  Electromechanical actuators exploit the Lorentz force law to convert
electrical energy into rotational or linear mechanical energy. In these
electromagnetically induced motions, the electrical current flows through wires
that are rigid and consequently the types of motion generated are limited.
Recent advances in preparing liquid metal alloys permit wires that are
flexible. Such wires have been used to fabricate various forms of flexible
connections, but very little has been done to use liquid metal as an actuator.
In this paper we propose and have tested a new type of motor using liquid metal
conductors in which radial (or breathing) modes are activated.
