Dynamic range of nanotube- and nanowire-based electromechanical systems

Postma, H. W. Ch.; Kozinsky, I.; Husain, A.; Roukes, M. L.
May 2005
Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p223105
Academic Journal
Nanomechanical resonators with high aspect ratio, such as nanotubes and nanowires are of interest due to their expected high sensitivity. However, a strongly nonlinear response combined with a high thermomechanical noise level limits the useful linear dynamic range of this type of device. We derive the equations governing this behavior and find a strong dependence [∝d√(d/L)5] of the dynamic range on aspect ratio.


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