Bio-friendly micro-motors propelled by polymers

http://www.youtube.com/v/It24DGnotCk?version=3&autohide=1&showinfo=1&autoplay=1&autohide=1&attribution_tag=6mW4yOUGvJaBB4tkHvR-zg&feature=share

Biofriendly Micromotors kickass!  Using a big surface tension gradient is a way to move things really fast.  The motor works by releasing surfactants on one side of the motor after a depolyerization event then moves away from the exhaust of this surfactants then repeats the event.