World’s Tiniest Engines Could Power Microscopic Robots

Scientists have created the world’s tiniest practical engines, and these light-powered machines could one day power microscopic robots small enough to enter living cells, the researchers say.

As technological innovations make devices smaller and smaller, scientists are developing machines that are only the size of complex molecules — nanometers, or billionths of a meter, in scale. In comparison, the average human hair is about 100,000 nanometers wide.

One of the main reasons “nanobots” remain in the realm of science fiction is that figuring out a way to make them move has been challenging. Researchers have tried using a variety of power sources and propulsion systems for nanotechnology, but these typically lack speed, strength and control.

– Read more at: LiveScience