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We report the observation of self-oscillations in a bottom-upnanoelectromechanical system (NEMS) during field emission driven by a constantapplied voltage. An electromechanical model is explored that explains thephenomenon and that can be directly used to develop integrated devices. In thisfirst study we have already achieved ~50% DC/AC (direct to alternative current)conversion. Electrical self-oscillations in NEMS open up a new path for thedevelopment of high speed, autonomous nanoresonators, and signal generators andshow that field emission (FE) is a powerful tool for building newnano-components.

Self-oscillations in field emission nanowire mechanical resonators: a nanometric DC-AC conversion