Illustration of how the micron-scale swimming robot responds to light (Image: Alexander Alexeev/Georgia Tech)
How small can a robot get? According to a team of researchers at Georgia Tech, really, really small. Described in the July 23 issue of the journal Soft Matter, the Georgia Tech team has been running complex computational models of swimming robots on the micron (0.001 mm or about 0.000039 inches) scale. At this microscopic level, water takes on very different properties from those of the human scale, but despite these challenges the team believes that such robots could have fascinating practical applications.