Figure 2.

The schematic of the applied voltage to floss the co-captured dsDNA through the dual nanopore device. The voltage at the right pore $V_R$ is kept constant while the voltage at the left pore $V_L=V_R+\mathrm{\Delta }{V}_{L\to R}$ for $L\to R$ translocation and $V_L=V_R+\mathrm{\Delta }{V}_{R\to L}$ for $R\to L$ translocation. The ratio of the voltages $V_L/V_R=0.5$ and 2.0 for $L\to R$ and $R\to L$ translocations are the same as in the experiment²² (Fig. 3a,b). $\mathrm{\Delta }{V}_{L\to R}\ne \mathrm{\Delta }{V}_{R\to L}$ in general. Other combinations are studied in Fig. 3c,d through Fig. 3k,l.