For those of us who weren't paying attention, over the last few years, scientists around the world have been one-upping each other in a bid to create the smallest QR code that can be reliably read.

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Just how small can a QR code be? Small enough that it can only be recognized with an electron microscope. A research team at TU Wien, working together with the data storage technology company Cerabyte ...

A team of researchers at TU Wien recently announced that they have "etched" the smallest QR code ever on a ceramic film. Covering an area of ...