Scientists develop cheap, high-efficiency, easy-to-read digital encoding/ data storage system using fluorescent pixels

https://techxplore.com/news/2024-09-scientists-digital-encoding-fluorescent-pixels.html

"pixel system using microcapsules containing a mixture of fluorescent dyes and phase change paraffins, which absorb/ emitting heat in response to change in temperature or voltage, changing the color of the light they emit... three dimensions would be determined by the position (2D, like in QR codes) and colors (3D) of the pixels, while the fourth dimension is regulated by the material's response to temperature... 3D cybersecurity/ anti-counterfeiting encryption, 4D high-density data storage"