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Twisting tests of the GFET nanosensor. a) The nanosensor mounted on a PDMS substrate for twisting tests. b) Transconductance and carrier mobility of the nanosensor at different twisting angles. c) Transconductance and carrier mobility of the nanosensor after 0 to 200 cycles at a twisting angle of 180°. d) Detection of TNF-α at concentrations ranging from 0.05 to 100 × 10−9 M at different twisting angles.
