Researchers Build Microscopic Gears Powered by Light in Milestone for Nano-Scale Machines
In brief Scientists etched working gear trains on a chip, driven solely by photon momentum. The devices could someday power microfluidic pumps, reconfigurable optics, and tiny surgical tools. Efficiency remains extremely low, making the work an elegant proof-of-concept, not a product. Researchers have built microscopic machines—complete with working gears, racks, and pinions—that run entirely on…
