Background: Graphene is a new type of two-dimensional crystal material, and its single
atomic layer structure shows many excellent physical and chemical properties such as large specific
surface area, good electrical conductivity and high Young's modulus. However, few relevant patents
to the topic have been reviewed and cited. This paper mainly deals with the methods of the preparations
of graphene and graphene applications in NEMS sensors, NEMS devices, optics, energy storage,
and biomedical fields.
Methods: At present, compared with the less effective experimental research method, the numerical
simulation method has become an effective research approach. Molecular dynamics is widely used in the numerical simulation
calculation. Molecular dynamics can simulate the change process of graphene in real environments. Molecular dynamics
reveals the microscopic deformation under the action of external load.
Results: The analysis process of two structures is mainly through the external stretched or compressed force exerted on
the graphene. The Young’s modulus of the simulated graphene is about 0.86TPa. The simulated tensile strength is about
121GPa.The resonance frequency of graphene resonators can be changed by the tension of both ends of the beam. As the
initial strain increases, the resonance frequencies also increase. For very small initial axial -strain, the tunable range
reached above several hundred gigahertz. As the initial axial -strain of graphene increased, the tunable range decreased.
Conclusion: Due to the unique properties and potential applications of graphene, it has aroused an extensive research boom
in nano science world. Graphene is considered as one of the most promising materials of next generation electronic devices.