Key points from article :
Motor is a paddle-like chain of atoms that spins when activated by a light source.
Spin between at 2-3 million times per second to overcome molecules and outpace Brownian motion.
The nanometer wide motors could locate specific cells of interest.
Takes at least a minute for a motor to tunnel through a membrane.
Highly unlikely that a cell could develop a resistance to molecular mechanical action.
The study was published in the Nature journal.
