Sensitivity of Graphene-Nanoribbon-Based Accelerometer with Attached Mass

We investigate ultrahigh sensitivity accelerometers based on graphene-nanoribbon-resonators including an attached mass by performing molecular dynamics simulations. Sensing acceleration can be achieved by detecting the resonance frequency (f) or the resonance frequency shift (Δf) of the graphene-nanoribbon-resonator. The acceleration as a function of frequency was regressed by a power function and shown to have a linear relationship on a log–log scale. As the attached mass increased, the sensitivity decreased whereas the sensing range remained constant. When the reference frequency (f _Max) was defined as the limit of the sensing range, acceleration could be sensed by fitting the function of f/f _Max regardless of the attached mass. When Δf/f _Max ≥ 0 8, acceleration rapidly increased with increasing Δf/f _Max, and then the acceleration could be very sensitively detected from small changes of Δf/f _Max.