This paper investigates the pull-in instability of a nano-switch under electrostatic and intermolecular Casimir forces. The analysis is based on the geometrically non-linear Euler-Bernoulli beam theory with consideration of the surface energy. Through differential quadrature method (DQM), the pull-in voltages of the nano-switch are obtained. Results show that the effect of surface energy and geometrically non-linear deformation on the pull-in voltage depends on the length, height and initial gap of the nano-switch. In addition, the effect of intermolecular Casimir force on the pull-in voltage weakens as the initial gap increases.
Wang, K., & Wang, B. (2014). Influence of surface energy on the non-linear pull-in instability of nano-switches. International Journal of Non-Linear Mechanics, 59, 69-75. https://doi.org/10.1016/j.ijnonlinmec.2013.11.004