title: Effects of higher oscillation modes on TM-AFM measurements.
abstract: The finite element method and molecular dynamics simulations are used for modeling the AFM microcantilever dynamics and the tip-sample interaction forces, respectively. Molecular dynamics simulations are conducted to calculate the tip-sample force data as a function of tip height at different lateral positions of the tip with respect to the sample. The results demonstrate that in the presence of nonlinear interaction forces, higher eigenmodes of the microcantilever are excited and play a significant role in the tip and sample elastic deformations. Using comparisons between the results of FEM and lumped models, how some aspects of the system behavior can be hidden when the point-mass model is used is illustrated.
authors.affiliation: Nano-Robotics Laboratory, Center of Excellence in Design, Robotics and Automation, School of Mechanical Engineering, Sharif University of Technology, P.O. Box 11365-9465, Tehran, Iran.
authors.forename: Hossein Nejat
authors.initials: HN
authors.lastname: Pishkenari
authors.forename: Ali
authors.initials: A
authors.lastname: Meghdari
mesh_terms: D020342:Finite Element Analysis; D018625:Microscopy, Atomic Force / Q000379:methods*; D056004:Molecular Dynamics Simulation; D036103:Nanotechnology; D017711:Nonlinear Dynamics