Oscillators composed of incommensurate graphene sheets have been investigated by molecular dynamics simulations. The oscillation frequencies can reach tens of gigahertz range and depend on the surface energy of the bilayer graphene and the oscillatory amplitude. We demonstrate the tunability of such an oscillator in terms of frequency and friction by its varying geometric parameters. Exploration of the damping mechanism by combining the autocorrelation function theory and the direct atomistic simulations reveals that the friction force is proportional to the velocity of oscillatory motion. The results should help optimize the design of graphene-based nanoelectromechanical devices.
Tunable Gigahertz Oscillators of Gliding Incommensurate Bilayer Graphene Sheets
Manuscript received January 13, 2013; final manuscript received March 21, 2013; accepted manuscript posted April 8, 2013; published online May 31, 2013. Editor: Yonggang Huang.
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Luo, M., Zhang, Z., and Yakobson, B. I. (May 31, 2013). "Tunable Gigahertz Oscillators of Gliding Incommensurate Bilayer Graphene Sheets." ASME. J. Appl. Mech. July 2013; 80(4): 040906. https://doi.org/10.1115/1.4024170
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