Nanowerk December 5, 2024
An international team of researchers (Republic of Korea, USA – University of Chicago) developed a scalable and cost-efficient method for producing multiplexed plasmonic colors by in situ photoreducing AgNPs within microgel architectures with controlled porosity. They used digital micro-mirror device (DMD)-based flow microlithography system combined with a programmable dithering-mask technique to synthesize shape or barcoded microparticles with large-scale, high-resolution images embedded with hidden multiplexed plasmonic colors. Quantitative agreement was achieved between chemically encrypted and optically decrypted plasmonic colors using a deep learning classifier. According to the researchers their work paves a new way for hidden data storage, secure optical labeling, and anti-counterfeiting technologies… read more. TECHNICAL ARTICLE