<p>Under one aspect, a resonator includes a nanotube element including a non- woven fabric of unaligned nanotubes and having a thickness, and a support structure defining a gap over which the nanotube element is suspended, the thickness of the nanotube element and the length of the gap being selected to provide a pre-specified resonance frequency for the resonator. The resonator also includes a conductive element in electrical contact with the nanotube element; a drive electrode in spaced relation to the nanotube element; and power logic in electrical contact with the at least one drive electrode. The power logic provides a series of electrical pulses at a frequency selected to be about the same as the pre-specified resonance frequency of the resonator to the drive electrode during operation of the resonator, such that the nanotube element responds to the series of electrical pulses applied to the drive electrode by making a series of mechanical motions at the resonance frequency of the resonator.</p>
