Electromagnetic instability analysis of nano-sensor

Abstract

The enormous increase in the application of nano-electromechanical systems for biological purposes, as well as modern sensors in the particle accelerators, leads to new operation situations for these devices, such as an external magnetic field. While different physical phenomena on the behavior of nano-electromechanical systems have been addressed, few researchers have focused on the magnetic flux’s inspiration on the performance of electromechanical nano-sensors. In this paper, the dynamic electromagnetic instability of nano-sensors immersed in an external magnetic flux is simulated. As nano-structures have a considerable surface-to-volume ratio, the constitutive equation is developed by incorporating surface energies. The impact of finite dimensions is taken into account in the developed model by using corrected relations for electrical and van der Waals force. The nonlinear dynamic behavior of the system is investigated by employing the Galerkin method. We find that the magnetic flux can significantly reduce the dynamic instability threshold of the nano-sensors.