Scientists create world’s smallest QR code in data storage breakthrough

A QR code measuring just 1.98 square micrometres can store data for centuries - (TU Wien)

Scientists have created a QR code that is smaller than most bacteria, offering a novel way to store data.

Using beams of charged particles, a team from Vienna University of Technology in Austria engraved the working QR code onto a special type of ceramic that allows it to be stored and read for centuries.