All These Micromotors Need Is Light
We've all seen those pictures of cogs and gears just millionths of a inch across. And predictions that tiny machines will one day move through the body dispensing drugs or performing other tasks in the microworld have become commonplace (see BW Online, 12/7/00, "These Minuscule Motors May Herald a New Medical Era"). But the researchers turning out the parts to make tiny devices face a major challenge -- finding ways to power microscopic pumps and propulsion systems.
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