In the world of drug-delivering nanobots, Eric Lauga and Joseph Wang from the University of California, San Diego were inspired by natural microscopic swimmers such as E. coli and made nanowires that can be propelled through liquid with an external magnetic field. They found that flexible nanowires move with speed approaching natural microscopic swimmers like E. coli, much better than the artificial propellers inspired by the flagella of bacteria that other researchers have been working on. Still, at this point it's still a long way from anything practical. Lauga and Wang still have no idea how they would attach a payload of drugs to the nanowires for delivery. Story