In this paper, we report on molecular dynamics (MD), continuum (based on linear and nonlinear beam theories) and combined molecular dynamics/continuum simulation of carbon nanotube based nanoelectromechanical switches. As a prototype device, we study the pull-in voltage characteristics of a nanoelectromechanical switch made of a suspended single wall nanotube over a ground plane. The various simulations (MD, continuum and combined MD/continuum) have been performed accounting for the electrostatic and van der Waals forces between the nanotube and the ground plane. The results from the nonlinear continuum theory compared well with the results from MD, except, for cases, where nanotube buckling was observed. When buckling occurs, the electromechanical behavior of the switch is simulated by employing a combined MD/continuum approach. The combined MD/continuum approach is computationally more efficient compared to the MD simulation of the entire device. Static and dynamic pull-in, pull-in time and fundamental frequency analysis is presented for fixed-fixed and cantilever carbon nanotube switches.
Static and Dynamic Analysis of Carbon Nanotube-Based Switches
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division June 20, 2003; revision received March 1, 2004. Associate Editor: Y. Huang.
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Dequesnes , M., Tang, Z., and Aluru, N. R. (June 29, 2004). "Static and Dynamic Analysis of Carbon Nanotube-Based Switches ." ASME. J. Eng. Mater. Technol. July 2004; 126(3): 230–237. https://doi.org/10.1115/1.1751180
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