▎ 摘　　要

Graphene nanoribbon (GNR) based nanoelectromechanical resonator (NEMR) has been proposed theoretically at nanoscale by means of calculating its vibrational characteristics such as frequency emitted, electromechanical coupling coefficient (EMCC) and Q-factor under reverse piezoelectric mechanism. With the aid of these potential parameters, an attempt is made to propose the device that may function as a force sensor. Though pristine graphene exhibits non-piezoelectric behavior, the suitable doping can convert it into piezoelectric nanomaterial. In the present investigation, the doped form of GNR has been considered wherein fluorine (F), lithium (Li) and potassium (K) are considered as dopants. The calculated Q-factor of the proposed device is found in the order of 10(4)-10(2) for the temperature range of 200 K-300 K. Moreover, for the same temperature scale, considering the proposed device as a force sensor, its calculated force sensitivity is found 5.8-29.5 aN/ root Hz for Li doped, 7.09-36.42 aN/ root Hz for F doped and 6.21-31.87 aN/ root Hz for K doped graphene (1 aN = 10(-18) N). The present Hz analysis suggests the breakthrough for further development of high frequency actuation using 2D nanoscale actuating systems. Therefore, outcome of the work is pivotal for (i) various nanoscale electromechanical applications and (ii) designing graphene-based pressure sensor.