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Getting the latest healthcare news for you
Getting the latest healthcare news for you
Microscopic robots that run on light can now track down bacteria, scoop them up, and drop them off exactly where scientists want them. Developed at the University of Würzburg, these sub-micrometer devices use photon recoil and polarized light for propulsion and steering. Think of them as futuristic, microscopic cleaning crews for the biological world.
Microscopic robots that run on light can now track down bacteria, scoop them up, and drop them off exactly where scientists want them.
Researchers at Julius-Maximilians-Universität Würzburg (JMU) have developed light-driven nanorobots smaller than one micrometer — roughly 50 times thinner than a human hair — that can navigate liquid environments, collect bacteria, and deposit them at chosen locations. The robots are powered by photon recoil: tiny plasmonic nanoantennas absorb and redirect light, generating just enough force to propel and accelerate these ultra-lightweight devices. Steering is achieved by changing the polarization of incoming light, which causes built-in antenna wires to reorient the robot's direction.
In lab tests, the nanorobots performed rapid 90° turns to efficiently scan sample areas, captured significant clusters of bacteria, and remained maneuverable even while carrying their bacterial "cargo" — though at reduced speed.
Key Takeaways
Why it matters: The ability to precisely handle individual bacteria and cells opens doors for targeted drug delivery, infection research, and next-generation diagnostics — bringing the concept of microscopic robotic medicine meaningfully closer to reality.
