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(a) Optical image of the chip containing the eight devices based on PtSe2 with labeled pads. The dashed red rectangle surrounds the PtSe2 film. (b) I–V characteristics of the PtSe2-based resistors reported in Table S1. (c) I–V characteristics of the resistors based on MoS2 (blue line) and WSe2 (red line). Inset: sketch of the MoS2 (WSe2) sensor.
