Phosphorus doped armchair graphene nanoribbon as a sensing platform of NH3 detection: A DFT investigation

Abstract

The variation in geometrical and electronic properties of armchair graphene nanoribbon (AGNR) along with pristine and phosphorus (P-AGNR) doped configuration in the presence of ammonia gas (NH3) have been identified in this work. The density functional theory based calculations have been performed in order to detect and equate the sensitivity of modified armchair graphene nanoribbon towards NH3 sensing. Further, the variation in geometrical and electronic properties of AGNR and P-AGNR have been analyzed by considering the cohesive energy, band structure, density of states, and conductance. Hence, our findings shows that P doped AGNR can upsurge its sensitivity towards NH3 gas by the order of 106 times owing to the enhancement in the conductance. Overall, results shows the great potential in the area of designing the graphene nanoribbon based sensors.