Artificial Tribotactic Microscopic Walkers: Walking Based on Friction Gradients

Author(s): Joshua P. Steimel, Juan L. Aragones, and Alfredo Alexander-Katz

Pairs of micrometer-sized magnetic beads could “hunt” for chemicals by sensing changes in surface friction.

[Phys. Rev. Lett. 113, 178101] Published Wed Oct 22, 2014