Nanotechnology Now
Droplets with tail-like filaments. Credit: Emily Lin.
Abstract:
By combining oil drops with water containing a detergent-like substance, the scientists found they could produce artificial swimmers that are able to swim independently and even harvest energy to recharge.
Scientists create rechargeable swimming microrobots using oil and water
London, UK | Posted on July 16th, 2021
The oil droplets use fluctuating temperature changes in their surrounding environment to store energy and to swim. When cooled, the droplets release thin 'tail-like' threads into the environment. The friction generated between the tails and surrounding fluid, pushes the droplet causing them to move. On heating, the droplets then retract their tails returning to their original state, and harness the heat from their environment to recharge.