title: Comments on the paper "A comprehensive modeling and vibration analysis of AFM microcantilevers subjected to nonlinear tip-sample interaction forces" by Sohrab Eslami and Nader Jalili.
abstract: This comment on the paper "A comprehensive modeling and vibration analysis of AFM microcantilevers subjected to nonlinear tip-sample interaction forces" by Sohrab Eslami and Jalili (2012) [1] aims to: (1) discuss and elucidate the concept of "virtual resonance" and thus (2) avert a misinterpretation of the experimental results and findings reported in the Tetard et al. Physical Review Letters 106, 180801 (2011) [2].
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA. passianan@ornl.gov
authors.forename: Ali
authors.initials: A
authors.lastname: Passian
authors.forename: Laurene
authors.initials: L
authors.lastname: Tetard
authors.forename: Thomas
authors.initials: T
authors.lastname: Thundat
keywords: AFM; Imaging; MSAFM; Microscopy; Nanomechanical forces; Nonlinear dynamics