Figure 3 .
Resonance behavior of graphene in nonlinear oscillation. (a) Resonance curves of a graphene resonator (with its size of D = 250 nm) as a function of actuation amplitude p0. (b) Dimensionless parameter θ, which represents the degree of nonlinearity in the vibration of a graphene resonator, as a function of actuation amplitude p0.
Dai et al. Nanoscale Research Letters 2012 7:499 doi:10.1186/1556-276X-7-499