Inventing a new nano code board helps counterfeit goods

Scientists from the University of Mining and Technology, South Dakota (SDMT - France) said on September 12 that they have invented an invisible card using a "quick response" code called QR , Very useful in detecting counterfeit money as well as criminals who trade in alcohol and illegal drugs.

Published in Nano Technology (UK), material research engineers from SDMT led by Jon Kellar said the new invention includes a QR code made from nanoparticles combined with ink. Fluorescent in blue and green.

QR code is a square containing black and white pixels, which can be scanned by a smartphone, then connected to an Internet address and we can view the obtained data.

The nanoparticles in the QR table absorb photons (photons) at invisible wavelengths but emit a visible wavelength, with the procedure called internal transformation (upconversion) helping the QR code turn on up "magic rays" and allow the self-scanning process to take place.

QR is integrated with standard computer aided design (CAD) device, sprayed onto the surface of paper, plastic film, office tape and glass using an aerosol inkjet printer. This encoding will maintain the invisible status until the goods to be inspected are illuminated by an infrared beam in the near position.

Scientists have also looked closely at the pressure of the above code when scanning thick banknotes, by choosing a random sheet of paper and folding it up to 50 times. The results show that even if the stack of thick paper does not affect the readability and scanning of the code of the code.

Jon Kellar, who led the study, said: "We have done tests on ink wear and the results show that the ink is very durable."

New equipment promises to be used in many museums, companies want more information on product lines, exhibitions, and services. This will be a particularly useful and time-saving device in validating the quality and origin of goods.

Engineers are continuing to research to upgrade more modern code to deal with both the most sophisticated and cunning criminals.