• 文献标题:   A continuum model for the static pull-in behavior of graphene nanoribbon electrostatic actuators with interlayer shear and surface energy effects
  • 文献类型:   Article
  • 作  者:   ROKNI H, LU W
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-8979 EI 1089-7550
  • 通讯作者地址:   Univ Michigan
  • 被引频次:   34
  • DOI:   10.1063/1.4800543
  • 出版年:   2013

▎ 摘  要

Based on multi-beam shear model theory, a continuum mechanics model is developed to investigate the pull-in instability of wedged/curved multilayer graphene nanoribbon (MLGNR) cantilever nanobeams subjected to electrostatic and Casimir forces. The first-order fringing-field correction, the interlayer shear between neighboring graphene nanoribbons (GNRs), surface elasticity, and residual surface tension are incorporated into the analytical model. An explicit closed-form analytical solution to the governing fourth-order nonlinear differential equation of variable coefficients is introduced for the static pull-in behavior of electrostatic nanoactuators using a Fredholm integral equation of the first kind. A comparison study for a [001] silver electrostatic nanoactuator indicates that the proposed analytical closed-form solution yields an improved accuracy over other analytical and numerical methods existing in literature. The results indicate that the interfacial slip between GNRs and the surface material parameters play a significant role in static pull-in behavior of MLGNR electrostatic nanoactuators. From the experimental data and atomistic simulations available in the literature, the value of interlayer shear modulus at the graphene/graphene interface is estimated to be in the order of magnitude of 10(-1) GPa. The continuum model proposed in this study will be helpful for characterizing the mechanical properties of GNRs and the design of graphene-based nanoelectromechanical system devices. (C) 2013 AIP Publishing LLC.