Modulating the mass sensitivity of graphene resonators via kirigami

Abstract

The unique mechanical properties of graphene make it an excellent candidate for resonators. We have used molecule dynamic to simulate the resonance process of graphene. The kirigami approach was introduced to improve the mass sensitivity of graphene sheets. Three geometric parameters governing the resonant frequency and mass sensitivity of Kirigami graphene NEMS were defined. The simulation results demonstrate that the closer the Kirigami defect is to the central position of the drum graphene, the higher the mass sensitivity of the graphene, showing up to about 2.2 times compared with that of pristine graphene. Simultaneously, the kirigami graphene has a higher out-of-plane amplitude and easy access to nonlinear vibrations, leading to higher mass sensitivity. Besides, the kirigami structure can restrict the diffusion of gold atoms on graphene under high initial velocity or large tension condition. It is evident that a reasonable defect design can improve the sensitivity and stability of graphene for adsorption mass.

Enhanced Pressure Response of Edge-Deposited Graphene Nanomechanical Resonators

“…Also, graphene has an ultrahigh thermal conductivity , and fatigue life, which combined with its high Young’s modulus, , low mass density, , and large surface area make graphene a strong candidate for resonant sensors . Since the first realization of graphene mechanical resonators by Bunch et al, many experimental , and theoretical studies have shown that graphene resonators promise to be ultrasensitive detectors of force, − mass, − and charge …”