Figure 2 .

Resonance behavior of graphene in harmonic oscillation. (a) Resonance curve of a squared graphene resonator with a size of D = 6 μm, where a graphene operates in harmonic oscillation driven by an actuation amplitude of p0 = 10−3 aN. (b) Resonant frequencies of graphene resonators operating in harmonic oscillation as a function of not only their size but also the boundary conditions. (c) Resonant frequencies of a graphene as a function of pre-strain applied to it.

Dai et al. Nanoscale Research Letters 2012 7:499   doi:10.1186/1556-276X-7-499
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