Microscopic robot would use laser pulses to walk through the body
One day microscopic robots could be crawling through your body, clearing out disease or delivering drugs. And now we’re one step closer to that future, as scientists from Cornell University have created tiny robots powered by pulses of laser light.
First presented at a conference last year, the micro-robots look fairly simple in their design. They’re about five microns thick, 40 microns wide and between 40 and 70 microns long, roughly the size of a single-celled organism like a paramecium. Their bodies contain a simple silicon photovoltaic circuit that powers their legs, which are made of electrochemical actuators.