WEB DESK: Researchers have engineered a microscopic QR code, smaller than most bacteria, offering a groundbreaking approach to data preservation. A team from Vienna University of Technology utilized charged particle beams to inscribe this functional QR code onto a specialized ceramic material, enabling it to be stored and retrieved for hundreds of years.
With a size of just 1.98 square micrometers, this achievement has been officially recognized by Guinness World Records. The tiny QR code, which links to the university’s website, is invisible to the naked eye and can only be detected using an electron microscope.
“The structure we’ve created is so minuscule that it cannot be seen with optical microscopes,” explained Professor Paul Mayrhofer from the university’s Institute of Materials Science and Technology. “What’s truly impressive is that this is a stable, durable, and repeatedly scannable QR code, despite its microscopic size.”
This breakthrough was made possible by employing thin ceramic films, commonly used in coating high-performance cutting tools. The approach ensures that the QR code remains intact even under extreme conditions, thanks to the durability of the ceramic.
Scientists assert that such engraved ceramic QR codes could last centuries longer than current magnetic or electronic storage media.
“In this digital age, we rely on storage media that are surprisingly fragile and short-lived,” noted Alexander Kirnbauer, a senior researcher at the university. “Our method is akin to ancient practices of inscribing knowledge into enduring, inert materials designed to withstand the test of time and remain accessible for future generations. Since ceramic doesn’t require power or maintenance, the information is preserved passively.”
If scaled for larger applications, this technology could potentially store over two terabytes of data within the space of a single A4 sheet of paper.
The research team is now exploring ways to enhance this technique, including testing different materials, increasing writing speed, and developing scalable manufacturing processes suitable for industrial use.
