Static and dynamic characteristics of electrostatically actuated graphene bridge resonator

Abstract

Graphene emerges as an important class of material for Nanoelectromechanical System (NEMS) because of their exceptional mechanical properties. We have systematically investigated static and dynamic characteristics of an electrostatically actuated graphene bridge resonator. The graphene bridge resonator has been modelled in finite element software as a 3D device. We have analysed the effect of internal stress and electrostatic actuation force on static and dynamic characteristics of the graphene bridge resonator. Internal stress can be built-up in the graphene sheet due to variation in operating temperature of a NEMS device. We have also investigated the effect of variation of size and nature of end boundary conditions on the static and dynamic characteristics of the electrostatically actuated graphene bridge resonators. It has been found that the natural frequencies of bridge resonator can be considerably tuned by variation of electrostatic actuation force and internal stress. We have also observed that the choice of boundary conditions has a significant role in characterization of graphene bridge resonators.