WHIPLIKE TAILS, found on many bacteria, are propelled by nanomotors. The tiny biochemical motor turns a rotary shaft that spins the tails, or flagella, and allows the bacteria, such as these E. coli, to move through liquid. Image: -JEFF JOHNSON Hybrid Medical Animation
Among the promised fruits of nanotechnology, small machines have always stood out. Their attraction is straightforward. Large
machines--airplanes, submarines, robotic welders, toaster ovens--are unquestionably useful. If one could take the same ideas used to design
This article was originally published with the title The Once and Future Nanomachine.