Abstract
Thoroughly understanding the dynamic behavior of two-dimensional molybdenum disulfide (MoS2) is extremely important to the MoS2-based nanoelectromechanical device. In this paper, the circular Mindlin plate model (CMPM) is proposed to investigate the temperature-induced vibration of circular single-layered MoS2 (CSLMoS2). When the size of the CSLMoS2 is very small, the natural frequencies calculated by the CMPM are closer to the natural frequencies calculated by molecular dynamic (MD) simulations than those calculated by the circular Kirchhoff plate model (CKPM). The frequencies obtained by the CMPM are closer to the MD results than those obtained by the CKPM when in the higher-order frequencies. The root-mean-squared (rms) amplitude of CSLMoS2 is calculated by the CMPM, the CKPM, and MD simulations. The rms amplitude of CSLMoS2 calculated by the CMPM is much larger than that calculated by the CKPM. The comparison of the rms amplitude calculated by MD simulations shows that both CMPM and CKPM can roughly predict the temperature-induced vibrational behavior of CSLMoS2. However, the rms amplitude forecasted by the CMPM is more accurate than that calculated by the CKPM. The CMPM can forecast the thermal vibration of CSLMoS2 well.
Highlights
Molybdenum disulfide (MoS2) with a honeycomb structure has become one of the most popular two-dimensional (2D) materials. 2D graphene lacks the bandgap that makes it unattractive in the application of semiconductor technology.1 MoS2 has a high bandgap, which can fabricate semiconductor devices.2–5 MoS2 has application in nanoelectromechanical systems because it exhibits superior mechanical properties.6,7 many investigations on the mechanical properties of MoS2 have been reported in recent years.8–10The dynamic behavior is important in the mechanical properties of nano-scale structures
The circular Mindlin plate model (CMPM) and molecular dynamics (MD) simulations are utilized to explore the temperature-induced vibration of circular single-layered MoS2 (CSLMoS2)
Compared to the MD simulation results, the resonant frequencies calculated by the CMPM are more accurate than that calculated by the circular Kirchhoff plate model (CKPM) when the size of CSLMoS2 is very small
Summary
Molybdenum disulfide (MoS2) with a honeycomb structure has become one of the most popular two-dimensional (2D) materials. 2D graphene lacks the bandgap that makes it unattractive in the application of semiconductor technology. MoS2 has a high bandgap, which can fabricate semiconductor devices. MoS2 has application in nanoelectromechanical systems because it exhibits superior mechanical properties. many investigations on the mechanical properties of MoS2 have been reported in recent years.8–10The dynamic behavior is important in the mechanical properties of nano-scale structures. 2D graphene lacks the bandgap that makes it unattractive in the application of semiconductor technology.. MoS2 has a high bandgap, which can fabricate semiconductor devices.. MoS2 has application in nanoelectromechanical systems because it exhibits superior mechanical properties.. The dynamic behavior is important in the mechanical properties of nano-scale structures. Jiang et al. studied the dynamic behavior of circular single-layered MoS2 (CSLMoS2) over a circular hole utilizing the circular Kirchhoff plate model (CKPM) and molecular dynamics (MD) simulations. Shahabodini et al. utilized the multiscale approach to analyze the vibration of graphene sheets on Winkler foundation. Jiang and Wang analyzed the vibrational behavior of double-walled carbon nanotubes with an elastic boundary condition utilizing the double Timoshenko beam model. Ebrahimi and Barati presented the dynamic behavior of a biaxially compressed bilayer graphene sheet adopting the nonlocal strain gradient theory.
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