The South Dakota School of Mines and Technology have developed a tiny version of the QR Code with the intention of them being applied to banknotes as a security feature. The QR Code is created by combining microscopic nanoparticles with blue and green fluorescent inks before applying them to the banknote surface using an aerosol jet printer. It is understood that this new security feature won’t be visible to the naked eye, but will instead become detectable under infrared light.
This technology is still being tested by the research team at the university to determine whether a banknote’s wear and tear will alter the readability of the security feature, though they suggest that tests achieved so far have proved it to be durable. This may mean it will soon be ready for mass production.
SMI continues to monitor the progress of this new banknote security technology.