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 (Delta f) 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 Delta f/f(Max) >= 0.8, acceleration rapidly increased with increasing Delta f/f(Max), and then the acceleration could be very sensitively detected from small changes of Delta f/f(Max).