Micromotor

Micromotors are very small particles (measured in microns) that can move themselves. These micromotors actually propel themselves in a specific direction autonomously when placed in a chemical solution. A set of oxidation-reduction reactions produce a stream of bubbles that then propels these micromotors through the chemical media. Spherical micromotors are called Janus spheres, because they are composed of two different materials, like the two-faced Roman god of change Janus.