▎ 摘　　要

MXene has emerged as a promising material for various optoelectronics applications. In view of the advanced properties of MXene, surface plasmon resonance (SPR)-based sensor utilising graphene-Ti3C2Tx MXene hybrid nanostructure is proposed for sensitivity enhancement. The sensor's performance is theoretically demonstrated in terms of sensitivity and detection accuracy at incident light wavelength of 633 nm for a broad analyte refractive index (RI) range (1.33-1.36). Further, the effect of increasing Ti3C2Tx MXene layers on the sensitivity is analysed. In addition, a significantly high average sensitivity is demonstrated at 532 nm for analyte RI in the vicinity of 1.32. This work will open new possibilities for graphene-Ti3C2Tx MXene-based hybrid nanostructures in SPR-based bio- and gas-sensors.