If you've ever struggled to get your hand steady enough to scan a QR code while on the go, you should try catching one made by the research team at TU Wien in Vienna, Austria. They have recently managed to create one that "covers an area of just 1.98 square micrometers—smaller than most bacteria."
In TU Wien's most recent blog, it shares the world record it was recently awarded from Guiness, whilst going over its methodology (via TechSpot). To achieve this result, the team etched the QR code into a thin ceramic layer, with individual pixels being just 49 nanometers in size. The record was carried out in conjunction with Cerabyte, a company working on ceramic-based data storage.
