A tunable nanostructure such as a nanotube is used to make an electromechanical oscillator. The mechanically oscillating nanotube can be provided with inertial clamps in the form of metal beads. The metal beads serve to clamp the nanotube so that the fundamental resonance frequency is in the microwave...http://www.google.de/patents/US8120448?utm_source=gb-gplus-sharePatent US8120448 - High frequency nanotube oscillator
