Sperm-like nanopropeller is smallest swimmer ever

 作者:蔚钢     |      日期:2019-03-08 10:11:03
By Jon Evans REMOTE-CONTROLLED nano-devices that look like sperm but mimic the corkscrew motion of flagella may one day deliver drugs to where they are needed in the body. Flagella are the structures some bacteria use to swim through water. Because water is syrupy at small scales, ordinary swimming motions don’t work well. “Picture trying to swim in a pool of asphalt on a hot summer’s day,” says Peer Fischer of The Rowland Institute at Harvard University. Instead,