Scaling Law in Carbon Nanotube Electromechanical Devices
R. Lefevre, M. F. Goffman, V. Derycke, C. Miko, L. Forro, J. P. Bourgoin, P. Hesto
Abstract
We report a method for probing electromechanical properties of multiwalled carbon nanotubes(CNTs). This method is based on AFM measurements on a doubly clamped suspended CNT electrostatically deflected by a gate electrode. We measure the maximum deflection as a function of the applied gate voltage. Data from different CNTs scale into an universal curve within the experimental accuracy, in agreement with a continuum model prediction. This method and the general validity of the scaling law constitute a very useful tool for designing actuators and in general conducting nanowire-based NEMS.
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