Investigation of Stability and Electromechanical Properties of a Nano Capacitor Made of Two Graphene Sheets

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Borhanpanah Mooshaki, Mohammad Reza | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44876 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Dehghani Firouz-Abadi, Rouhollah
Abstract:
Investigation of electrostatic properties of a nano capacitor made of graphene sheets, is the aim of current research. This nano capacitor is made of two adjacent parallel gr¬aphene sheets. Applying a voltage make an electric field between the sheets, which attracts the sheets together. This change in geometry, affects the electric field between sheets, therefore, the sheet's deformation and the electric field between them are coupled to each other. For modeling the deformation of the sheets, molecular dynamics analysis is employed. The electrostatic equations are used for modeling the electric field. The electric field is assumed to be static in this research, which means that the electrical frequencies are much more than the structural ones. First, natural frequencies and mode shapes of graphene are extracted using molecular dynamic analysis. Then the governing equation of coupled electromechanical system is driven and natural frequencies and mode shapes of the coupled system are obtained using Eigen value analysis. Finally the time response of the electromechanical system is obtained using Ritz's method
Keywords:
Molecular Dynamics ; Electromechanical Properties ; Nanocapacitor ; Graphene Sheet ; Free Vibration