple layers to decrypt the embedded information. This innovative approach offers superior security and robustness in information security.