The theoretical prediction of the structural characteristics and SO2 adsorption-sensing properties of pristine HfS2 and TM-doped HfS2 monolayers (TM = Ni, Pd, or Pt)

(Left panel) A schematic of SO 2 gas sensor devices with two Au electrodes and a central region based on TM doped HfS 2 monolayers (TM = Ni, Pd or Pt). (Right panel) I – V relationship of the Pt-doped HfS 2 monolayer-based sensor.