Researchers design self-powered robots the size of human cells

The latest robots out of MIT are small enough to float “indefinitely” in the air. Researchers accomplished the feat by attaching 2D electronics to colloids — tiny particles measuring around one-billionth to one-millionth of a meter. All told, the devices are roughly the size of a human egg cell.What’s more, the addition of photodiode semiconductors means the tiny individual systems are able to to be self-powered, without the need for a battery. The system converts light i