\textbf{Enhancing the performance of Graphene NEMS}*

In recent past Nanoelectromechanical systems (NEMS) have got several sensing based applications such as force, spin, charge and mass sensors. These devices due to their smaller size, operate in very high frequency regime (MHz - GHz) and have very high quality factors (10$^{2}$ -10$^{5})$. Nevertheless these devices are limited by their comparatively smaller linear operational range. Electromechanical devices based on 2D materials are extremely sensitive to strain. We studied the effect of strain on the performance of single layer Graphene NEMS. Our results reveal that the strain in Graphene NEMS can be tuned to increase the linear operational range. We report a 25 dB increase in dynamic range by tuning the strain from 10$^{-3\, }$at room temperature to 10$^{-2}$ at 200K. This increase in dynamic range is also accompanied by partial cancellation of elastic and electrostatic nonlinearities. The resulting mass resolution estimated from the experimental data is 100 yg...................$^{1}$ which is one order of magnitude better than previously reported values. Reference: 1. Parmar, M. M., Gangavarapu, P. R. Y. {\&} Naik, A. K. Dynamic range tuning of graphene nanoresonators. \textit{Applied Physics Letters} \textbf{107,} 113108 (2015).