Wireless Powered Programable Swimming Robots Driven by Lamb Wave Resonators

Microrobotics have emerged as a fascinating field with great potential for drug delivery, non-invasive microsurgery, and precise materials assembly. Acoustic devices have been exploited as effective strategies for developing underwater microrobotics. This work presents an integrated wirelessly powered microelectromechanical swimming robot driven by Lamb Wave Resonators (LWRs). Improvements have been made to the structure of LWR driver. The asymmetric distribution of reflectors and leakage hole of the LWR leads to the difference of acoustic wave transmission. Unidirectional drive was realized with the asymmetric acoustic streaming effect. Aided by programming the energy distribution of the LWRs, flexible 2-D motions can be realized, demonstrating an artificial acoustic compartment for tiny swimmers.