Ionizing and Non-Ionizing Radiation Protection Research Center, Paramedical Sciences School, Shiraz University of Medical Sciences, Shiraz, Iran.
Department of Aerospace Engineering, Sharif University of Technology, Tehran, P.O. Box 11365-11155, Iran.
Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
It is well recognized that size-eect often plays a signicant role in the mechanical performance of nano-structures. Herein, strain gradient continuum elasticity is employed to investigate the size dependent pull-in instability of the cantilever nanoactuators immersed in ionic liquid electrolyte. The presence of dispersion forces, i.e. Casimir and van der Waals eld, is considered in the theoretical model as well as the double-layer electrochemical attraction. To solve the non-linear constitutive equation of the system, two approaches, i.e. the Rayleigh Ritz Method (RRM) and the numerical solution method, are employed. Impact of the size dependency and dispersion forces on the instability characteristics are discussed as well as the eect of ion concentration in liquid.