Congratulations to UF ECE and IMG Ph.D. student Tahmid Kaisar, Prof. Philip Feng, and their collaborators, on their recent journal publication in Nano Letters, titled “Nonlinear Stiffness and Nonlinear Damping in Atomically Thin MoS2 Nanomechanical Resonators.” In this paper, the authors report on experimental measurements and quantitative analyses of nonlinear dynamic characteristics in ultimately thin nanomechanical resonators built upon single-layer, bi-layer, and tri-layer (1L, 2L, & 3L) molybdenum disulfide (MoS2) vibrating drumhead membranes. This study provides the first quantification of nonlinear damping and frequency detuning characteristics in 2D semiconductor nanomechanical resonators and elucidates their origins and dependency on engineerable parameters, setting a foundation for future exploration and utilization of the rich nonlinear dynamics in 2D nanomechanical systems. Paper link: https://pubs.acs.org/doi/10.1021/acs.nanolett.2c02629#
