Nano QR Code Could Store Terabytes for Centuries
News Desk
Vienna: In a breakthrough that could redefine long-term data preservation, scientists have created what is believed to be the world’s smallest functional QR code, opening new possibilities for storing information in ultra-durable materials.
Researchers at the Vienna University of Technology engineered the microscopic code using beams of charged particles, engraving it onto a specialised ceramic surface.
Measuring just 1.98 square micrometers, smaller than most bacteria, the achievement has been officially recognised by Guinness World Records.
Despite its minuscule size, the QR code remains fully functional and directs users to the university’s website. However, it cannot be seen with conventional optical microscopes and requires an electron microscope to be read.
Professor Paul Mayrhofer from the Institute of Materials Science and Technology said the structure is so fine that it is invisible under visible light, but its true significance lies in its stability and repeat readability over time.
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The innovation relies on thin ceramic films, typically used as protective coatings for high-performance tools. These materials allow the engraved data to withstand extreme conditions without degrading, making them far more durable than traditional storage media.
Scientists say this method could preserve information for centuries, far exceeding the lifespan of current magnetic and electronic storage systems.
Senior scientist Alexander Kirnbauer noted that modern society depends on fragile storage technologies, prompting the team to explore more enduring alternatives inspired by ancient inscription techniques.
Unlike conventional storage devices, the ceramic-based system requires no electricity or maintenance, ensuring that the stored data remains intact and accessible for future generations.
If successfully scaled, the technology could store more than two terabytes of data within an area the size of a single A4 sheet of paper. Researchers are now working to refine the process by testing other materials, improving writing speeds, and developing methods for large-scale industrial use.
