nano propellers through the vitreous humor of the eye to deliver medicine to the retina professor perry fisher at the max planck institute for intelligent systems in stuttgart is among the scientists who are developing these nano robots. by the end victim down now in developing the nano propeller we found inspiration in bacteria we recreate all the screw like structure that enables bacteria to move because when you rotate a corkscrew it moves forward all that's what makes. the nano propellers are made by a pariahs in silicon dioxide and other materials including iron onto a copper or silicon wafer under high vacuum while it rotates. the way for is already coated with tiny polymer particles. and each one a hey look old nano propeller is born out of the vapor. this way for is covered in billions of these nano propellers. you need a microscope to see them. they are very small and they fit to the mesh of the vitreous they are only 500 i don't mean they're in that either until like all so they can easily be sneaked through the mesh of the vitreous. the propellers have to be harvested from the way f