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. 2022 Jan 31;13:574. doi: 10.1038/s41467-022-28235-6

Fig. 2. Current rectification modulated by the sweeping speed/direction.

Fig. 2

a–c Response of current–voltage (I–V) curves to sweeping speed with a sinusoidal voltage sweeping semi-cycle of (0 V→+ 3 V→0 V), (0 V→−3 V→0 V), and full-cycle of (0 V→−3 V→+ 3 V→0 V), respectively; I–V curves are consecutively measured at a gradually lower sweeping speed ranging from 12.0 V/s to 1.2 V/s. The numbers 1-4 denote the sweeping sequence. d Response of I–V curves measured by the forward voltage sweeping (−3 V→+ 3 V) and backward voltage sweeping (+3 V→−3 V) at a different sweeping speeds ranging from 12.0 V/s to 1.2 V/s on two adjacent sites.